Nanocarbon composite material and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10703633-B2
Application number	US-201615738835-A
Country	US
Kind code	B2
Filing date	Jun 17, 2016
Priority date	Jun 22, 2015
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

[Problem]To provide a nanocarbon composite material that is superior in providing electrical conductivity.
[Solution]In a nanocarbon composite material 100 in an example embodiment of the present invention, a fibrous carbon nanohorn aggregate 11 of a plurality of single-walled carbon nanohorn aggregates connected fibrously is dispersively formed in a matrix 13.

First claim

The invention claimed is:

1. A nanocarbon composite material in which a fibrous carbon nanohorn aggregate of a plurality of single-walled carbon nanohorn aggregates connected fibrously in a one-dimensional direction while being radially assembled with an end pointing outward is dispersively formed in a matrix.

2. The nanocarbon composite material according to claim 1 , wherein
a spherical single-walled carbon nanohorn aggregate is further dispersively formed in the matrix, in addition to the fibrous carbon nanohorn aggregate.

3. The nanocarbon composite material according to claim 1 , wherein
the matrix is made of any one or more of a metal, an oxide, a conductive polymer compound, a resin, and an elastomer.

4. The nanocarbon composite material according to claim 1 , wherein
the fibrous carbon nanohorn aggregate is 30 nm to 200 nm in diameter and 1 μm to 100 μm in length.

5. The nanocarbon composite material according to claim 1 , wherein
the single-walled carbon nanohorn is 1 nm to 5 nm in diameter and 30 nm to 100 nm in length and has a horn-shaped end.

6. The nanocarbon composite material according to claim 1 , wherein
the fibrous carbon nanohorn aggregate is an aggregate of fibrously connected carbon nanohorn aggregates of at least one shape type among a seed shape, a bud shape, a dahlia shape, a petal-dahlia shape, and a petal shape.

7. The nanocarbon composite material according to claim 2 , wherein
the spherical carbon nanohorn aggregate includes a carbon nanohorn aggregate of at least one shape type among a seed shape, a bud shape, a dahlia shape, a petal-dahlia shape, and a petal shape.

8. The nanocarbon composite material according to claim 1 , wherein
a catalyst metal is introduced inside of the fibrous carbon nanohorn aggregate or the spherical carbon nanohorn aggregate.

9. A method for manufacturing a nanocarbon composite material, the method comprising:
setting an inert gas atmosphere, a nitrogen gas atmosphere, or a mixture atmosphere in a chamber in which a catalyst-containing carbon target is placed;
evaporating the catalyst-containing carbon target by laser ablation while rotating the catalyst-containing carbon target;
controlling a gas flow rate to be constant in a process of evaporation of the catalyst-containing carbon target; and
mixing, into a matrix, a fibrous carbon nanohorn aggregate of a plurality of single-walled carbon nanohorns connected fibrously in a one-dimensional direction while being radially assembled with an end pointing outward, the fibrous carbon nanohorn aggregate being obtained through a process including the setting, the evaporating, and the controlling.

10. The method for manufacturing a nanocarbon composite material, according to claim 9 , wherein
a spherical single-walled carbon nanohorn aggregate is mixed into a matrix in addition to the fibrous carbon nanohorn aggregate.

Assignees

• Nec Corp

Inventors

• Yuge Ryota

Classifications

• C08K3/044 Primary

  Carbon nanohorns or nanobells · CPC title

• C01B32/05

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title