Conductive composition, and conductive complex

Patent metadata

Field	Value
Publication number	US-9892817-B2
Application number	US-201214119701-A
Country	US
Kind code	B2
Filing date	May 25, 2012
Priority date	May 25, 2011
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A conductive composition containing carbon nanotubes, a carbon nanotube dispersant, and a dopant precursor, wherein the dispersant is a non-conjugated polymer compound having an aromatic ring as the repeating unit, and the dopant precursor is an acid-generating agent which generates cation by being subjected to light and/or heat. The aforementioned conductive composition is capable of stably dispersing carbon nanotubes and of efficiently doping same without damaging the conductive properties of the carbon nanotubes.

First claim

The invention claimed is:

1. An electrically conductive composition characterized by comprising carbon nanotubes, a carbon nanotube dispersant, and a dopant precursor,
wherein:
the dispersant is a non-conjugated highly branched polymer having repeating units of formula (1) or formula (2) below

wherein Ar 1 to Ar 3 are each independently a divalent organic group of any one of formulas (3) to (7) below

in which R 5 to R 38 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 5 carbons which may have a branched structure, an alkoxy group of 1 to 5 carbons which may have a branched structure, or a carboxyl group, sulfo group, phosphoric acid group, phosphonic acid group or salt of any thereof; Z 1 and Z 2 in formula (1) are each independently a hydrogen atom, an alkyl group of 1 to 5 carbons which may have a branched structure, or a monovalent organic group of any one of formulas (8) to (11) below

in which R 39 to R 62 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 5 carbons which may have a branched structure, a haloalkyl group of 1 to 5 carbons which may have a branched structure, a phenyl group, OR 63 , COR 63 , COOR 63 , or NR 63 R 64 , with R 63 and R 64 being each independently a hydrogen atom, an alkyl group of 1 to 5 carbons which may have a branched structure, a haloalkyl group of 1 to 5 carbons which may have a branched structure, or a phenyl group, or a carboxyl group, sulfo group, phosphoric acid group, phosphonic acid group or salt of any thereof, with the proviso that Z 1 and Z 2 are not both alkyl groups; and R 1 to R 4 in formula (2) are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 5 carbons which may have a branched structure, an alkoxy group of 1 to 5 carbons which may have a branched structure, or a carboxyl group, sulfo group, phosphoric acid group, phosphonic acid group or salt of any thereof; and
the dopant precursor is an acid generator which generates cations under the influence of light and/or heat.

2. The electrically conductive composition according to claim 1 , wherein the polymer compound has a polystyrene-equivalent weight-average molecular weight, as measured by gel permeation chromatography, of from 1,000 to 2,000,000.

3. The electrically conductive composition according to claim 1 or 2 , which further comprises an organic solvent.

4. The electrically conductive composition according to claim 1 , wherein Ar 1 to Ar 3 are the divalent organic group of formula (3).

5. The electrically conductive composition according to claim 1 , wherein Z 1 and Z 2 in formula (1) are each independently the hydrogen atom or the monovalent organic group of formula (8).

6. An electrically conductive composite obtained from the conductive composition according to claim 1 or 2 .

7. The electrically conductive composite of claim 6 which is a thin-film.

8. A method of producing an electrically conductive composite, the method being characterized by the step of subjecting the electrically conductive composition of claim 1 or 2 to light irradiation and/or heat application.

Assignees

• Hatanaka Tatsuya
• Hida Masahiro
• Nissan Chemical Ind Ltd

Inventors

• Hatanaka Tatsuya
• Hida Masahiro

Classifications

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C08L65/00

  Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers · CPC title

• C08G2261/792

  with low-molecular weight dopants · CPC title

• C01B32/174

  Derivatisation; Solubilisation; Dispersion in solvents · CPC title

• C09D161/22

  of aldehydes with acyclic or carbocyclic compounds · CPC title