| Entries |
| Document | Title | Date |
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| 20080247938 | Process of growing carbon nanotubes directly on carbon fiber - A process for growing a carbon nanotube directly on a carbon fiber includes at least the steps of depositing a metallic film of at least 1 nm in thickness on at least one surface of a flake-shaped carbon-fiber substrate; placing the substrate into a reactor; introducing a gas including carbon-containing substances into the reactor as a carbon source needed for growing a plurality of carbon nanotubes (CNTs); and thermally cracking the carbon-containing substances in the gas to grow the carbon nanotubes directly on the substrate. | 10-09-2008 |
| 20080274036 | MICROSTRUCTURED CATALYSTS AND METHODS OF USE FOR PRODUCING CARBON NANOTUBES - Methods for producing microstructured catalytic substrates and microstructured catalytic substrates produced by the methods, and methods for growing single-walled carbon nanotubes on the microstructured catalytic substrates wherein the single-walled carbon nanotubes are preferably of a highly specific chirality. | 11-06-2008 |
| 20080279753 | Method and Apparatus for Growth of High Quality Carbon Single-Walled Nanotubes - Method and processes for synthesizing single-wall carbon nanotubes is provided. A carbon precursor gas is contacted with metal catalysts deposited on a support material. The metal catalysts are preferably nanoparticles having diameters less than about 50 nm. The reaction temperature is selected such that it is near the eutectic point of the mixture of metal catalyst particles and carbon. | 11-13-2008 |
| 20080279754 | Induced electrical property changes in single walled carbon nanotubes by electromagnetic radiation - In the apparatus and process of the present invention, it is possible to fabricate CNTs with specific diameters and morphologies. The morphology selection can yield samples of pre-selected diameter configurations making it possible to take a sample of SWNTs produced by any synthesis technique and induce a morphology change that causes the sample to be either all conductive, all narrow band gap semiconductive or wide band gap semiconductive, within a given nanotube rope. | 11-13-2008 |
| 20080292530 | CALCINATION OF CARBON NANOTUBE COMPOSITIONS - A carbon nanotube composition and method of making the same. The composition is made by: heating a precursor composition under a non-oxidizing or reducing atmosphere to form a carbon composition of carbon nanotubes and amorphous carbon; and calcining the carbon composition in the presence of oxygen to oxidize and vaporize the amorphous carbon without oxidizing the carbon nanotubes. The precursor composition includes a mixture or complex of a transition metal compound and an organic compound that chars at elevated temperatures. | 11-27-2008 |
| 20080292531 | ELECTRICAL CURRENT-INDUCED STRUCTURAL CHANGES AND CHEMICAL FUNCTIONALIZATION OF CARBON NANOTUBES - A method of cutting, thinning, welding and chemically functionalizing multiwalled carbon nanotubes (CNTs) with carboxyl and allyl moieties, and altering the electrical properties of the CNT films by applying high current densities combined with air-exposure is developed and demonstrated. Such welded high-conductance CNT networks of functionalized CNTs could be useful for device and sensor applications, and may serve as high mechanical toughness mat fillers that are amenable to integration with nanocomposite matrices. | 11-27-2008 |
| 20080317660 | Nanotube Structures, Materials, and Methods - Nanotube structures and methods for forming nanotube structures are disclosed. The methods include forming nanotubes such that they are associated with a surface of a substrate and compressing at least a portion of the nanotubes. In some embodiments, the nanotubes may be dimensionally constrained in one direction while being compressed in another direction. Compressing at least a portion of the nanotubes may comprise stamping an impression into a surface of the nanotubes, at least a portion of which is retained when the stamp is removed. In some embodiments, the nanotubes may be aligned with respect to one another and to the surface of the substrate and may extend in a direction that is, for example, normal to the substrate. | 12-25-2008 |
| 20090004095 | Porous Filamentous Nanocarbon And Method Of Forming The Same - There is provided a porous filamentous nanocarbon and a method for forming the same. A mesopore formed on an outer periphery of the porous filamentous nanocarbon is a tunnel-like pore which is formed along the arrangement direction of the carbon hexagonal plane from the outer periphery toward a fiber axis. The porous filamentous nanocarbon is fabricated by selectively removing the carbon hexagonal plane constituting the filamentous nanocarbon through gasification in virtue of a catalyst, after highly dispersing Fe, Ni, Co, Pt, etc., of which size is 2-30 nm, on the surface of the filamentous nanocarbon. That is, the tunnel-like mesopore is formed radially by nano-drilling process. The size of the porous filamentous nanocarbon can be controlled according to the size of the nano-drilling catalyst and non-drilling conditions. | 01-01-2009 |
| 20090016951 | DEVICE STRUCTURE OF CARBON FIBERS AND MANUFACTURING METHOD THEREOF - An aggregate structure of carbon fibers, organized by a plurality of carbon fibers, includes, an aggregate of the carbon fibers aligned in a lengthwise direction, in which a density of the carbon fibers at one side end is different from a density of the carbon fibers at the other side end. | 01-15-2009 |
| 20090022652 | Process for Producing Carbon Nanotube and Catalyst for Carbon Nanotube Production - Provided is a method for producing a carbon nanotube, wherein a catalyst for carbon nanotube production comprising a powdery catalyst supporting a metal on magnesia and having a bulk density of 0.30 g/mL to 0.70 g/mL, in a vertical reactor, is disposed over the whole area in a horizontal cross section direction of the reactor, in such state a carbon-containing compound flowed in a vertical direction inside the reactor is contacted with the catalyst at 500 to 1200° C., thereby carbon nanotubes of uniformity and high quality are efficiently synthesized in a large amount. | 01-22-2009 |
| 20090047207 | CATALYTIC ETCHING OF CARBON FIBERS - The present invention relates to a method for etching carbon fibers, in particular carbon nanofibers and to the carbon nanofibres obtainable by this method, and the use thereof. | 02-19-2009 |
| 20090053129 | EMBEDDED NANOPARTICLE FILMS AND METHOD FOR THEIR FORMATION IN SELECTIVE AREAS ON A SURFACE - The invention is directed to a method of positioning nanoparticles on a patterned substrate. The method comprises providing a patterned substrate with selectively positioned recesses, and applying a solution or suspension of nanoparticles to the patterned substrate to form a wetted substrate. A wiper member is dragged across the surface of the wetted substrate to remove a portion of the applied nanoparticles from the wetted substrate, and leaving a substantial number of the remaining portion of the applied nanoparticles disposed in the selectively positioned recesses of the substrate. The invention is also directed to a method of making carbon nanotubes from the positioned nanoparticles. | 02-26-2009 |
| 20090087372 | PROCESS FOR THE PREPARATION OF A CATALYST FOR THE PRODUCTION OF CARBON NANOTUBES - A process for the preparation of a catalyst for the production of carbon nanotubes, the use of the catalyst for the production of carbon nanotubes, and the carbon nanotubes obtained by this production process. The catalyst is prepared on the basis of at least two metals from the group: cobalt, manganese, iron, nickel and molybdenum from soluble precursor compounds by spray drying or spray granulation of the precursor compounds dissolved in a solvent, and subsequent calcination. | 04-02-2009 |
| 20090202422 | METHOD FOR TREATING CARBON NANOTUBES, CARBON NANOTUBES AND CARBON NANOTUBE DEVICE - A method for treating carbon nanotubes is proved, which comprises treating the carbon nanotubes with an aqueous solution containing hydroxyl radicals (HO.). | 08-13-2009 |
| 20090214411 | METHOD OF SELECTIVELY ELIMINATING METALLIC CARBON NANOTUBES, SEMICONDUCTING CARBON NANOTUBES AND PREPARATION METHOD THEREOF USING THE SAME - Metallic carbon nanotubes (“CNTs”) may be selectively eliminated and semiconducting CNTs may be prepared using light-irradiation. The light provided by the light-irradiation may have a wavelength of about 180 nm to about 11 μm. Further, the light may have an intensity of about 30 mW/cm | 08-27-2009 |
| 20090220408 | METHOD OF CUTTING CARBON NANOTUBES AND CARBON NANOTUBES PREPARED BY THE SAME - A method of cutting carbon nanotubes and carbon nanotubes prepared by the same are disclosed. The cutting method includes preparing a π-stacking complex including a doping metal, a non-polar molecule, and a bipolar solvent, adding carbon nanotubes to the π-stacking complex, followed by stirring at room temperature to prepare a metal-doped carbon nanotube solution, washing and drying the metal-doped carbon nanotube solution to prepare a metal-doped carbon nanotube powder, and performing nitric acid treatment to the metal-doped carbon nanotube powder, followed by cutting and washing with distilled water. Carbon nanotubes having a short and uniform length and open terminals can be produced in mass via a simple process, thereby expanding the uses and applications of carbon nanotubes. | 09-03-2009 |
| 20090220409 | CONTINUOUS PROCESS FOR THE PRODUCTION OF CARBON NANOFIBER REINFORCED CONTINUOUS FIBER PREFORMS AND COMPOSITES MADE THEREFROM - This invention provides a continuous process for the growth of vapor grown carbon fiber (VGCNT) reinforced continuous fiber preforms for the manufacture of articles with useful mechanical, electrical, and thermal characteristics. Continuous fiber preforms are treated with a catalyst or catalyst precursor and processed to yield VGCNT produced in situ resulting in a highly entangled mass of VGCNT infused with the continuous fiber preform. The continuous process disclosed herein provides denser and more uniform carbon nanotubes and provides the opportunity to fine-tune the variables both within an individual preform and between different preforms depending on the characteristics of the carbon nanotubes desired. The resulting continuous fiber preforms are essentially endless and are high in volume fraction of VGCNT and exhibit high surface area useful for many applications. The invention also provides for composites made from the preforms. | 09-03-2009 |
| 20090232724 | METHOD OF SEPARATING METALLIC AND SEMICONDUCTING CARBON NANOTUBES FROM A MIXTURE OF SAME - A method which permits large-scale separation of a semiconducting carbon nanotube from a mixture of metallic and semiconducting carbon nanotubes based on differences in solubility resulting from preferentially reacting the metallic carbon nanotubes with an acid functional aryldiazonium salt to form a substantially fully functionalized metallic nanotubes which can be easily separated from the unfunctionalized semiconducting carbon nanotubes. | 09-17-2009 |
| 20090285745 | Method for Production of Carbon Nanotube and Method for Purification of the Same - The present invention provides a method for producing a carbon nanotube having a high purity and a method for purifying an unpurified carbon nanotube or a carbon nanotube having a low purity. The method for producing a carbon nanotube comprises a step of providing a carbonaceous material containing a carbon nanotube and a step of adding an iron material and hydrogen peroxide to the carbonaceous material to thereby purity a carbon nanotube. It is preferred that an iron powder is used as the iron material. The iron powder is preferably used in a proportion of 0.5 to 20 parts by mass relative to 100 parts by mass of the whole carbonaceous material. | 11-19-2009 |
| 20090285746 | METHOD FOR TREATING CARBON NANOTUBES, CARBON NANOTUBES AND CARBON NANOTUBES DEVICE COMPRISING THEREOF - An efficient and cost-effective method for treating carbon nanotubes (CNTs) is provided. The method includes comprising: dispersing said carbon nanotubes in a dispersing medium to prepare a dispersion system; mixing said dispersion system with adsorbent so that type-specific carbon nanotubes contained in said dispersion system are absorbed onto the adsorbent, wherein the adsorbent is modified by a chemical/biological modifier so as to have different adsorption selectivity to carbon nanotubes of different types; and separating the adsorbent from the dispersion system, whereby the type-specific carbon nanotubes adsorbed onto the adsorbent is separated from the carbon nanotubes of another type enriched in the dispersion system; carbon nanotubes produced by the treatment method, and CNTs devices comprising thereof. | 11-19-2009 |
| 20090291042 | Continuous Method for Producing Inorganic Nanotubes - Production of nanotubes of carbon or of other inorganic material by moving a carbon-containing substrate, such as a tape or belt of carbon fibres, within a reaction chamber either though an electric arc in a gap between two electrodes or adjacent an electrode so that an electric arc exists between the electrode and the substrate, to cause the nanotubes to form on the substrate. The method enables the continuous or semi-continuous production of nanotubes. Preferably, the process is carried out at atmospheric pressure and nanotubes of high purity are produced. | 11-26-2009 |
| 20100003186 | CARBON FIBER - According to the present invention, there is disclosed a carbon fiber having a strand tensile strength of 6,100 MPa or more, a strand tensile modulus of 340 GPa or more and a density of 1.76 g/cm | 01-07-2010 |
| 20100021367 | FACILE PURIFICATION OF CARBON NANOTUBES WITH LIQUID BROMINE AT ROOM TEMPERATURE - A method of removing metal impurities from carbon nanotubes includes treating carbon nanotubes with distilled bromine in a substantially oxygen- and water-free atmosphere and then removing the distilled bromine from the carbon nanotubes. Purified carbon nanotubes having an iron content from about 2.5 to about 3.5 by weight that are substantially free of derivatization at the ends and defect sites are made available via this method. | 01-28-2010 |
| 20100021368 | Catalytic etching of carbon fibers - The present invention relates to a method for etching carbon fibers, in particular carbon nanofibers and to the carbon nanofibres obtainable by this method, and the use thereof. | 01-28-2010 |
| 20100028247 | METHODS FOR SELECTIVE FUNCTIONALIZATION AND SEPARATION OF CARBON NANOTUBES - The present invention is directed toward methods of selectively functionalizing carbon nanotubes of a specific type or range of types, based on their electronic properties, using diazonium chemistry. The present invention is also directed toward methods of separating carbon nanotubes into populations of specific types or range(s) of types via selective functionalization and electrophoresis, and also to the novel compositions generated by such separations. | 02-04-2010 |
| 20100040529 | ENHANCED CARBON NANOTUBE - Techniques for manufacturing an enhanced carbon nanotube (CNT) assembly are provided. In one embodiment, a method of manufacturing an enhanced CNT assembly comprises preparing a metal tip, preparing a CNT plus transition-metal colloidal solution, forming a CNT plus transition-metal composite assembly by using the prepared metal tip and CNT plus transition-metal colloidal solution, and growing the CNT plus transition-metal composite assembly. | 02-18-2010 |
| 20100047152 | GROWTH OF CARBON NANOTUBES USING METAL-FREE NANOPARTICLES - The present invention provides a method for forming at least one carbon nanotube ( | 02-25-2010 |
| 20100047153 | METHOD OF MANUFACTURING CARBON FIBRES - The present invention relates to a method of manufacturing carbon fibres from raw materials of renewable origin, comprising:
| 02-25-2010 |
| 20100061918 | PROCESS FOR PRODUCING SINGLE-WALLED CARBON NANOTUBES WITH INCREASED DIAMETER - There is provided a process for producing single-walled carbon nanotubes with an increased diameter, characterized in that it comprises a diameter-increasing treatment step of heating carbon nanotubes of a raw material at a degree of vacuum of 1.3×10 | 03-11-2010 |
| 20100068123 | Carbon nano-fibre production - This invention provides a reactor for carbon nano-fibre production comprising a generally horizontal elongate cylindrical reaction vessel arranged to rotate about its cylindrical axis and containing in use a particulate catalyst-containing reaction bed, said reaction vessel having a gas inlet port and a gas outlet port positioned such that one of said inlet and outlet ports is in said bed and the other is outside said bed. | 03-18-2010 |
| 20100068124 | NANOSTRUCTURE DEVICES AND FABRICATION METHOD - An ion flux is directed to a carbon nanotube to permanently shape, straighten and/or bend the carbon nanotube into a desired configuration. Such carbon nanotubes have many properties that make them ideal as probes for Scanning Probe Microscopy and many other applications. | 03-18-2010 |
| 20100074833 | Catalyst Body For Production of Brush-Shaped Carbon Nanostructure, Process for Producing Catalyst Body, Brush-Shaped Carbon Nanostructure, and Process for Producing the Same - It is intended to highly efficiently produce a high-density brush-shaped carbon nanostructure useful in the production of CNT assembly, such as rope-shaped CNTs, and provide a catalyst body for production of brush-shaped carbon nanostructure that enables the production. The catalyst body for production of brush-shaped carbon nanostructure is one comprising a substrate ( | 03-25-2010 |
| 20100080748 | CONTINUOUS METHOD AND APPARATUS OF PURIFYING CARBON NANOTUBES - Provided is a continuous method and apparatus of purifying carbon nanotubes. The continuous method and apparatus of purifying carbon nanotubes is characterized in a first purifying step for injecting a carbon nanotube liquid mixture containing an oxidizer into a purifying reactor under a sub-critical water or supercritical water condition at a pressure of 50 to 400 atm and a temperature of 100 to 600° C. to obtain a purified product, thereby removing amorphous carbon and producing the carbon nanotube product. | 04-01-2010 |
| 20100086470 | Rapid microwave process for purification of nanocarbon preparations - A novel microwave-assisted process is described for the rapid removal of catalytic metal and non-desirable carbon impurities in fullerene, single wall, and multiple wall carbon nanotube preparations. The purification process is carried out at various programmed pressures, power levels and reaction times in a suspension of the nanocarbon moieties in the presence of strong acids (for example, a mixture of sulfuric acid and nitric acid), in weak acids (for example, acetic acid) and in the presence of chelating agents (for example, EDTA—ethylenediaminetetraacetic acid). In one embodiment, high metal removal efficiency of 70 to 90% is observed. | 04-08-2010 |
| 20100086471 | Mixed structures of single walled and multi walled carbon nanotubes - The invention relates to carbon nanotube structures containing both single walled and multi walled carbon nanotubes, and methods for preparing same. These carbon nanotube structures include but are not limited to macroscopic two and three dimensional structures of carbon nanotubes such as assemblages, mats, plugs, networks, rigid porous structures, extrudates, etc. The carbon nanotube structures of the present invention have a variety of uses, including but not limited to, porous media for filtration, adsorption, chromatography; electrodes and current collectors for supercapacitors, batteries and fuel cells; catalyst supports, (including electrocatalysis), etc. | 04-08-2010 |
| 20100119435 | Processes for growing carbon nanotubes in the absence of catalysts - Processes for increasing the production rate of single-wall carbon nanotubes using a disordered carbon target are disclosed. The processes use a disordered carbon target and include vaporization of the target in the presence of a non-oxidizing gas. The single-wall nanotubes produced can be incorporated into electronic devices such as diodes and transistors. | 05-13-2010 |
| 20100119436 | PURIFICATION METHOD FOR CARBON MATERIAL CONTAINING CARBON NANOTUBES, CARBON MATERIAL PRODUCED BY THE SAME METHOD, AND RESIN MOLDING, FIBER, HEAT SINK, SLIDER, MATERIAL FOR FIELD ELECTRON EMISSION SOURCE, CONDUCTION AID FOR ELECTRODE, CATALYST SUPPORT...... - A purification method for a carbon material containing carbon nanotubes is provided, which satisfies the following requirements: The method should prevent carbon nanotubes from being damaged, broken or flocculated; the method should be capable of removing the catalyst metal and carbon components other than the carbon nanotubes; and the method should be applicable to not only multi-walled carbon nanotubes but also single-walled carbon nanotubes which will undergo significant structural changes when heated to 1400° C. or higher temperatures. The method is characterized by including a carbon material preparation process for preparing a carbon material containing carbon nanotubes by an arc discharge method, using an anode made of a material containing at least carbon and a catalyst metal; and a halogen treatment process for bringing the carbon material into contact with a gas containing a halogen and/or halogen compound. | 05-13-2010 |
| 20100124529 | Method of manufacturing carbon cylindrical structures and biopolymer detection device - A method of manufacturing carbon cylindrical structures, as represented by carbon nanotubes, by growing them on a substrate using a chemical vapor deposition (CVD) method, comprising the steps of implanting metal ions to the substrate surface and then growing the carbon cylindrical structures using the metal ions as a catalyst. A method of manufacturing carbon nanotubes comprising a step of using nano-carbon material as seed material for growing carbon nanotubes is also disclosed. A biopolymer detection device comprising vibration inducing part for inducing vibration, binding part capable of resonating with the vibration induced by the vibration inducing part and capable of binding or interacting with a target biopolymer, and detection part for detecting whether or not the binding part have bound or interacted with the target biopolymer, is also disclosed. | 05-20-2010 |
| 20100143234 | METHODS OF PREPARING AND PURIFYING CARBON NANOTUBES, CARBON NANOTUBES, AND AN ELEMENT USING THE SAME - A method of preparing carbon nanotubes (CNT), a method of purifying carbon nanotubes, carbon nanotubes, and an element using said carbon nanotubes are provided. The method includes preparing carbon nanotubes by arc-discharge and employs a coordination chemistry process to remove a catalyst and/or optional promoter used in arc-discharge. | 06-10-2010 |
| 20100158788 | Supported Catalyst with Solid Sphere Structure, Method for Preparing the Same and Carbon Nanotubes Prepared Using the Same - A supported catalyst with a solid sphere structure of the present invention includes an oxide supporting body and a metal such as Ni, Co, Fe, or a combination thereof distributed on the surface and inside of the supporting body. The supported catalyst with a solid sphere structure can maintain a spherical shape during heat treatment and can be used with a floating bed reactor due to the solid sphere structure thereof. | 06-24-2010 |
| 20100189628 | METHOD FOR DISENTANGLEMENT OF CARBON NANOTUBE BUNDLES - Bundled carbon nanotubes are disentangled and dispersed using the principles of extreme pressure reduction of fluids carrying the bundled nanotubes. They are added to a high pressure fluid upstream of a chamber operated at much lower pressure. These high-low pressure ratios are preferably at least 100:1. As the high pressure fluid enters the lower pressure chamber it violently expands causing separation and disentanglement of the bundled carbon fibers. To further assist in this disentanglement a nozzle may be used at the inlet to the lower pressure chamber to direct the high pressure fluid against a hardened anvil in the chamber. This impact further aids disentanglement. Coating the nanotubes with a dispersant also improves disentanglement. | 07-29-2010 |
| 20100196249 | Aligned carbon nanotube bulk aggregate, process for producing the same and uses thereof - An aligned carbon nanotube bulk structure capable of attaining high density and high hardness not found so far. The aligned carbon nanotube bulk structure has a plurality of carbon nanotubes (CNTs) applied with a density-increasing treatment, and having alignment in a predetermined direction, the structure has a degree of anisotropy of 1:3 or more between the direction of alignment and the direction vertical to the direction of alignment, and the intensity by irradiating X-rays along the direction of alignment is higher than the intensity by irradiating X-rays from the direction vertical to the direction of alignment at a (002) peak in X-ray diffraction data, and the degree of alignment thereof satisfies predetermined conditions. | 08-05-2010 |
| 20100196250 | CONTINUOUS METHOD FOR OBTAINING COMPOSITE FIBRES CONTAINING COLLOIDAL PARTICLES AND RESULTING FIBRE - The invention relates to a method for obtaining composite fibers, that comprises dispersing colloidal particles in a solvent, injecting the dispersion into a co-flow of a polymer coagulation solution for forming a pre-fiber, circulating the pre-fiber in a duct, extracting, optionally washing and drying the pre-fiber in order to obtain a fiber, and winding the fiber thus obtained, characterized in that the minimum retention time of the fiber within the duct is adjusted so that it has a mechanical strength sufficient to be extracted from the duct, and in that its extraction is vertical and continuous. The invention also relates to composite fibers that can be made according to said method. | 08-05-2010 |
| 20100202957 | ACTIVATED CARBON FIBERS AND ENGINEERED FORMS FROM RENEWABLE RESOURCES - A method of producing activated carbon fibers (ACFs) includes the steps of providing a natural carbonaceous precursor fiber material, blending the carbonaceous precursor material with a chemical activation agent to form chemical agent-impregnated precursor fibers, spinning the chemical agent-impregnated precursor material into fibers, and thermally treating the chemical agent-impregnated precursor fibers. The carbonaceous precursor material is both carbonized and activated to form ACFs in a single step. The method produces ACFs exclusive of a step to isolate an intermediate carbon fiber. | 08-12-2010 |
| 20100202958 | POROUS FILAMENTOUS NANOCARBON AND METHOD OF FORMING THE SAME - A method for forming a porous filamentous nanocarbon involves radially forming a tunnel-like mesopore from an outer periphery toward the central axis of a filamentous nano carbon by attaching a material having a metal catalyst on an outer periphery of the filamentous nanocarbon and removing a carbon hexagonal plane through gasification in virtue of the metal catalyst. | 08-12-2010 |
| 20100221173 | METHOD FOR PREPARING SINGLE WALLED CARBON NANOTUBES FROM A METAL LAYER - Methods of preparing single walled carbon nanotubes are provided. An arrangement comprising one or more layers of fullerene in contact with one side of a metal layer and a solid carbon source in contact with the other side of metal layer is prepared. The fullerene/metal layer/solid carbon source arrangement is then heated to a temperature below where the fullerenes sublime. Single walled carbon nanotubes are grown on the fullerene side of the metal layer. | 09-02-2010 |
| 20100233067 | METHOD OF PRODUCING CUP-SHAPED NANOCARBON AND CUP-SHAPED NANOCARBON - A method of producing of the present invention is a method of producing a cup-shaped nanocarbon formed of graphene sheets. A nanocarbon molecule has a cup shape, a bottom surface and an upper surface thereof being opened. The method of producing of the present invention includes the following processes (A) and (B).
| 09-16-2010 |
| 20100239490 | Processes for growing carbon nanotubes using disordered carbon target - Processes for producing single-wall carbon nanotubes without catalysts are provided. The nanotubes are produced by vaporizing silicon carbide and carbon. | 09-23-2010 |
| 20100247419 | SOLID PHASE SYNTHESIZED CARBON NANO FIBER AND TUBE - A carbon nano tube characterized by Bragg diffraction pattern peaks appearing at 2 theta (2θ)=26.5°, 44.5°, 51.8°. A carbon nano fiber is disclosed and characterized by Bragg diffraction pattern peaks appearing 2 theta (2θ)=44.5°, 51.8°. These carbon nano materials can be prepared in a solid phase by combustion and heating of the solid raw materials both with and without a tube control agent. The carbon nano tube growth process can include controlling the length of the tubes. | 09-30-2010 |
| 20100247420 | Pretreatment Method for the Synthesis of Carbon Nanotubes and Carbon Nanostructures from Coal and Carbon Chars - Carbon nanostructures such as multiwalled carbon nanotubes are formed from electrolyzed coal char. The electrolyzed coal char is formed by forming a slurry of coal particles, metal catalyst and water and subjecting this to electrolysis, which generates carbon dioxide and hydrogen. This forms a coating on the particles which includes metal catalysts. These particles can be used as is for formation of multi-walled carbon nanotubes using a pyrolysis method or other method without the addition of any catalyst. The gelatinous coating can be separated from the char and used as a fuel or as a carbon source to form carbon nanostructures. | 09-30-2010 |
| 20100254886 | Carbon Nanotube Particulates, Compositions and Use Thereof - A method for making carbon nanotube particulates involves providing a catalyst comprising catalytic metals, such as iron and molybdenum or metals from Group VIB or Group VIIIB elements, on a support material, such as magnesia, and contacting the catalyst with a gaseous carbon-containing feedstock, such as methane, at a sufficient temperature and for a sufficient contact time to make small-diameter carbon nanotubes having one or more walls and outer wall diameters of less than about 3 nm. Removal of the support material from the carbon nanotubes yields particulates of enmeshed carbon nanotubes that retain an approximate three-dimensional shape and size of the particulate support that was removed. The carbon nanotube particulates can comprise ropes of carbon nanotubes. The carbon nanotube particulates disperse well in polymers and show high conductivity in polymers at low loadings. As electrical emitters, the carbon nanotube particulates exhibit very low “turn on” emission field. | 10-07-2010 |
| 20100254887 | Carbon Fibers Having Improved Strength and Modulus and an Associated Method and Apparatus for Preparing Same - The invention is directed to carbon fibers having high tensile strength and modulus of elasticity. The invention also provides a method and apparatus for making the carbon fibers. The method comprises advancing a precursor fiber through an oxidation oven wherein the fiber is subjected to controlled stretching in an oxidizing atmosphere in which tension loads are distributed amongst a plurality of passes through the oxidation oven, which permits higher cumulative stretches to be achieved. The method also includes subjecting the fiber to controlled stretching in two or more of the passes that is sufficient to cause the fiber to undergo one or more transitions in each of the two or more passes. The invention is also directed to an oxidation oven having a plurality of cooperating drive rolls in series that can be driven independently of each other so that the amount of stretch applied to the oven in each of the plurality of passes can be independently controlled. | 10-07-2010 |
| 20100260658 | METHOD OF PRODUCING PRE-OXIDATION FIBER AND CARBON FIBER - There is disclosed a method of producing a pre-oxidation fiber in the production of the pre-oxidation fiber by subjecting a polyacrylic precursor fiber to pre-oxidation processing in an oxidizing atmosphere, including shrinking the precursor fiber as a pretreatment of pre-oxidation at a load of 0.58 g/tex or less in the temperature range of 220 to 260° C. under conditions in which the degree of cyclization (I | 10-14-2010 |
| 20100278716 | DISPERSION CONTAINING FLAME-RESISTANT POLYMER, FLAME-RESISTANT FIBER, AND CARBON FIBER - A dispersion contains a flame-resistant polymer, which can improve shaping stability of the flame-resistant polymer during ejection from a die orifice, and physical stability of a shaped product in a washing step. The dispersion containing a flame-resistant polymer is a dispersion in which a flame-resistant polymer is dispersed in an organic solvent, an in-water tensile strength thereof per unit cross-sectional area is 1.0 MPa or more and 6.5 MPa or less, the flame-resistant polymer can be preferably obtained by heat-treating an acrylonitrile polymer in the presence of at least one kind of acid, acid anhydride or acid chloride in an organic solvent, and a suitable organic solvent is a polar organic solvent. | 11-04-2010 |
| 20100284896 | Increasing the specific strength of spun carbon nanotube fibers - A spun fiber of carbon nanotubes is exposed to ion irradiation. The irradiation exposure increases the specific strength of the spun fiber. | 11-11-2010 |
| 20100310446 | Carbon and Electrospun Nanostructures - The present invention is directed to the production of nanostructures, e.g., single wall carbon nanotubes (“SWNT”) and/or multi wall carbon nanotubes (“MWNT”), from solutions containing a polymer, such as polyacrylonitrile (PAN). In particular, the invention is directed to the production of nanostructures, for example, SWNT and/or MWNT, from mixtures, e.g., solutions, containing polyacrylonitrile, polyaniline emeraldine base (PANi) or a salt thereof, an iron salt, e.g., iron chloride, and a solvent. In one embodiment, a mixture containing polyacrylonitrile, polyaniline emeraldine base or a salt thereof, an iron salt, e.g., iron chloride, and a solvent is formed and the mixture is electrospun to form nanofibers. In another embodiment, the electrospun nanofibers are then oxidized, e.g., heated in air, and subsequently pyrolyzed to form carbon nanostructures. | 12-09-2010 |
| 20110020211 | High Throughput Carbon Nanotube Growth System, and Carbon Nanotubes and Carbon Nanofibers Formed Thereby - A system is provided for forming carbon nanotubes comprising growing carbon nanotubes using a hot filament CVD system. | 01-27-2011 |
| 20110027163 | Hollow nanofibers-containing composition - A method for preparing hollow nanofibers having carbon as a primary component by contacting a carbon-containing compound with a catalyst at 500 to 1200° C., wherein the catalyst is one of a zeolite exhibiting thermal resistance at 900° C. and, supported thereon, a metal; a metallosilicate zeolite containing a heteroatom except aluminum and silicon and a metal; a supporting material and fine cobalt particles exhibiting a binding energy of a cobalt 2P3/2 electron of 779.3 to 781.0 eV; a supporting material and fine cobalt particles exhibiting a cobalt atom ratio in the surface of the supporting material of 0.1 to 1.5%, as measured by the X-ray photoelectron spectroscopy at 10 kV and 18 mA; a supporting material and fine cobalt particles exhibiting a weight ratio of cobalt to a second metal component of 2.5 or more; and a zeolite having a film form and a metal. | 02-03-2011 |
| 20110033365 | PROCESS AND APPARATUS FOR PRODUCING CARBONACEOUS FILM - This invention provides a process and apparatus for producing a carbonaceous film such as a DLC film using a solid raw material without the need to supply a high energy radiation such as a laser beam. The process comprises providing a solid organic material as a raw material, applying a discharge energy to the material to form plasma, and depositing the plasma onto a base material to form a carbonaceous film. This process is preferably carried out by using a film production apparatus ( | 02-10-2011 |
| 20110033366 | REACTANT LIQUID SYSTEM FOR FACILITATING THE PRODUCTION OF CARBON NANOSTRUCTURES - A method includes isolating carbon atoms as carbide anions below a surface of a reactant liquid. The carbide anions are then enabled to escape from the reactant liquid to a collection area where carbon nanostructures may form. A carbon structure produced in this fashion includes at least one layer made up of hexagonally arranged carbon atoms. Each carbon atom has three covalent bonds to adjoining carbon atoms and one unbound pi electron. | 02-10-2011 |
| 20110038786 | Separation of Carbon Nanotubes in Density Gradients - The separation of single-walled carbon nanotubes (SWNTs), by chirality and/or diameter, using centrifugation of compositions of SWNTs in and surface active components in density gradient media. | 02-17-2011 |
| 20110038787 | PARTITION AND TRANSPORTATION OF ENCAPSULATED ATOMS - A system includes a carbon nanotube and a torsion device. The torsion device is coupled to the carbon nanotube. The torsion device is configured to apply torsion to the carbon nanotube. | 02-17-2011 |
| 20110038788 | CARBON-FIBER PRECURSOR FIBER, CARBON FIBER, AND PROCESSES FOR PRODUCING THESE - A carbon fiber precursor fiber having a weight average molecular weight M | 02-17-2011 |
| 20110064645 | CARBON NANOTUBE AND METHOD FOR PRODUCING THE SAME - The present invention provides a method for producing carbon nanotubes comprising (a) providing a substrate; (b) coating a catalyst layer on said substrate; (e) heating the substrate from step (b); (d) continuously supplying a carbon source to grow carbon nanotubes; (e) interrupting the supplement of the carbon source and supplying an oxidizing gas; and (f) resupplying the carbon source to make the carbon nanotubes obtained from step (d) to re-grow at a higher growth rate. The present invention also provides carbon nanotubes fabricated by the above-mentioned method. The carbon nanotubes have extremely excellent field emission properties. | 03-17-2011 |
| 20110110843 | NEAT CARBON NANOTUBE ARTICLES PROCESSED FROM SUPER ACID SOLUTIONS AND METHODS FOR PRODUCTION THEREOF - Articles comprising neat, aligned carbon nanotubes and methods for production thereof are disclosed. The articles and methods comprise extrusion of a super acid solution of carbon nanotubes followed by removal of the super acid solvent. The articles may be processed by wet-jet wet spinning, dry-jet wet spinning, and coagulant co-flow extrusion techniques. | 05-12-2011 |
| 20110158895 | HIGH MODULE CARBON FIBER AND METHOD FOR FABRICATING THE SAME - The invention provides a high module carbon fiber and a fabrication method thereof. The high module carbon fiber includes the product fabricated by the following steps: subjecting a pre-oxidized carbon fiber to a microwave assisted graphitization process, wherein the pre-oxidized carbon fiber is heated to a graphitization temperature of 1000-3000° C. for 1-30 min. Further, the high module carbon fiber has a tensile strength of between 2.0-6.5 GPa and a module of between 200-650 GPa. | 06-30-2011 |
| 20110171110 | MICROWAVE-ASSISTED SYNTHESIS OF CARBON NANOTUBES FROM TANNIN, LIGNIN, AND DERIVATIVES - A method of synthesizing carbon nanotubes. In one embodiment, the method includes the steps of: (a) dissolving a first amount of a first transition-metal salt and a second amount of a second transition-metal salt in water to form a solution; (b) adding a third amount of tannin to the solution to form a mixture; (c) heating the mixture to a first temperature for a first duration of time to form a sample; and (d) subjecting the sample to a microwave radiation for a second duration of time effective to produce a plurality of carbon nanotubes. | 07-14-2011 |
| 20110171111 | BENT CARBON NANOTUBES AND METHODS OF PRODUCTION - A method of producing carbon nanotubes includes directing a flow of a gas over a substrate to provide growth of at least one carbon nanotube in a carbon-nanotube-growth region of the substrate; applying an electric field to the carbon-nanotube-growth region of the substrate after the at least one carbon nanotube has begun to grow in the carbon-nanotube-growth region, the electric field being substantially in a first direction in the carbon-nanotube-growth region; and changing the electric field at a preselected time to be substantially in a second direction in the carbon-nanotube-growth region during growth of the at least one carbon nanotube. The second direction is different from the first direction resulting in a bend substantially at a selected position of the at least one carbon nanotube, the method of producing carbon nanotubes providing the production of the at least one carbon nanotube having at least one bend substantially at a selected position along the at least one carbon nanotube. | 07-14-2011 |
| 20110223094 | METHOD FOR SYNTHESIS OF HIGH QUALITY GRAPHENE - A method is described herein for the providing of high quality graphene layers on silicon carbide wafers in a thermal process. With two wafers facing each other in close proximity, in a first vacuum heating stage, while maintained at a vacuum of around 10 | 09-15-2011 |
| 20110243831 | CARBON FIBER PRECURSOR FIBER BUNDLE, PRODUCTION METHOD AND PRODUCTION DEVICE THEREFOR, AND CARBON FIBER AND PRODUCTION METHOD THEREFOR - A production method of a carbon fiber precursor fiber and/or a fiber bundle which permits easy bundling of a plurality of small tows into one bundle, with a dividing capability to divide into the original small tows spontaneously at the time of firing, and is suitable for obtaining a carbon fiber that is excellent in productivity and quality. A production method of carbon fiber precursor fiber and/or a fiber bundle that has a degree of intermingle of 1 m | 10-06-2011 |
| 20110262341 | PROCESS FOR PREPARATION OF CARBON NANOTUBES FROM VEIN GRAPHITE - A catalyst free process for manufacturing carbon nanotubes by inducing an arc discharge from a carbon anode and a carbon cathode in an inert gas atmosphere contained in a closed vessel. The process is carried out at atmospheric pressure in the absence of external cooling mechanism for the carbon cathode or the carbon anode. | 10-27-2011 |
| 20110274612 | LIGNIN DERIVATIVE, SHAPED BODY COMPRISING THE DERIVATIVE AND CARBON FIBERS PRODUCED FROM THE SHAPED BODY - A lignin derivative is produced from a lignin with the empirical formula L(OH) | 11-10-2011 |
| 20110280792 | CARBON NANOMATERIALS PRODUCED FROM HEAVY OIL FRACTIONS AND METHOD FOR PRODUCING SAME - The present invention relates to a method for producing carbon nanoparticles from heavy petroleum fractions as the carbon source (precursor), particularly aromatic oil residue (RARO) by chemical vapor deposition (CVD), and optionally by using an organometallic catalyst that is soluble in the precursor. The main feature of the method according to the invention is that the precursor is evaporated in a controlled manner so as to provide a pulse supply of precursor having a constant composition to the inside of a tubular furnace which can be arranged in a vertical position for the continuous production of nanomaterials or in a horizontal position for batch production. | 11-17-2011 |
| 20110280793 | CARBON NANOTUBE FIBERS/FILAMENTS FORMULATED FROM METAL NANOPARTICLE CATALYST AND CARBON SOURCE - Disclosed is a method of: providing a mixture of a polymer or a resin and a transition metal compound, producing a fiber from the mixture, and heating the fiber under conditions effective to form a carbon nanotube-containing carbonaceous fiber. The polymer or resin is an aromatic polymer or a precursor thereof and the mixture is a neat mixture or is combined with a solvent. Also disclosed are a carbonaceous fiber or carbonaceous nanofiber sheet having at least 15 wt. % carbon nanotubes, a fiber or nanofiber sheet having the a polymer or a resin and the transition metal compound, and a fiber or nanofiber sheet having an aromatic polymer and metal nanoparticles. | 11-17-2011 |
| 20110311430 | PROCESS FOR PRODUCTION OF PRECURSOR FIBER FOR PREPARING CARBON FIBER HAVING HIGH STRENGTH AND HIGH ELASTIC MODULUS - The present invention provides a process for producing a precursor fiber which can provide a carbon fiber having high strength and high elastic modulus. The process of the present invention comprises a step where an aqueous solution of amphoteric molecule is prepared; a step where carbon nanotube is added to the aqueous solution of the amphoteric molecule so that the carbon nanotube is dispersed therein to prepare a dispersion of carbon nanotube; a step where the carbon nanotube dispersion is mixed with a polyacrylonitrile polymer and rhodanate or zinc chloride to prepare a spinning dope; a step where a coagulated yarn is prepared from the spinning dope by a wet or dry-wet spinning method; and a step where the coagulated yarn is drawn to give a precursor fiber for carbon fiber. | 12-22-2011 |
| 20110318255 | CARBON NANOTUBE STRUCTURE - A carbon nanotube structure includes a number of carbon wires and a number of second carbon nanotubes. Each of the carbon nanotube wires includes a number of first carbon nanotubes joined end to end by the carbon-carbon bonds therebetween. The carbon wires and the carbon nanotubes are joined by van der Waals attractive force therebetween. | 12-29-2011 |
| 20120034150 | Method for Producing Solid Carbon by Reducing Carbon Oxides - A method for the production of various morphologies of solid carbon product by reducing carbon oxides with a reducing agent in the presence of a catalyst. The carbon oxides are typically either carbon monoxide or carbon dioxide. The reducing agent is typically either a hydrocarbon gas or hydrogen. The desired morphology of the solid carbon product may be controlled by the specific catalysts, reaction conditions and optional additives used in the reduction reaction. The resulting solid carbon products have many commercial applications. | 02-09-2012 |
| 20120082613 | Method for Production of Carbon Nanotube and Method for Purification of the Same - The present invention provides a method for producing a carbon nanotube having a high purity and a method for purifying an unpurified carbon nanotube or a carbon nanotube having a low purity. The method for producing a carbon nanotube comprises a step of providing a carbonaceous material containing a carbon nanotube and a step of adding an iron material and hydrogen peroxide to the carbonaceous material to thereby purity a carbon nanotube. It is preferred that an iron powder is used as the iron material. The iron powder is preferably used in a proportion of 0.5 to 20 parts by mass relative to 100 parts by mass of the whole carbonaceous material. | 04-05-2012 |
| 20120093710 | PURIFIED CARBON NANOTUBES - Provided is a continuous method and apparatus of purifying carbon nanotubes. The continuous method and apparatus of purifying carbon nanotubes is characterized in a first purifying step for injecting a carbon nanotube liquid mixture containing an oxidizer into a purifying reactor under a sub-critical water or supercritical water condition at a pressure of 50 to 400 atm and a temperature of 100 to 600° C. to obtain a purified product, thereby removing amorphous carbon and producing the carbon nanotube product. | 04-19-2012 |
| 20120107221 | METHOD FOR THE SYNTHESIS OF CARBON NANOTUBES ON LONG PARTICULATE MICROMETRIC MATERIALS - The invention relates to a method for the synthesis of carbon nanotubes on the surface of a material. The invention more particularly relates to a method for the synthesis of carbon nanotubes (or CNT) at the surface of a material using a carbon source comprising acetylene and xylene, and a catalyst containing ferrocene. The method of the invention has the advantage, amongst others, of enabling the continuous synthesis of nanotubes when desired. Also, the method of the invention is carried out at temperatures lower than those of known methods and on materials on which the growth of carbon nanotubes is difficulty reproducible and/or difficulty homogenous in terms of CNT diameter and density (number of CNT per surface unit). Said advantages, amongst others, make the method of the invention particularly useful at the industrial level. The invention also relates to materials that can be obtained by said method and to the use thereof in all the known application fields of carbon nantubes, in particular as a reinforcement for preparing structural and functional composite materials. | 05-03-2012 |
| 20120148474 | EMBEDDED NANOPARTICLE FILMS AND METHOD FOR THEIR FORMATION IN SELECTIVE AREAS ON A SURFACE - The invention is directed to a method of positioning nanoparticles on a patterned substrate. The method comprises providing a patterned substrate with selectively positioned recesses, and applying a solution or suspension of nanoparticles to the patterned substrate to form a wetted substrate. A wiper member is dragged across the surface of the wetted substrate to remove a portion of the applied nanoparticles from the wetted substrate, and leaving a substantial number of the remaining portion of the applied nanoparticles disposed in the selectively positioned recesses of the substrate. The invention is also directed to a method of making carbon nanotubes from the positioned nanoparticles. | 06-14-2012 |
| 20120308471 | SELECTIVE ETCHING OF SINGLE WALLED CARBON NANOTUBES - Described is a method for the selective etching of single walled carbon nanotubes with CO | 12-06-2012 |
| 20130028829 | SYSTEM AND METHOD FOR GROWTH OF ENHANCED ADHESION CARBON NANOTUBES ON SUBSTRATES - Disclosed herein is a method of growth of enhanced adhesion MWCNTs on a substrate, referred to as the HGTiE process, the method comprising: chemical vapor deposition of an adhesive underlayer composed of alumina on a substrate composed of titanium or similar; chemical vapor deposition of a catalyst such as a thin film of iron on top of the adhesive underlayer; pretreatment of the substrate to hydrogen at high temperature; and exposure of the substrate to a feedstock gas such as ethylene at high temperature. The substrate surface may be roughened before placement of an adhesive layer through mechanical grinding or chemical etching. Finally, plasma etching of the MWCNT film may be performed with oxygen plasma. This method of growth allows for high strength adhesion of MWCNTs to the substrate the MWCNTs are grown upon. | 01-31-2013 |
| 20130039839 | PRODUCTION OF CARBON NANOTUBES - The invention relates to a novel process for the production of catalysts for the production of carbon nanotubes in agglomerated form, which are characterised by a low bulk density. This invention likewise provides the catalysts, their use in the production of carbon nanotubes in high catalyst-specific yields, and the carbon nanotubes produced by this process. | 02-14-2013 |
| 20130052120 | METHOD FOR SEPARATING AND COLLECTING CARBON NANOTUBE, AND CARBON NANOTUBE - Metallic CNTs and semiconducting CNTs are efficiently separated from a CNT mixture of these CNTs, and semiconducting CNTs are separated by structure by using a method that enables separation in high yield in a short time period while conveniently enabling mass processing and automatic processing with inexpensive equipment. | 02-28-2013 |
| 20130101494 | Hydrophilic Silicone Copolymers Useful In Carbon Fiber Production - Robust oiling agent compositions for use in preparing carbon fibers from acrylic polymer carbon fiber precursors contain at least one silicone copolymer minimally containing an organopolysiloxane moiety, a polyoxyalkylene polyether moiety, and at least one internal or terminal urea or urethane group. | 04-25-2013 |
| 20130101495 | SYSTEMS AND METHODS FOR CONTINUOUSLY PRODUCING CARBON NANOSTRUCTURES ON REUSABLE SUBSTRATES - A system includes a reusable substrate upon which a carbon nanostructure is formed as a carbon nanostructure-laden reusable substrate, a first conveyor system adapted to continuously convey the reusuable substrate through a carbon nanotube catalyst application station and carbon nanostructure growth station, and a second conveyor system adapted to create an interface between a second substrate and the carbon nanostructure-laden reusuable substrate, the interface facilitating transfer of a carbon nanostructure from the carbon nanostructure-laden reusuable substrate to the second substrate. A method includes growing a carbon nanostructure on a reusable substrate, the carbon nanostructure includes a carbon nanotube polymer having a structural morphology comprising interdigitation, branching, crosslinking, and shared walls and transferring the carbon nanostructure to a second substrate to provide a carbon nanostructure-laden second substrate. The method is adapted for continuous carbon nanostructure production on the reusable substrate. A pre-preg includes such a carbon nanostructure. | 04-25-2013 |
| 20130156679 | METHOD AND APPARATUS FOR FORMING NANOPARTICLES - A first layer of a catalyst material is formed on a substrate and heat treated to form a first plurality of nanoparticles. A second layer of a catalyst material is then formed over the substrate and the first plurality of nanoparticles and heat treated to form a second plurality of nanoparticles. The first layer of nanoparticles is advantageously not affected by the deposition or heat treatment of the second layer of catalyst material, for example being pinned or immobilised, optionally by oxidation, before formation of the second layer. | 06-20-2013 |
| 20130164207 | COMPOSITE RAW MATERIAL, CARBON FIBER MATERIAL AND METHOD FOR FORMING THE SAME - In one embodiment of the disclosure, a composite raw material and a method for forming the same are provided. The method includes sulfonating a polycyclic aromatic compound to form a polycyclic aromatic carbon sulfonate (PCAS); and mixing the polycyclic aromatic carbon sulfonate and a polyacrylonitrile (PAN) to form a composite raw material. In another embodiment of the disclosure, a carbon fiber containing the composite raw material described above and a method for forming the same are provided. | 06-27-2013 |
| 20130171054 | Supported Catalyst for Synthesizing Multi-Wall Carbon Nanotubes and Method for Preparing the Same - A supported catalyst for synthesizing multi-walled carbon nanotubes includes a supporting body and a metal catalyst including Fe, Co, and Mn in a mole ratio according to Equation (1): | 07-04-2013 |
| 20130216469 | METHOD OF MANUFACTURING INFRARED SENSOR MATERIAL, INFRARED SENSOR MATERIAL, INFRARED SENSOR DEVICE AND INFRARED IMAGE SENSOR - A method of manufacturing an infrared sensor material includes preparing a CNT dispersion solution by dispersing a Carbon Nanotube (CNT) in a solvent, forming a CNT thin film using the CNT dispersion solution as a raw material, and annealing the CNT thin film so that an absolute value of the temperature coefficient of resistance is equal to or more than 1%/K at a temperature of −10° C. to 50° C. | 08-22-2013 |
| 20130251619 | AGGREGATED THREAD STRUCTURE, PRODUCTION METHOD THEREOF, AND ELECTRIC WIRE USING THE SAME - A method for producing an aggregated thread structure includes (a) a process of dispersing carbon nanotube to a first solvent, which is water or a mixed solvent containing organic solvent and water, with a surfactant, to create a dispersion and (b) a process of injecting the dispersion, in which carbon nanotube is dispersed, to a condensing liquid, which is a second solvent that differs from the first solvent, to thereby aggregate and spin carbon nanotube. The aggregated thread structure containing carbon nanotube has: a bulk density of 0.5 g/cm | 09-26-2013 |
| 20130302238 | CONTINUOUS MANUFACTURING APPARATUS AND METHOD FOR CARBON NANOTUBES HAVING GAS SEPARATION UNITS - The present invention relates to a continuous manufacturing apparatus for a carbon nanotube having gas separation units and a continuous manufacturing method for a carbon nanotube using the same, and more specifically, to a continuous manufacturing apparatus for a carbon nanotube having gas separation units and a continuous manufacturing method for a carbon nanotube using the same, in which the apparatus includes i) a reactor for synthesizing the carbon nanotube; ii) a separator for separating a mixed gas and the carbon nanotube transferred from the reactor; iii) a gas separation unit including more than one polymer membrane for removing in part or in whole of more than one component gas from the mixed gas separated; and iv) a recirculation pipe for recirculating the mixed gas without in part or in whole of the component gas to the reactor of carbon nanotube. According to the present invention, the present invention has an effect to provide the continuous manufacturing apparatus of the carbon nanotube and continuous manufacturing method using the same, in which it makes possible to perform a rapid processing; has excellent productivity and excellent conversion rate of carbon source; can significantly reduce the cost of production; can reduce energy consumption because a reactor size can be decreased as compared with capacity; and has a gas separation unit that not generate a waste gas. | 11-14-2013 |
| 20130343982 | PROCESS FOR MAKING MULTI-WALLED CARBON NANOTUBES AND MULTI-WALLED CARBON NANOTUBES FORMED THEREFROM - A process for making multi-walled carbon nanotubes includes contacting a hydrocarbon-containing gas with an electron beam-treated fly ash catalyst. The electron beam-treated fly ash catalyst contains a total amount of iron oxide and vanadium oxide of up to 5 wt. %. The multi-walled carbon nanotubes may be formed in a low pressure chemical vapor deposition apparatus. | 12-26-2013 |
| 20140023581 | RECYCLING CARBON FIBERS FROM EPOXY USING SOLVENT CRACKING - Methods of extracting recycling carbon fibers are provided. Method of extracting and recycling carbon fibers with furan-2-carbaldehyde are provided and systems for performing the same are also provided. Compositions comprising resin composites, carbon fibers, and/or furan-2-carbaldehyde are also provided. | 01-23-2014 |
| 20140030183 | CARBON NANOTUBE MANUFACTURING METHOD - Carbon nanotubes (CNTs) having a desired diameter are selectively produced by reacting a carbon source with a cyclic compound in which multiple aromatic rings are continuously bonded. The reaction is preferably performed by supplying a gaseous carbon source under reduced pressure and heating. The cyclic compound in which multiple aromatic rings are continuously bonded is preferably a cyclic compound in which bivalent aromatic hydrocarbon groups are continuously bonded, or a modified cycloparaphenylene compound in which a cycloparaphenylene compound or at least one phenylene group of the cycloparaphenylene compound is substituted with a condensed cyclic group such as a naphthylene group. | 01-30-2014 |
| 20140037533 | HIGH MODULUS GRAPHITE FIBER AND MANUFACTURING METHOD THEREOF - A high modulus graphite fiber with a tensile modulus of 270˜650 GPa and a plurality of crystal structures with a thickness (Lc) of 20˜70 angstroms is disclosed. Carbon fiber is used as a raw material, and a microwave focusing method is used to perform an ultra quick high temperature graphitization process to increase the temperature of the carbon fiber at a heating speed of 10˜100° C. per minute to a graphitization temperature of 1400˜3000° C., and then to perform a quick graphitization process for 0.5˜10 minutes to form the high modulus graphite fiber. | 02-06-2014 |
| 20140056800 | High Purity Carbon Nanotube, Process For Preparing The Same And Transparent Conductive Film Using The Same | 02-27-2014 |
| 20140072505 | Layered multiphase catalyst supports and carbon nanotubes produced thereon - The present invention is related to layered multiphase catalyst supports and to their use for production of helical carbon nanotubes. The metal(s) catalysts are deposited either by impregnation or by precipitation. | 03-13-2014 |
| 20140120027 | CONDUCTIVE FILM FORMATION METHOD, CONDUCTIVE FILM, INSULATION METHOD, AND INSULATION FILM - The object of the present invention is to provide a high-resolution conductive pattern. A conductive film formation method for forming a conductive film in a prescribed pattern comprises: a step in which a conductive carbon nanotube layer is formed; and an ultraviolet ray irradiation step in which areas of the conductive carbon nanotube layer formed in the above step, other than parts corresponding to the prescribed pattern, are irradiated with ultraviolet rays. Conductive carbon nanotubes in the ultraviolet ray irradiation areas turn insulating. Conductive carbon nanotubes in ultraviolet ray non-irradiation areas retain their conductive property. | 05-01-2014 |
| 20140127122 | FUGITIVE VISCOSITY AND STABILITY MODIFIERS FOR CARBON NANOTUBE COMPOSITIONS - The invention is directed to carbon nanotube-containing compositions that have increased viscosity and stability. In particular, the invention is directed to methods for manufacturing carbon nanotube films and layers that provide superior electrical properties. | 05-08-2014 |
| 20140147372 | NANOSTRUCTURES PATTERNED BY ELECTROSTATIC PRINTING - An electrostatic printing method such as laser printing can be employed for cost-effective and scalable patterning of nanostructure growth catalysts onto growth substrates, either directly or via one or more transfer substrates. Particles comprising a nanostructure growth catalyst are deposited onto the substrate in an electrostatically defined growth pattern. Another aspect of the method includes pressing a mixture of a nanostructure growth catalyst and a binder against the substrate to bond the mixture to the substrate. Nanostructures are grown from the deposited pattern in known nanostructure growth environments. The method allows a user to define a nanostructure growth pattern using familiar, user-friendly computer programs such as word processors, CAD, or other graphics software. Carbon nanotube forests can be grown from magnetic ink character recognition (MICR) toner printed on or transferred to the substrate. | 05-29-2014 |
| 20140193323 | Double Wall Carbon Nanotubes and Method for Manufacturing Same - The present invention relates to a method for manufacturing carbon nanotubes comprising: a preparatory step of a supported catalyst; a temperature-raising step of inserting the supported catalyst into a reactor, injecting hydrocarbon gas and hydrogen gas at the same time, and raising the temperature of the reactor to between 900 to 1000° C. to synthesize carbon nanotubes; and a temperature-lowering step of lowering the temperature of the reactor to between a room temperature to 200° C., injecting only hydrogen gas, and synthesizing carbon nanotubes. The carbon nanotubes manufactured by the above method have high purity, and excellent selectivity for double wall carbon nanotubes can be achieved. | 07-10-2014 |
| 20140199229 | COMPOSITIONS, METHODS, AND SYSTEMS FOR SEPARATING CARBON-BASED NANOSTRUCTURES - The present invention generally relates to compositions, methods, and systems for separating carbon-based nanostructures. | 07-17-2014 |
| 20140219909 | METHOD FOR PRODUCING A LIGNIN FIBER - Disclosed is a method of producing a continuous lignin fiber from softwood and/or hardwood alkali lignin. The lignin fiber can be further treated to obtain structural carbon fiber. | 08-07-2014 |
| 20140234199 | CARBON FIBER MANUFACTURING METHOD AND CARBON FIBER - Provided is a carbon fiber manufacturing method including a surface treatment step of ejecting an ozone solution in which ozone is dissolved in solvent from a fluid ejecting port toward a carbon fiber bundle and causing the ozone solution to pass between single fibers of the carbon fiber bundle so as to contact surfaces of the single fibers so that the surfaces of carbon fibers are treated by the ozone solution. Also, provided is a carbon fiber subjected to a surface treatment by the carbon fiber manufacturing method. | 08-21-2014 |
| 20140241974 | CARBON NANOFIBERS ENCAPSULATING METAL COBALT, AND PRODUCTION METHOD THEREFOR - This carbon nanofiber is produced by a vapor phase reaction of a carbon oxide-containing raw material gas using a friend oxide powder including a Co oxide as a catalyst, wherein at least one type selected from metal cobalt, carbon-containing cobalt metals, and cobalt-carbon compounds is contained (encapsulated) in the fiber in a wrapped state. This method for producing a carbon nanofiber includes: producing a carbon nanofiber by, a vapor phase reaction of a carbon oxide-containing raw material gas using a mixed powder of a Co oxide and a Mg oxide as a catalyst, wherein a mixed powder of CoO and MgO, which is obtained by hydrogen-reducing a mixed powder of Co | 08-28-2014 |
| 20140255291 | LIQUID CRYSTALS FROM SINGLE-WALLED CARBON NANOTUBE POLYELECTROLYTES AND THEIR USE FOR MAKING VARIOUS MATERIALS - In some embodiments, the present disclosure pertains to methods of forming a solution of single-walled carbon nanotube polyelectrolytes in a liquid crystalline phase. In some embodiments, such methods comprise: (a) providing single-walled carbon nanotube polyelectrolytes; and (b) mixing the single-walled polyelectrolytes with a polar aprotic solvent to form a mixture, where the mixing results in the formation of single-walled carbon nanotubes in the liquid crystalline phase. In some embodiments, the polar aprotic solvent comprises crown ether. In some embodiments, the present disclosure pertains to a method of making single-walled carbon nanotube fibers. Further embodiments of the present disclosure pertain to a method of making a single walled carbon nanotube composite. In some embodiments, the present disclosure pertains to an article comprising neat aligned carbon nanotubes. | 09-11-2014 |
| 20140271442 | POLYMER DERIVED FROM ACRYLONITRILE - This invention relates to poly(acrylonitrile) homo- or co-polymer having a number average molecular weight (M | 09-18-2014 |
| 20140271443 | High Glass Transition Lignins and Lignin Derivatives for the Manufacture of Carbon and Graphite Fibers - High glass transition temperature lignin derivatives and methods of making the same are disclosed herein. In addition, methods for making carbon nanofibers from the lignin derivatives is also provided. The lignin derivatives disclosed herein are suitable for electrospinning and provide increased efficiency in production of carbon nanofibers. The lignin derivatives may be obtained using the methods disclosed herein from pulping processes conducted on lignin stock material. | 09-18-2014 |
| 20140301934 | PYROLYSIS AND GASIFICATION SYSTEMS, METHODS, AND RESULTANTS DERIVED THEREFROM - A process and system for the controlled thermal conversion of a carbonaceous feedstock, including: exposing the feedstock to one or more predetermined temperatures and one or more predetermined pressures for one or more predetermined amounts of time in one or more chambers to produce a gas product and a solid product, wherein the gas product includes one or more of methane, Carbon monoxide, Hydrogen, and one or more noxious chemicals and the solid product includes Carbon and Carbon nano-structures; sequestration enabling at least a portion of the Carbon by creating associated Lewis Acid Sites; sequestering at least one of the one or more noxious chemicals in the one or more chambers using the sequestration enabled Carbon; and controlling the constituents of the gas product using feedback, thereby providing a predictable and stable gas product from an unknown and/or variable feedstock and communicating data via SmartGrid communications protocols. | 10-09-2014 |
| 20140308195 | [N]CYCLOPARAPHENYLENES (CCP), [N]MACROCYCLE INTERMEDIATES AND METHODS OF MAKING SAME - The present invention provides the compound [6]-cycloparaphenylene, cycloparaphenylene intermediates (e.g. [n]macrocycles), and methods for making [n]cycloparaphenylenes and [n]cycloparaphenylene intermediates in quantities not previously available. The cycloparaphenylene compounds and their intermediates can be useful in nanotube preparation and in the preparation of other supramolecular structures. | 10-16-2014 |
| 20150017087 | CARBON FIBER AND CATALYST FOR MANUFACTURE OF CARBON FIBER - Carbon fibers containing at least one element (I) selected from the group consisting of Fe, Co and Ni, at least one element (II) selected from the group consisting of Sc, Ti, V, Cr, Mn, Cu, Y, Zr, Nb, Tc, Ru, Rh, Pd, Ag, a lanthanide, Hf, Ta, Re, Os, Ir, Pt and Au, and at least one element (III) selected from the group of W and Mo, wherein the element (II) and the element (III) each is 1 to 100 mol % relative to the mols of element (I). | 01-15-2015 |
| 20150037239 | DISPERSION AND RETRIEVAL OF DE-BUNDLED NANOTUBES - A method for dispersing nanotubes, comprising forming a nanocomposite solution with associated nanotubes and nanoplatelets, mixing a surfactant to the nanocomposite solution, separating the nanocomposite in solution, wherein the nanotubes remain suspended in the surfactant solution, and isolating the nanotubes in solution. In certain instances, the method further comprises functionalizing the nanotubes in solution. | 02-05-2015 |
| 20150050208 | Enzyme-Mediated Assimilation of DNA-Functionalized Single-Walled Carbon Nanotubes (SWNTs) - Select embodiments of the present invention employ biological means to direct assemble CNT-based nanostructures, allowing for scaling to macrostructures for manufacture. In select embodiments of the present invention, a method is provided for assembling DNA-functionalized SWNTs by phosphodiester bonding catalyzed by ssDNA-ligase to form macroscopic CNT aggregates. | 02-19-2015 |
| 20150093322 | METHOD FOR PURIFYING MULTI-WALLED CARBON NANOTUBES - A method comprising adding a multi-walled carbon nanotube synthesized by the vapor phase process to a nitric acid aqueous solution of not lower than 0.2 mol/L so as to dissolve a catalyst metal present in the multi-walled carbon nanotube, performing solid-liquid separation to isolate solid matter, and subjecting the isolated solid matter to heat treatment at a temperature higher than 150° C. gives a purified multi-walled carbon nanotube in which the amount of a metallic element left in the multi-walled carbon nanotube originating the catalyst metal is not smaller than 1000 ppm and not larger than 8000 ppm determined by ICP optical emission spectrometry and the amount of an anion left in the multi-walled carbon nanotube originating in the acid is smaller than 20 ppm determined by ion chromatography analysis. | 04-02-2015 |
| 20150110704 | Method for Preparing Carbon Nanotube Fibers with Improved Spinning Properties Using Surfactant - The present invention provides a method for preparing carbon nanotube fibers with improved spinning properties using a surfactant and carbon nanotube fibers prepared by the method. According to the method for preparing carbon nanotube fibers of the present invention, the addition of a surfactant during the preparation of carbon nanotubes interrupts and delays the agglomeration of catalyst particles, which reduces the size of the catalyst particles and uniformly disperses the catalyst particles that play a key role in the formation of carbon nanotube fibers, thus increasing the strength and conductivity of carbon nanotube fibers and improving the spinning properties. While convention methods prepare carbon nanotube fibers by injecting a catalytic material for the synthesis of carbon nanotubes in a high-pressure supercritical state to be uniformly dispersed, the present invention uses a dispersant and thus does not require the injection in a high-pressure supercritical state. | 04-23-2015 |
| 20150118141 | DRY-JET WET SPUN CARBON FIBERS AND PROCESSES FOR MAKING THEM USING A NUCLEOPHILIC FILLER/PAN PRECURSON - Carbon fibers made by a process using an organogel precursor that includes a nucleophilic filler and polyacrylonitrile; such a process which includes dry-jet wet spinning; and an article made from such carbon fibers. | 04-30-2015 |
| 20150118142 | FORMATION OF CARBON NANOTUBE-ENHANCED FIBERS AND CARBON NANOTUBE-ENAHNCED HYBRID STRUCTURES - Carbon fibers made by a process using a precursor that is a CNT/PAN material blend including CNTs functionalized with a nucleophilic material; and carbon fibers made with such a process. | 04-30-2015 |
| 20150125380 | CARBON NANOTUBES AND METHODS OF FORMING SAME AT LOW TEMPERATURE - In one aspect of the invention, a method for growth of carbon nanotubes includes providing a graphitic composite, decorating the graphitic composite with metal nanostructures to form graphene-contained powders, and heating the graphene-contained powders at a target temperature to form the carbon nanotubes in an argon/hydrogen environment that is devoid of a hydrocarbon source. In one embodiment, the target temperature can be as low as about 150° C. (±5° C.). | 05-07-2015 |
| 20150132212 | METHOD FOR FORMING CONFORMAL CARBON FILMS, STRUCTURES AND DEVICES INCLUDING A CONFORMAL CARBON FILM, AND SYSTEM OF FORMING SAME - Methods of forming carbon films, structures and devices including the carbon films, and systems for forming the carbon films are disclosed. A method includes depositing a metal carbide film using atomic layer deposition (ALD). Metal from the metal carbide film is removed from the metal carbide film to form a carbon film. Because the films are formed using ALD, the films can be relatively conformal and can have relatively uniform thickness over the surface of a substrate. | 05-14-2015 |
| 20150292118 | METHOD FOR MANUFACTURING A CARBON FIBRE, PRECURSOR MATERIAL USED BY THE METHOD AND CARBON FIBRE OBTAINED - A method for manufacturing a continuous carbon fiber from a precursor material. According to this method, a precursor material including a continuous natural fiber and carbon nanofillers is used, said natural fiber being obtained from at least one plant constituent such as a cellulose. A process for manufacturing a continuous carbon fiber from a precursor material, including a step of carbonization of said precursor material, in which the precursor material includes a continuous natural fiber and carbon nanofillers, said natural fiber being obtained from at least one plant constituent, wherein it also includes a step of sizing the precursor material before the carbonization step. | 10-15-2015 |
| 20150298974 | METHOD FOR CONTROLLING BULK DENSITY OF CARBON NANOTUBE AGGLOMERATE - The present invention relates to a method for producing a carbon nanotube aggregate whose bulk density is easily controllable. Therefore, the present invention provides a carbon nanotube aggregate suitable for use in various fields. | 10-22-2015 |
| 20150322593 | Precursor Fiber for Carbon Fibers, Carbon Fiber, and Method for Producing Carbon Fiber - To provide a carbon fiber precursor fiber that can efficiently produce a carbon fiber excellent in mechanical strength without an infusibilization treatment; a carbon fiber; and a method for producing the carbon fiber. | 11-12-2015 |
| 20160016345 | POLYACRYLONITRILE/CELLULOSE NANO-STRUCTURE FIBERS - In a method of making a carbon fiber, polyacrylonitrile is dissolved into a first solvent, thereby generating a first solution. A plurality of cellulose nano-structures is dispersed in a second solvent, thereby generating a first suspension. The first suspension is mixed with the first solution, thereby generating a first mixture. The first mixture is spun so as to draw fibers from the first mixture. The fibers are stabilized and then the fibers are carbonized. A fiber includes an elongated carbonized polyacrylonitrile matrix. A plurality of carbonized cellulose nano-structures is in the carbonized polyacrylonitrile matrix. | 01-21-2016 |
| 20160016801 | Self Assembling Beta-Barrel Proteins Position Nanotubes - The present invention relates to the extraordinary properties of recently discovered nanotubes. This disclosure teaches a method for using barrel proteins acting as scaffolds to guide assembly of nanotubes, and using nano-molecular molding jigs to format the nanotubes into stable arrays with the precise geometric architecture desired. This disclosure teaches nanotube technology with principles of protein folding and aggregated self-assembly. In certain embodiments, the disclosure teaches using highly modified barrel proteins to form hydrophobic and hydrophilic channels that guide the nanotubes into their centers, or other geometric patterns utilizing silicone aerogel to form nano-molecular molds, jigs, and surfaces to position nanotubes in precise geometric arrangements and arrays. This disclosure teaches new uses of barrel proteins as self-assembling molding tools to develop new nanometer scaled devices and their uses herein. | 01-21-2016 |
| 20160017537 | OXIDIZED GRAPHITE AND CARBON FIBER - A mechanochemical oxidation process that allows relatively benign oxidizers to be used for the production of at least partially oxidized graphite, and a method of preparing a carbon fiber using oxidized graphite and a fiber component. Partially oxidized graphite is fully dispersible in water and can be used to prepare thin films with conductivities rivaling pure graphite. This offers the potential for improved electronic displays, solar cells, and lithium ion batteries. A carbon nanotube and a method of making the same is also provided. | 01-21-2016 |
| 20160023905 | CARBON NANO-TUBE PRODUCTION FROM CARBON DIOXIDE - Disclosed is a method for making carbon nanotubes comprising (a) reducing a nickel containing catalyst with a reducing agent in a first reaction chamber, (b) contacting the nickel containing catalyst with carbon dioxide under conditions sufficient to produce a reaction product, (c) transferring the reaction product to a second reaction chamber, wherein the second reaction chamber comprises a Group VIII metal containing catalyst, and (d) contacting the Group VIII metal containing catalyst with the reaction product under conditions sufficient to produce carbon nanotubes, wherein the first and second reaction chambers are in flow connection during the transfer step (c), wherein the only source of carbon used to form the carbon nanotubes is from the carbon dioxide used in step (b), and wherein at least 20% of the carbon from the carbon dioxide used in step (b) is converted into carbon nanotubes. | 01-28-2016 |
| 20160024232 | POLYMER DERIVED FROM ACRYLONITRILE - This invention relates to poly(acrylonitrile) homo- or co-polymer having a number average molecular weight (Mn) of at least 200,000 g/mol and a dispersity ( | 01-28-2016 |
| 20160039678 | METHODS FOR SYNTHESIS OF GRAPHENE DERIVATIVES AND FUNCTIONAL MATERIALS FROM ASPHALTENES - Embodiments described are directed to methods for the functionalization of asphaltene materials and to compositions made from functionalized asphaltenes. Disclosed is a method for synthesizing graphene derivatives, such as 2D single crystalline carbon allotropes of graphene and functional materials, such as sulfonic acid and its derivatives. Also disclosed is a method for the transformation of asphaltene into a source of graphene derivatives and functional materials, such as, 0D, 1D, 2D and combinations of 0D and 1D by utilizing chemical substitution reaction mechanism, such as, electrophilic aromatic substitution, nucleophilic aromatic substitution and Sandmeyer mechanism. Also disclosed are novel graphene materials comprising: acetylenic linkage and hydrogenated graphene. These novel materials, which may be produced by these methods, include, e.g.: 2D single crystalline carbon allotropes of graphene with asymmetric unit formulas C | 02-11-2016 |
| 20160083257 | DRAWN CARBON NANOTUBE YARN AND PRODUCTION METHOD THEREFOR - An object of the present invention is to provide a CNT yarn having excellent conductivity and strength, and a method for producing the same. The present invention provides a drawn yarn comprising carbon nanotubes and having a drawing rate of 10 to 50%. | 03-24-2016 |
| 20160153121 | FLAME RESISTANT POLYMER, POLYMER SOLUTION, FLAME RESISTANT FIBER, CARBON FIBER, AND METHODS OF PRODUCING SAME | 06-02-2016 |
| 20160160394 | METHOD FOR PRODUCING AN EFFICIENT CATALYST FOR GENERATING MULTI-WALLED CARBON NANOTUBES, MULTI-WALLED CARBON NANOTUBES AND CARBON NANOTUBE - The invention relates to a method for producing a catalyst for the synthesis of multi-walled carbon nanotubes. The invention also relates to a method for producing multi-walled carbon nanotubes and a carbon nanotube powder with improved properties and comprising said carbon nanotubes. | 06-09-2016 |
| 20160200577 | HIGH STRENGTH CARBON NANOTUBE PLASMA-TREATED FIBERS & METHODS OF MAKING | 07-14-2016 |
| 20160201227 | Porous Carbon Nanofibers And Manufacturing Thereof | 07-14-2016 |
| 20160376151 | PARTIALLY CYCLIZED POLYACRYLONITRILE POLYMER, POLYACRYLONITRILE FLAME-RESISTANT POLYMER, POLYACRYLONITRILE FLAME-RESISTANT FIBER, CARBON FIBER, AND PREPARATION METHODS THEREOF - A high-quality flame-resistant fiber and carbon fiber at low costs in preparing a flame-resistant fiber and a carbon fiber by efficiently performing a flame retardation process in a short time as compared with a conventional technology are described. [1] If a polyacrylonitrile (PAN) polymer is degenerated with an oxidizing agent containing a thiolate compound and a nitrogen atom in a polymer, and the degenerated polymer is formed into threads so as to prepare a flame-resistant PAN fiber. [2] A flame-resistant PAN fiber is prepared by degenerating a PAN precursor fiber in a solution including a thiolate compound and an oxidizing agent containing a nitrogen atom. The flame-resistant PAN fiber obtained by the preparation method is heated at 300° C. or more to 3000° C. or less, and, thus, a carbon fiber having an excellent mechanical strength can be obtained. | 12-29-2016 |
