Three dimensional macroscopic assemblages of randomly oriented carbon fibrils and composites containing same
AssigneeHyperion Catalysis Int'l., Inc.
InventorsHoward Tennent, Robert W. Hausslein, Nicholas Leventis, David Moy
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Abstract
It has now been found that highly advantageous three-dimensional, macroscopic assemblages of randomly oriented carbon fibrils can be prepared which have relatively uniform physical properties along one, preferably two and most desirably three-dimensional axis of the three-dimensional assemblage. Preferred compositions prepared according to the methods of the invention have uniform physical properties along at least one dimensional axis and have relatively isotropic physical properties in at least one plane of the assemblage and most desirably are isotropic throughout the entire three-dimensional structure.
Claims33
A composition of matter consisting essentially of a three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, being substantially free of pyrolytically deposited carbon and having a diameter ranging from about 3.5 and 70 nanometers, said assemblage having a bulk density of from 0,001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm.
A composite material comprising:
- (a) a three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, being substantially free of pyrolytically deposited carbon and having a diameter ranging from about 3.5 and 70 nanometers, said assemblage having a bulk density of from 0,001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm;
- and
- (b) a second component incorporated within said assemblage comprising (i) particulate solids, or (ii) an electroactive material;
- or (iii) a catalytically active metal or metal-containing compound, in an amount up to fifty parts per part by weight of fibrils.
A three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, being substantially free of pyrolytically deposited carbon and having a diameter ranging from about 3.5 and 70 nanometers, said assemblage having relatively uniform physical properties along at least one dimensional axis thereof and a bulk density of from 0.001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm.
A three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, being substantially free of pyrolytically deposited carbon and having a diameter between about 3.5 and 70 nanometers, said assemblage having relatively isotropic physical properties in at least one plane thereof and a bulk density of from 0.001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm.
A three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, being substantially free of pyrolytically deposited carbon and having a diameter ranging from about 3.5 and 70 nanometers, said assemblage having relatively isotropic physical properties and a bulk density of from 0.001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm.
A composite material comprising:
- (a) a three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, having a c-axes substantially perpendicular to their cylindrical axis, being substantially free of pyrolytically deposited carbon and having a diameter ranging from about 3.5 and 70 nanometers, said assemblage having a bulk density of from 0.001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm;
- and
- (b) a second component incorporated within said assemblage comprising (i) particulate solids, or (ii) an electroactive material;
- or (iii) a catalytically active metal or metal-containing compound, in an amount up to fifty parts per part by weight of fibrils.
A three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, having c-axes less than substantially perpendicular to their cylindrical axis, being substantially free of pyrolytically deposited carbon and having a diameter ranging from about 3.5 and 70 nanometers, said assemblage having relatively uniform physical properties along at least one dimensional axis thereof and a bulk density of from 0.001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm.
A three-dimensional, macroscopic assemblage of a multiplicity of randomly oriented carbon fibrils, said fibrils being substantially cylindrical with a substantially constant diameter, having c-axes less than substantially perpendicular to their cylindrical axis, being substantially free of pyrolytically deposited carbon and having a diameter ranging from about 3.5 and 70 nanometers, said assemblage having relatively isotropic physical properties and a bulk density of from 0.001 to 0.50 gm/cc and at least two dimensions greater than about 0.02 mm.
Dependencies are inferred from the claim text.