Patent application number | Description | Published |
20090124747 | CONDENSATION POLYMERS HAVING COVALENTLY BOUND CARBON NANOTUBES - The present disclosure describes carbon nanotube materials and condensation polymers having at least one bridge between carbon nanotubes. Carbon nanotube materials comprise a plurality of functionalized single-wall carbon nanotubes linked to at least one other single-wall carbon nanotube by at least one bridge. The at least one bridge comprises at least one amine functionality bonded to the functionalized single-wall carbon nanotubes. The amine functionality may be alkyl or aryl. Carbon nanotube condensation polymers having at least one bridge between single-wall carbon nanotubes are also disclosed. The bridges in the condensation polymers comprise an amine functionality and a condensation agent. | 05-14-2009 |
20100047575 | Nanotube-amino acids and methods for preparing same - The present invention is directed toward compositions comprising carbon nanotubes (CNTs) that are sidewall-functionalized with amino acid groups, and to amino acid compositions comprising carbon nanotubes. The present invention is also directed to simple and relatively inexpensive methods for the preparation of such compositions. Such compositions are expected to greatly extend the bio-medical applications of CNTs. | 02-25-2010 |
20100113696 | METHODS FOR PREPARING CARBON NANOTUBE/POLYMER COMPOSITES USING FREE RADICAL PRECURSORS - In some embodiments, the present invention is directed to methods of fully integrating CNTs and the surrounding polymer matrix in CNT/polymer composites. In some such embodiments, such integration comprises interfacial covalent bonding between the CNTs and the polymer matrix. In some such embodiments, such interfacial covalent bonding is provided by a free radical reaction initiated during processing. In some such embodiments, such free radical initiation can be provided by benzoyl peroxide. In some or other embodiments, the present invention is directed to CNT/polymer composite systems, wherein the CNTs within such systems are covalently integrated with the polymer. In some or other embodiments, the present invention is directed to articles of manufacture made from such CNT/polymer composite systems. | 05-06-2010 |
20100143230 | METHOD FOR PREPARATION OF NEW SUPERHARD B-C-N MATERIAL AND MATERIAL MADE THEREFROM - According to some embodiments, a method of preparing a superhard material involves using mixtures of boron with carbon nitride of C | 06-10-2010 |
20100143701 | Fiber-Reinforced Polymer Composites Containing Functionalized Carbon Nanotubes - The present invention is directed to methods of integrating carbon nanotubes into epoxy polymer composites via chemical functionalization of carbon nanotubes, and to the carbon nanotube-epoxy polymer composites produced by such methods. Integration is enhanced through improved dispersion and/or covalent bonding with the epoxy matrix during the curing process. In general, such methods involve the attachment of chemical moieties (i.e., functional groups) to the sidewall and/or end-cap of carbon nanotubes such that the chemical moieties react with either the epoxy precursor(s) or the curing agent(s) (or both) during the curing process. Additionally, in some embodiments, these or additional chemical moieties can function to facilitate dispersion of the carbon nanotubes by decreasing the van der Waals attractive forces between the nanotubes. | 06-10-2010 |
20100222536 | Method for Functionalizating Carbon Naontubes Utilizing Peroxides - A method for functionalizing the wall of single-wall or multi-wall carbon nanotubes involves the use of acyl peroxides to generate carbon-centered free radicals. The method allows for the chemical attachment of a variety of functional groups to the wall or end cap of carbon nanotubes through covalent carbon bonds without destroying the wall or endcap structure of the nanotube. Carbon-centered radicals generated from acyl peroxides can have terminal functional groups that provide sites for further reaction with other compounds. Organic groups with terminal carboxylic acid functionality can be converted to an acyl chloride and further reacted with an amine to form an amide or with a diamine to form an amide with terminal amine. The reactive functional groups attached to the nanotubes provide improved solvent dispersibility and provide reaction sites for monomers for incorporation in polymer structures. The nanotubes can also be functionalized by generating free radicals from organic sulfoxides. | 09-02-2010 |
20100234503 | POLYMER COMPOSITES MECHANICALLY REINFORCED WITH ALKYL AND UREA FUNCTIONALIZED NANOTUBES - A polymer composite includes a polymer matrix and an alkyl-substituted carbon nanotube. A polymer composite also includes a polymer matrix and a fluorinated carbon nanotube reacted with urea, thiourea, or guanidine. A method of functionalizing a carbon nanotube includes heating a fluorinated carbon nanotube urea, thiourea, or guanidine. A substituted carbon nanotube includes a fluorinated carbon nanotube and amino silane compounds The amino silane compounds covalently link to the fluorinated nanotube through the amino functional group. Polymer composites, ceramics and surface coating materials may be constructed from these substituted carbon nanotubes. | 09-16-2010 |
20100317820 | Polyol Functionalized Water Soluble Carbon Nanostructures - A method of making a water soluble carbon nanostructure includes treating a fluorinated carbon nanostructure material with a polyol in the presence of a base. A water soluble carbon nanostructure comprises a fluorinated carbon nanostructure covalently bound to a polyol. Exemplary uses of water soluble carbon nanostructures include use in polymer composites, biosensors and drug delivery vehicles. | 12-16-2010 |
20110065946 | FLUORINATED NANODIAMOND AS A PRECURSOR FOR SOLID SUBSTRATE SURFACE COATING USING WET CHEMISTRY - The present invention is directed to nanodiamond (ND) surface coatings and methods of making same. Such coatings are formed by a covalent linkage of ND crystals to a particular surface via linker species. The methods described herein overcome many of the limitations of the prior art in that they can be performed with standard wet chemistry (i.e., solution-based) methods, thereby permitting low temperature processing. Additionally, such coatings can potentially be applied on a large scale and for coating large areas of a variety of different substrates. | 03-17-2011 |
20120032116 | METHOD OF PRODUCING DIAMOND POWDER AND DOPED DIAMONDS - A method for producing a diamond material by contacting a fluorinated precursor with a hydrocarbon in a reactor and forming a combination in the absence of a metal catalyst; increasing the pressure of the reactor to a first pressure; heating the combination under pressure to form a material precursor; cooling the material precursor; and forming a diamond material. | 02-09-2012 |
20140060811 | DOWNHOLE ELASTOMERIC COMPONENTS INCLUDING BARRIER COATINGS - An apparatus for performing a downhole operation includes: a carrier configured to be disposed in a borehole in an earth formation; and a deformable component configured to be disposed in the borehole, the deformable component including an elastomeric material and a barrier coating disposed on a surface of the elastomeric material, the barrier coating having properties configured to resist permeation of downhole gases into the elastomeric material at downhole temperatures. | 03-06-2014 |
20140246250 | METHODS OF FABRICATING POLYCRYSTALLINE DIAMOND BY FUNCTIONALIZING DIAMOND NANOPARTICLES, GREEN BODIES INCLUDING FUNCTIONALIZED DIAMOND NANOPARTICLES, AND METHODS OF FORMING POLYCRYSTALLINE DIAMOND CUTTING ELEMENTS - Method of fabricating polycrystalline diamond include functionalizing surfaces of diamond nanoparticles with fluorine, combining the functionalized diamond nanoparticles with a polymer to form a mixture, and subjecting the mixture to high pressure and high temperature (HPHT) conditions to form inter-granular bonds between the diamond nanoparticles. A green body includes a plurality of diamond nanoparticles functionalized with fluorine, and a polymer material interspersed with the plurality of diamond nanoparticles. A method of forming cutting element includes functionalizing surfaces of diamond nanoparticles with fluorine, and combining the functionalized diamond nanoparticles with a polymer to form a mixture. The mixture is formed over a body, and the mixture and the body are subjected to HPHT conditions to form inter-granular bonds between the diamond nanoparticles and secure the bonded diamond nanoparticles to the body. | 09-04-2014 |
20150076335 | COMPOSITE HIGH TEMPERATURE GAMMA RAY DETECTION MATERIAL FOR WELL LOGGING APPLICATIONS - An apparatus for detecting a gamma-ray includes: a gamma-ray detection material comprising a material transparent to light having a plurality of nano-crystallites where each nano-crystallite in the plurality has as periodic crystal structure with a diameter or dimension that is less than 1000 nm and includes (i) a heavy atom having an atomic number greater than or equal to 55 that emits an energetic electron upon interacting with an incoming gamma-ray and (ii) and an activator atom that provides for scintillation upon interacting with the energetic electron to emit light photons wherein the heavy atom and the activator atom have positions in the periodic crystal structure of each nano-crystallite in the plurality; and a photodetector optically coupled to the gamma-ray detection material and configured to detect the light photons emitted from the scintillation and to provide a signal correlated to the detected light photons. | 03-19-2015 |