# US 7,411,085 B2 · Carbon nanotube dispersion, production method of carbon nanotube structure and carbon nanotube structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,411,085 B2 - Document ID: US7411085B2 - Status: Granted - Kind: B2 - Application number: 11/723,652 - Filed: 2007-03-21 - Published: 2008-05-01 - Granted: 2008-08-12 - Earliest claimed: 2006-09-29 - Assignees: Fuji Xerox Co., Ltd. - Inventors: Masaki Hirakata; Taishi Shigematsu - Web page: https://patentgrep.com/patent/US7411085B2 ## CPC - C01B 32/174: Derivatisation; Solubilisation; Dispersion in solvents - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - B82Y 40/00: Manufacture or treatment of nanostructures - B05D 2401/32: applied as powders - C01B 2202/02: Single-walled nanotubes - C01B 2202/28: Solid content in solvents - Y10S 977/788: Of specified organic or carbon-based composition - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A carbon nanotube dispersion includes a carbon nanotube compound represented by structural formula A and a dispersion medium in which the carbon nanotube is dispersed or dissolved, wherein a moiety represented by double lines represents a carbon nanotube R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group having one or two carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted carbodiimide group, R2 represents a substituted or unsubstituted alkyl group having from 1 to 4 carbon atoms, and m and n each independently represents an integer of 1 or more. ## Claims ### Claim 1 A carbon nanotube dispersion comprising: a carbon nanotube compound represented by structural formula A; and a dispersion medium in which the carbon nanotube is dispersed or dissolved, wherein a moiety represented by double lines represents a carbon nanotube; R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group having one or two carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted carbodiimide group; R2 represents an unsubstituted alkyl group having from 1 to 4 carbon atoms; and m and n each independently represents an integer of 1 or more. ### Claim 2 (depends on 1) The carbon nanotube dispersion according to claim 1, further comprising: a crosslinking agent that crosslinks the carbon nanotube compounds by chemically bonding functional groups containing R1 in structural formula A to each other. ### Claim 3 (depends on 1) The carbon nanotube dispersion according to claim 1, wherein R1 in structural formula A is a substituted or unsubstituted alkyl group having one or two carbon atoms. ### Claim 4 (depends on 1) The carbon nanotube dispersion according to claim 1, wherein the dispersion medium acts also as a crosslinking agent for crosslinking the carbon nanotube compounds by chemically bonding functional groups containing R1 in structural formula A to each other. ### Claim 5 (depends on 1) The carbon nanotube dispersion according to claim 1, wherein the carbon nanotube in the structural formula A is a single-walled carbon nanotube. ### Claim 6 A production method of a carbon nanotube structure comprising: preparing a carbon nanotube dispersion, wherein the preparing comprises dispersing or dissolving at least a carbon nanotube compound represented by structural formula A in a dispersion medium; and supplying the carbon nanotube dispersion onto a surface of a substrate, wherein a moiety represented by double lines represents a carbon nanotube; R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group having one or two carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted carbodiimide group; R2 represents an unsubstituted alkyl group having from 1 to 4 carbon atoms; and m and n each independently represents an integer of 1 or more. ### Claim 7 (depends on 6) The production method of the carbon nanotube structure according to claim 6, wherein the preparing comprises adding a crosslinking agent that crosslinks the carbon nanotube compounds by chemically bonding functional groups containing R1 in structural formula A to each other. ### Claim 8 (depends on 7) The production method of the carbon nanotube structure according to claim 7, wherein R1 in structural formula A is a substituted or unsubstituted alkyl group having one or two carbon atoms. ### Claim 9 (depends on 6) The production method of the carbon nanotube structure according to claim 6, wherein the dispersion medium acts also as a crosslinking agent for crosslinking the carbon nanotube compounds by chemically bonding functional groups containing R1 in structural formula A to each other. ### Claim 10 (depends on 6) The production method of the carbon nanotube structure according to claim 6, wherein the carbon nanotube in structural formula A is a single-walled carbon nanotube. ### Claim 11 (depends on 6) The production method of a carbon nanotube structure according to claim 6, further comprising: crosslinking the carbon nanotube compounds by chemically bonding functional groups containing R1 in structural formula A to each other after the supplying the carbon nanotube dispersion onto the surface of the substrate. ### Claim 12 (depends on 6) The production method of a carbon nanotube structure according to claim 6, wherein the dispersion medium comprises at least one of water and a water-soluble solvent at the preparing the dispersion; and the substrate at supplying the carbon nanotube dispersion is a substrate having a hydrophilic surface or a substrate having a hydrophilicization-processed surface. ### Claim 13 A carbon nanotube structure comprising: a carbon nanotube compound represented by structural formula B, wherein a moiety represented by double lines represents a carbon nanotube; X represents OR1 or a crosslinking site, wherein R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group having one or two carbon atom(s), a substituted or unsubstituted aryl group or a substituted or unsubstituted carbodiimide group and the crosslinking site are crosslinked to a carbonyl group in other carbon nanotube compounds represented by structural formula B; R2 represents an unsubstituted alkyl group having from 1 to 4 carbon atom(s); and m and n each independently represents an integer of 1 or more. ### Claim 14 (depends on 13) The carbon nanotube structure according to claim 13, wherein X represents the crosslinking site; the crosslinking site has a chemical structure selected from the group consisting of —O—, —O(CH2)2O—, —OCH2CHOHCH2O—, —OCH2CH(CH2OH)O— and a following structure; and the carbon nanotube structure has a network structure of the carbon nanotubes. ### Claim 15 (depends on 13) The carbon nanotube structure according to claim 13, wherein the carbon nanotube in structural formula B is a single-walled carbon nanotube.