Carbon nanotube composite material and thermal conductor

Patent metadata

Field	Value
Publication number	US-9688897-B2
Application number	US-201615337450-A
Country	US
Kind code	B2
Filing date	Oct 28, 2016
Priority date	Oct 5, 2011
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A CNT composite material includes a CNT group and carbon fibers dispersed in a matrix, the CNT composite material includes 0.01 wt % or more and 30 wt % or less of CNT aggregate. The CNT group includes a three dimensional network structure with a size of 10 μm or more and has a maximum distribution range of a differential pore volume of 0.01 μm or more and 10 μm or less in a range of 4 nm or more and 1000 μm or less of a pore diameter. The carbon fibers have a maximum distribution range of a differential pore volume of 1 μm or more and 100 μm or less in a range of 4 nm or more and 1000 μm or less of a pore diameter. A total specific surface area of the CNT aggregate and the carbon fibers is 10 m 2 /g or more and 500 m 2 /g or less.

First claim

The invention claimed is:

1. A carbon nanotube composite material having a carbon nanotube group with carbon nanotubes and carbon fibers dispersed in a matrix, wherein
the carbon nanotubes provide 0.01 wt % or more and 30 wt % or less with respect to 100 wt % of the carbon nanotube composite material,
the carbon nanotube group comprises a three dimensional network structure with a size of 10 μm or more observed by using a two-dimensional image,
the carbon nanotube group enters between the carbon fibers and connects between the carbon fibers, and/or the carbon nanotube group links between the carbon fibers, and/or cross-links the carbon fibers between the carbon fibers, the carbon nanotube group enters between the carbon fibers and is arranged by being mutually entangled,
the carbon nanotube group has a maximum distribution range of a differential pore volume of 0.01 μm or more and 10 μm or less in a range of 4 nm or more and 1000 μm or less of a pore diameter measured by a mercury intrusion porosimeter,
the carbon fibers have a maximum distribution range of a differential pore volume of 1 μm or more and 100 μm or less in a range of 4 nm or more and 1000 μm or less of a pore diameter measured by a mercury intrusion porosimeter, and
a total specific surface area of the carbon nanotube group and the carbon fibers measured by using the Brunauer, Emmett and Teller method is 10 m 2 /g or more and 500 m 2 /g or less.

2. The carbon nanotube composite material according to claim 1 , wherein the carbon nanotube group has a nonwoven cloth shape and a layer shape by extending in an approximately perpendicular direction with respect to the thickness direction of the carbon nanotube composite.

3. The carbon nanotube composite material according to claim 1 , wherein the carbon nanotube group supports the carbon fibers and sedimentation of the carbon fibers is prevented thereby.

Assignees

• Nat Inst Advanced Ind Science & Tech

Inventors

• Hata Kenji
• ATA Seisuke

Classifications

• H10W40/257

  having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh or porous structures (H10W40/254, H10W40/251 take precedence) · CPC title

• H10W40/25

  characterised by their materials · CPC title

• C08L21/00

  Compositions of unspecified rubbers · CPC title

• C08J5/042

  with carbon fibres · CPC title

• C08K3/04

  Carbon · CPC title