US5589152A
Expired / Lapsed
US
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Carbon fibrils, method for producing same and adhesive compositions containing same
Assignee: Hyperion Catalysis International Inc
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Filing: 1995-06-06
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Granted: 1996-12-31
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Expires: 2015-06-06
Abstract
Abstract This invention concerns a discrete carbon fibril characterized by a substantially constant diameter between about 3.5 and about 70 nanometers, length greater than about 5 times the diameter and less than about 100 times the diameter, an outer region of multiple essentially continuous layers of ordered carbon atoms and a distinct inner core region. The invention further concerns a plurality of such fibrils. The fibrils of this invention may be produced by contacting for an appropriate period of time and at a suitable pressure a suitable metal-containing particle with a suitable gaseous, carbon-containing compound, at a temperature between about 850 DEG C. and 1200 DEG C., or by treating discrete carbon fibrils, characterized by a length greater than about 100 times the diameter. Carbon fibrils may also be continuously produced by continuously contacting for an appropriate period of time at suitable conditions. Another aspect of the invention concerns a composition of matter comprising a carbon fiber or a carbon plate and a plurality of fibrils. Carbon fibrils and compositions of matter comprising carbon fibrils are useful in composites having a matrix of e.g., an organic polymer, an organic polymer or a metal. In specific embodiments, the fibrils or the compositions of matter may be used to reinforce a structural material, to enhance the electrical or thermal conductivity of a material, to increase the surface area of an electrode or capacitor plate, to provide a support for a catalyst, or to shield an object from electromagnetic radiation.
Inventors
- 👤 Howard G. Tennent
- 👤 James J. Barber
- 👤 Robert Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:08
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/18; B01J27/00; B01J27/20; B01J35/00; B01J35/50; B01J35/58; B82; B82Y; B82Y30/00; C; C04; C04B; C04B14/00; C04B14/38; C04B14/386; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/16; C04B35/515; C04B35/56; C04B35/565; C04B35/58; C04B35/581; C04B35/584; C04B35/622; C04B35/62227; C04B35/62272; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/127; D01F9/00; D01F9/08; D01F9/12; D01F9/127; D01F9/1271; D01F9/1272; D01F9/1273; D01F9/1275; D01F9/1276; D01F9/1277; D01F9/1278; F; F16; F16D; F16D69/00; F16D69/02; F16D69/023; H; H01; H01B; H01B1/00; H01B1/02; H01B1/04; H01B1/14; H01B1/16; H01B1/18; H01B1/20; H01B1/24; B29; B29K; B29K2307/00; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5248; C04B2235/5264; C04B2235/5284; C04B2235/5288; C04B2235/5296; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2935; Y10T428/2973; Y10T428/2975; Y10T428/30
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
117 words
A fibril mat comprising a plurality of carbon fibrils formed by collecting said fibrils to form a mat, wherein each of said fibrils is characterized by a substantially constant diameter, length greater than about 5 times the diameter, an ordered outer region of catalytically grown, multiple, substantially continuous layers of ordered carbon atoms having an outside diameter between about 3.5 and 70 nanometers, and a distinct inner core region, each of the layers and the core being disposed substantially concentrically about the cylindrical axis of the fibril, wherein each of said fibrils is substantially free of pyrolytically deposited thermal carbon and the diameter of said fibril being equal to the outside diameter of said ordered outer region.
Claim 2
Dependent Claim
117 words
A fibril mat comprising a plurality of carbon fibrils formed by collecting said fibrils to form a mat, wherein each of said fibrils is characterized by a substantially constant diameter, length greater than about 5 times the diameter, an ordered outer region of catalytically grown, multiple, substantially continuous layers of ordered carbon atoms having an outside diameter between about 3.5 and 70 nanometers, and a distinct inner core region, each of the layers and the core being disposed substantially concentrically about the cylindrical axis of the fibril, wherein each of said fibrils is substantially free of pyrolytically deposited thermal carbon and the diameter of said fibril being equal to the outside diameter of said ordered outer region.
Claim 3
Dependent Claim
33 words
A method of producing of a fibril mat of claim 1 which comprises preparing a plurality of carbon fibrils so as to form a fibril mat by collecting said fibrils on a filter.
Claim 4
Dependent Claim
22 words
A fibril mat according to claim 1, wherein said graphitic domains have c-axes substantially perpendicular to the cylindrical axis of the fibril.
Claim 5
Dependent Claim
52 words
A furry fiber comprising a carbon fiber and a plurality of carbon fibrils, wherein said fibrils adhere to the outer surface of the fiber and said fibrils are characterized by a substantially constant diameter, length greater than about 5 times the diameter and an outside diameter between about 3.5 and 70 nanometers.
Claim 6
Dependent Claim
52 words
A furry fiber comprising a carbon fiber and a plurality of carbon fibrils, wherein said fibrils adhere to the outer surface of the fiber and said fibrils are characterized by a substantially constant diameter, length greater than about 5 times the diameter and an outside diameter between about 3.5 and 70 nanometers.
Claim 7
Dependent Claim
25 words
A furry fiber according to claim 4, wherein said fibrils comprise an outer region of ordered carbon atoms, said ordered carbon atoms comprising graphitic domains.
Claim 8
Dependent Claim
21 words
A furry fiber according to claim 5, wherein said graphitic domains have c-axes substantially perpendicular to cylindrical axis of the fibril.
Claim 9
Dependent Claim
24 words
A furry fiber according to claim 5, wherein said outer region of ordered carbon atoms comprises multiple, substantially continuous layers of ordered carbon atoms.
Claim 10
Dependent Claim
26 words
A furry fiber according to claim 7, wherein each of the layers and the core being disposed substantially concentrically about the cylindrical axis of the fibril.
Claim 11
Dependent Claim
37 words
A furry fiber according to claim 4, wherein each of said fibrils being substantially free of pyrolytically deposited thermal carbon and the diameter of said fibrils being equal to the outside diameter of said ordered outer region.
Claim 12
Dependent Claim
15 words
A furry fiber according to claim 5, said fibrils having a distinct inner core region.
Claim 13
Dependent Claim
28 words
A furry fiber according to claim 10, wherein said inner core region contains carbon atoms that are less ordered than the ordered carbon atoms of the outer region.
Claim 14
Dependent Claim
20 words
A furry fiber according to claim 10, wherein said inner core region has a diameter less than about 2 nanometers.
Claim 15
Dependent Claim
52 words
A furry plate comprising a carbon plate and a plurality of carbon fibrils, wherein said fibrils adhere to the outer surface of the plate and said fibrils are characterized by a substantially constant diameter, length greater than about 5 times the diameter and an outside diameter between about 3.5 and 70 nanometers.
Claim 16
Dependent Claim
52 words
A furry plate comprising a carbon plate and a plurality of carbon fibrils, wherein said fibrils adhere to the outer surface of the plate and said fibrils are characterized by a substantially constant diameter, length greater than about 5 times the diameter and an outside diameter between about 3.5 and 70 nanometers.
Claim 17
Dependent Claim
25 words
A furry plate according to claim 13, wherein said fibrils comprise an outer region of ordered carbon atoms, said ordered carbon atoms comprising graphitic domains.
Claim 18
Dependent Claim
21 words
A furry plate according to claim 14, wherein said graphitic domains have c-axes substantially perpendicular to cylindrical axis of the fibril.
Claim 19
Dependent Claim
24 words
A furry plate according to claim 14, wherein said outer region of ordered carbon atoms comprises multiple, substantially continuous layers of ordered carbon atoms.
Claim 20
Dependent Claim
26 words
A furry plate according to claim 16, wherein each of the layers and the core being disposed substantially concentrically about the cylindrical axis of the fibril.
Claim 21
Dependent Claim
37 words
A furry plate according to claim 13, wherein each of said fibrils being substantially free of pyrolytically deposited thermal carbon and the diameter of said fibrils being equal to the outside diameter of said ordered outer region.
Claim 22
Dependent Claim
15 words
A furry plate according to claim 15, said fibrils having a distinct inner core region.
Claim 23
Dependent Claim
14 words
A furry plate according to claim 19, wherein said inner core region is hollow.
Claim 24
Dependent Claim
61 words
A composition of matter which comprises a first carbon fibril and a plurality of branch fibrils, wherein each of said branch fibrils adhere to the outer surface of the first carbon fibril and said branch fibrils are characterized by a substantially constant diameter, length greater than about 5 times the diameter and an outside diameter between about 3.5 and 70 nanometers.
Claim 25
Dependent Claim
61 words
A composition of matter which comprises a first carbon fibril and a plurality of branch fibrils, wherein each of said branch fibrils adhere to the outer surface of the first carbon fibril and said branch fibrils are characterized by a substantially constant diameter, length greater than about 5 times the diameter and an outside diameter between about 3.5 and 70 nanometers.
Claim 26
Dependent Claim
27 words
A composition of matter according to claim 21, wherein said branch fibrils comprise an outer region of ordered carbon atoms, said ordered carbon atoms comprising graphitic domains.
Claim 27
Dependent Claim
22 words
A composition of matter according to claim 22, wherein said graphitic domains have c-axes substantially perpendicular to cylindrical axis of the fibrils.
Claim 28
Dependent Claim
25 words
A composition of matter according to claim 23, wherein said outer region of ordered carbon atoms comprises multiple, substantially continuous layers of ordered carbon atoms.
Claim 29
Dependent Claim
27 words
A composition of matter according to claim 24, wherein each of the layers and the core being disposed substantially concentrically about the cylindrical axis of the fibrils.
Claim 30
Dependent Claim
39 words
A composition of matter according to claim 21, wherein each of said branch fibrils being substantially free of pyrolytically deposited thermal carbon and the diameter of said fibrils being equal to the outside diameter of said ordered outer region.
Claim 31
Dependent Claim
16 words
A composition of matter according to claim 23, said fibrils having a distinct inner core region.
Claim 32
Dependent Claim
15 words
A composition of matter according to claim 27, wherein said inner core region is hollow.
References Cited (Backward Citations)
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