Patent application number | Description | Published |
20080199696 | CARBON NANO TUBE ELECTRODE FORMED BY DIRECTLY GROWING CARBON NANO TUBE ON SURFACE OF CARBON PAPER AND SUPPORTING PLATINUM-BASED NANO CATALYST ON CARBON NANO TUBE USING CVD METHOD AND MANUFACTURING METHOD THEREOF - A platinum-based nano catalyst supported carbon nano tube electrode and a manufacturing method thereof, more particularly to a manufacturing method of a carbon nano tube electrode and a carbon nano tube electrode supported with the platinum-based catalyst by growing the carbon nano tube on the surface of the carbon paper and using a CVD method on the surface of the carbon nano tube. By growing the carbon nano tube directly, the broad surface area and excellent electric conductivity of the carbon nano tube can be utilized maximally, and especially, the nano catalyst particles with minute sizes on the surface of the carbon nano tube by using the CVD method as a supporting method of the platinum-based catalyst on the surface of the carbon nano tube, the amount of the platinum can be minimized and still shows an efficient catalyst effect and by improving the catalyst activity by increasing the distribution, so academic and industrial application in the future is highly expected. | 08-21-2008 |
20080224476 | PORTABLE POWER PACK, FUEL/AIR SUPPLY FOR THE PORTABLE POWER PACK, UNIFLOW SCAVENGING MICRO-ENGINE FOR THE PORTABLE POWER PACK AND OPERATION METHOD THEREOF - A small portable power pack includes a fuel/air supply for mixing fuel, which is supplied from outside, with outside air, thereby providing mixed gas; a uniflow scavenging micro-engine for receiving mixed gas from the fuel/air supply and igniting mixed gas to explode; a control panel for operating and controlling the uniflow scavenging micro-engine; a capacitor battery for powering the control panel and the uniflow scavenging micro-engine. The portable power pack is easily carried and used without the restriction of spaces and sites. | 09-18-2008 |
20090068545 | METHOD OF MANUFACTURING CELLULOSE ELECTRODE FOR FUEL CELLS, CELLULOSE ELECTRODE MANUFACTURED THEREBY, AND USE OF CELLULOSE FIBERS AS FUEL CELL ELECTRODES - Disclosed is a novel cellulose electrode having high performance, which is capable of substituting for carbon paper used as a conventional fuel cell electrode. A method of manufacturing the cellulose electrode includes cutting cellulose fibers to a predetermined length and binding the fibers, or directly weaving the fibers, thus producing a cellulose sheet, directly growing carbon nanotubes on the cellulose sheet, and supporting a platinum nano-catalyst on the surface of the carbon nanotubes using chemical vapor deposition. An electrode including the cellulose fibers and use of cellulose fibers as fuel cell electrodes are also provided. As a novel functional material for fuel cell electrodes, porous cellulose fibers having micropores are used, thereby reducing electrode manufacturing costs and improving electrode performance. | 03-12-2009 |
20090074633 | Microtubular honeycomb carbon material obtained by heat-treating cellulose fiber, production method of thereof, microtubular reactor module comprising the microtubular honeycomb carbon material and method for producing the microtubular reactor module - Disclosed herein are a microtubular honeycomb carbon material obtained by heat-treating cellulose fiber, a production method thereof, a microtubular reactor module fabricated using the microtubular honeycomb carbon, a method for producing the microtubular reactor module, and a microcatalytic reactor system comprising the microtubular reactor module. A carbon material having a new structure is produced by heat-treating cellulose fiber, and a catalytic reactor system having a new structure is constructed by coating the surface of the carbon material with a metal catalyst. Cellulose carbide, used as the reactor material, is very simple to produce. Because it has a micro honeycomb structure having a large number of microchannels and a large number of mesopores, it can be loaded with a large amount of a catalyst compared to the prior material having the same area, and thus it is useful as a catalyst support, and the reaction efficiency can be maximized. Also, the microcatalytic reactor system can be used in applications including very small steam reformer systems that use biomass fuel such as ethanol, fuel cell reactor systems, VOC and low-concentration-hydrogen treatment systems operable below 200 □, micro heat exchangers, and natural gas reformer systems. Thus, the invention is a useful, industrially applicable invention. | 03-19-2009 |
20090246511 | CELLULOSE CARBIDE MATERIAL HAVING GRAPHITE NANOLAYER AND SYNTHESIS METHOD THEREOF - Disclosed herein is a cellulose carbide material having a graphite nanosized surface layer directly carbonized from a cellulose fiber, and a method of synthesizing a cellulose carbide material having a graphite nanolayer on a surface thereof, including: i) heating a cellulose fiber in a reactor; ii) forming a primary carbide while maintaining temperature of the reactor; iii) cooling the formed primary carbide; iv) heating the cooled primary carbide; v) forming a secondary carbide while maintaining temperature of the reactor; vi) cooling the formed secondary carbide. | 10-01-2009 |
20100298125 | CARBON NANOTUBE CATALYSTS HAVING METAL CATALYST NANO-PARTICLES SUPPORTED ON INNER CHANNEL OF CARBON NANOTUBE AND PREPARATION METHOD THEREOF - A carbon nanotube catalyst wherein metal catalyst nanoparticles are selectively supported only on the inner channel surface of the carbon nanotube, and a method for preparing the same are provided. Specifically, provided are: a carbon nanotube catalyst with supported metal catalyst nanoparticles, having excellent selective catalyst activity and durability, wherein the carbon nanotube catalyst is prepared by carrying out a specific pretreatment so as to form some defects on the inner surface of a carbon nanotube and then exposing the pretreated carbon nanotube to a flow of vapor phase metal precursors so that metal catalyst nanoparticles can be supported only on the inner channel surface of the carbon nanotube by CVD (Chemical Vapor Deposition) process; and a method for preparing the same. | 11-25-2010 |
20110027164 | METHOD AND APPARATUS FOR SYNTHESIZING CARBON NANOTUBES USING ULTRASONIC EVAPORATION - Disclosed herein is an apparatus and method for synthesizing carbon nanotubes, including a fuel supply unit for supplying a large amount of liquid metal catalyst mixture using a syringe pump for quantitatively supplying a liquid metal catalyst mixture, mixed with hydrocarbon-based liquid carbon sources such as xylene, toluene, benzene and the like, and metal catalytic particles, such as iron, nickel, cobalt, molybdenum and the like, and a general liquid pump for supplying a liquid metal catalyst mixture depending on the amount thereof; an evaporation unit for evaporating and atomizing the liquid metal catalyst mixture supplied from the fuel supply unit into precursors having a uniform size on the nanometer scale; a carrier gas supply unit for transferring particles atomized in the evaporation unit to a reactor and transferring carrier gas, having an influence on the synthesis of carbon nanotubes, to the reactor; a horizontally oriented reaction unit for synthesizing carbon nanotubes in large quantities using the carrier gas supplied from the carrier gas supply unit and the precursors formed in the evaporation unit; a filtering unit comprising a filter for filtering residual particles among the atomized particles synthesized into carbon nanotubes in the horizontally oriented reaction unit and some of the carbon nanotubes synthesized in the vapor phase; and a vacuum generation unit comprising a vacuum pump configured to be connected with the filtering unit, decrease pressure in the reactor, and remove oxygen remaining in the reactor, or a continuous collection unit in the case where the apparatus includes a vertical type reaction unit. | 02-03-2011 |
20110111948 | CATALYSTS HAVING METAL NANO-PARTICLE CATALYST SUPPORTED ON SURFACE-TREATED NATURAL CELLULOSE FIBERS AND PREPARATION METHOD THEREOF - The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions. | 05-12-2011 |
20110212293 | ECO-FRIENDLY INCOMBUSTIBLE BIOCOMPOSITE AND METHOD FOR PREPARING THE SAME - Disclosed is an eco-friendly incombustible biocomposite including: a) a polymer matrix comprising a natural fiber; and b) a ceramic sheet laminated integrally with the polymer matrix. The biocomposite is eco-friendly since the natural fiber is used as a reinforcement material and is incombustible since it is laminated integrally with the ceramic sheet. Further, it has superior storage modulus, dimensional stability and flexural properties and lightweightness, and is processable into various structures. Thus, it is very useful for automotive or building indoor/outdoor materials. | 09-01-2011 |
20120009120 | THERMAL CRACKING RESISTANT ZEOLITE MEMBRANE AND METHOD OF FABRICATING THE SAME - The present disclosure relates to a thermal cracking resistant zeolite membrane and a method of fabricating the same. The method includes dissolving an alumina-based material, a silica-based material and sodium hydroxide in water to prepare an aqueous solution, stirring the aqueous solution to form a hydrothermal solution, preparing a slurry of zeolite seeds through wet-type vibration pulverization and centrifugal separation of zeolite powder, passing the zeolite seeds through a support by vacuum filtration such that the zeolite seeds can be infiltrated into an inner region of the support ranging from a depth of 3 μm to a depth corresponding to 50% of a total thickness of the support, and immersing the support into the hydrothermal solution for hydrothermal treatment to grow a dense zeolite separation layer not only on the surface of the support but also on the inner region thereof. The zeolite membrane prevents the occurrence of thermal cracking on the zeolite separation layer, thereby providing good thermal stability and separation performance during heating and at a target processing temperature. | 01-12-2012 |
20120114941 | SYNTHESIS METHOD OF GRAPHITIC SHELL-ALLOY CORE HETEROSTRUCTURE NANOWIRES AND LONGITUDINAL METAL OXIDE HETEROSTRUCTURE NANOWIRES, AND REVERSIBLE SYNTHESIS METHOD BETWEEN NANOWIRES THEREOF - A synthesis method containing core-shell heterostructure nanowires (or lateral heterostructure nanowires) surrounding alloy in shell and longitudinal metal oxide heterostructure nanowires, and a reversible synthesis method thereof are provided. According to the present invention, core-shell heterostructure nanowires and longitudinal metal oxide nanowires comprised of various substances using the simple process can be produced in volume. | 05-10-2012 |
20120171488 | SHEETS INCLUDING FIBROUS AEROGEL AND METHOD FOR PRODUCING THE SAME - Disclosed herein is a method for producing a sheet including a silica aerogel, the method including (S1) gelling a water glass solution in a mixture of an alcohol and water to prepare a wet gel, (S2) hydrophobically modifying the surface of the wet gel with a non-polar organic solvent, an organosilane compound and an alcohol, (S3) dissolving the hydrophobically modified silica gel and a polymer in an aprotic organic solvent to prepare an electrospinning solution, and (S4) electrospinning the electrospinning solution to produce a fiber web including a silica aerogel, and a sheet in which a polymer and a silica aerogel coexist in the form of a fiber. | 07-05-2012 |
20120258308 | Single-crystal apatite nanowires sheathed in graphitic shells and synthesis method thereof - Heterogeneous nanowires having a core-shell structure consisting of single-crystal apatite as the core and graphitic layers as the shell and a synthesis method thereof are provided. More specifically, provided is a method capable of producing large amounts of heterogeneous nanowires, composed of graphitic shells and apatite cores, in a reproducible manner, by preparing a substrate including an element corresponding to X of X | 10-11-2012 |
20120277091 | Method of Preparing Catalyst Using Alkali Metal or Alkaline Earth Metal in Natural Cellulose Fibers as Co-Catalyst and Dispersant - A method of preparing a catalyst using an alkali metal or an alkaline earth metal in natural cellulose fibers as a co-catalyst and a dispersant. The catalyst is prepared using an alkali metal or an alkaline earth metal as a co-catalyst and a dispersant, thus increasing the dispersibility of catalytic components and enhancing the interactions between the catalyst and the support to thereby retard agglomeration and increase the durability of the catalyst. | 11-01-2012 |
20140024522 | CATALYSTS HAVING METAL NANO-PARTICLE CATALYST SUPPORTED ON SURFACE-TREATED NATURAL CELLULOSE FIBERS AND PREPARATION METHOD THEREOF - The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions. | 01-23-2014 |
20140099441 | METHOD FOR SYNTHESIZING CARBON NANOWIRES AT HIGH DENSITY ON SURFACE OF PORES OR GAPS IN STRUCTURE, AND HIERARCHICAL STRUCTURE SYNTHESIZED BY THE METHOD - The present invention relates to a method for synthesizing carbon nanowires directly on the internal surface of a three-dimensional structure including a carbon structure and, more particularly, to a method for synthesizing carbon nanowires at high density on the surface of pores or gaps present in a structure, and a hierarchical structure synthesized by the method. According to the present invention, it is possible to fill fine pores or gaps in a structure, which cause a reduction in mechanical properties or conductivity, with high-density carbon nanowires, thus significantly improving mechanical or electrical performance of a final product. | 04-10-2014 |
20140099718 | SINGLE-CRYSTAL APATITE NANOWIRES SHEATHED IN GRAPHITIC SHELLS AND SYNTHESIS METHOD THEREOF - Heterogeneous nanowires having a core-shell structure consisting of single-crystal apatite as the core and graphitic layers as the shell and a synthesis method thereof are provided. More specifically, provided is a method capable of producing large amounts of heterogeneous nanowires, composed of graphitic shells and apatite cores, in a reproducible manner, by preparing a substrate including an element corresponding to X of X | 04-10-2014 |
20140100104 | CARBON FIBER-REINFORCED SILICON CARBIDE COMPOSITE MATERIAL AND METHOD OF PREPARING THE SAME - The present invention provides a method of preparing a carbon fiber-reinforced silicon carbide composite material, wherein carbon nanotubes are formed in the composite material, and then metal silicon is melted and infiltrated into the composite material, so the amount of unreacted metal is reduced and the strength of the composite material is improved, and provides a carbon fiber-reinforced silicon carbide composite material prepared by the method. | 04-10-2014 |