Carbon nanotube composite material and heat conductor

A technology of carbon nanotubes and composite materials, applied in the direction of nanotechnology, nanotechnology, heat exchange materials, etc., can solve the problems of uneven distribution of carbon fibers, increased thermal resistance of heating components and cooling components, etc., to achieve excellent uniformity , the effect of high thermal conductivity

Inactive Publication Date: 2014-06-04
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the conventional technology as described above, there is a problem that if carbon fibers are added in a high filling amount, the dense carbon fibers will settle during the manufacturing process, and the distribution of carbon fibers on the front

Method used

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  • Carbon nanotube composite material and heat conductor
  • Carbon nanotube composite material and heat conductor
  • Carbon nanotube composite material and heat conductor

Examples

Experimental program
Comparison scheme
Effect test

Example

[0119] (Example 1)

[0120] [Characteristics of CNTs Used in Example 1]

Example Embodiment

[0121] The representative values ​​of the CNTs used in Example 1 are: length 100 μm, average diameter 3.0 nm, and thermal conductivity 80 W / mK.

[0122] [Raman spectrum evaluation of CNT aggregates]

[0123] The Raman spectrum of the CNT aggregate used in Example 1 was measured. At 1590cm -1 A sharp G-band peak was observed in the vicinity, and it was found that a graphite crystal structure exists in the CNTs constituting the CNT aggregate of the present invention.

[0124] In addition, since at 1340cm -1 D-band peaks originating from defect structures etc. are observed nearby, thus indicating that intentional defects are contained in the CNTs. Since the low wavelength side (100 ~ 300cm -1 ), RBM modes originating from a plurality of single-layer CNTs were observed, which indicates that the above-mentioned graphite layer is a single-layer CNT. The G / D ratio was 8.6.

[0125] [Purity of CNT aggregates]

[0126] The carbon purity of the CNT aggregate was determined from t...

Example

[0138] (Example 2)

[0139] As Example 2, by the same production method as in Example 1, a carbon nanotube dispersion liquid and carbon fibers were added to the fluororubber solution so that the carbon nanotube composite material had a mass of 100% by mass as a whole. The nanotube content was 4.8% and the carbon fiber content was 28.6%, and the carbon nanotube composite 210 was prepared.

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Abstract

The present invention addresses the problem of providing: a carbon nanotube composite material which has excellent uniformity and high thermal conductivity; and a heat conductor. A carbon nanotube composite material of the present invention has a carbon nanotube group, which is configured of a plurality of carbon nanotubes, present between adjacent carbon fibers. The carbon fibers have an average diameter of from 1 mum to 50 mum (inclusive); the carbon nanotubes have an average diameter of from 0.7 nm to 50 nm (inclusive); the carbon nanotubes are contained in an amount within the range from 0.01% by weight to 30% by weight (inclusive) and the carbon fibers are contained in an amount within the range from 10% by weight to 60% by weight (inclusive), respectively relative to 100% by weight of the carbon nanotube composite material; the thermal conductivity of the matrix material is less than 10 W/mk; and the carbon nanotube composite material has a direction in which the thermal conductivity is 10 W/mK or more.

Description

technical field [0001] The invention relates to a carbon nanotube composite material obtained by dispersing carbon nanotubes into a matrix. In addition, the present invention relates to a heat conductor including the above-mentioned carbon nanotube composite material. Background technique [0002] In recent years, along with the high integration of CPU and LED semiconductor elements, the processing speed during operation has also been increased, and the heat generation during operation tends to increase more than before. Therefore, if the heat generated during the operation of the semiconductor element is not efficiently escaped to the outside, the internal temperature of the operating semiconductor element may exceed the operating temperature limit and burn out. Then, generally, a heat-conducting composite material in which a heat-conducting filler is dispersed in a matrix is ​​inserted between a heat-generating component and a heat-dissipating component to cool it. [00...

Claims

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Application Information

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IPC IPC(8): C08L101/00C08K3/04C08K7/06D01F9/145C01B31/02
CPCB82Y30/00D01F9/145Y10S977/742D01F1/10C08J5/005C08K7/06C09K5/14C08K3/04C08J5/042C08K3/041C08L21/00C08L101/00C08L27/12
Inventor 畠贤治阿多诚介
Owner NAT INST OF ADVANCED IND SCI & TECH
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