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Carbon nanotube composite material and heat conductor

A carbon nanotube and composite material technology, applied in nanotechnology, carbon compounds, nanotechnology, etc., can solve the problems of increased thermal resistance and cooling of heating components and heat dissipation components, uneven distribution of carbon fibers, etc., to achieve excellent uniformity, high The effect of thermal conductivity

Inactive Publication Date: 2017-05-03
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 and back surfaces of the thermally conductive composite material will be uneven.
In this case, there is a problem that the thermal resistance between the heat-generating part and the heat-radiating part increases, and efficient cooling cannot be performed.

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

Embodiment 1

[0120] [Characteristics of CNT used in Example 1]

[0121] The representative values ​​of CNTs used in Example 1 are: length 100 μm, average diameter 3.0 nm, 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, indicating that a graphite crystal structure exists in the CNTs constituting the CNT aggregate of the present invention.

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

[0125] [Purity of CNT aggregate]

[0126] The carbon purity of the C...

Embodiment 2

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

Embodiment 3

[0141] In Example 3, silicone rubber (manufactured by Momentive High-Tech Materials Japan Co., Ltd., TSE3282-G) was used as the matrix. Utilize the manufacturing method identical with embodiment 1, add carbon nanotube dispersion liquid and carbon fiber respectively in silicone rubber solution, so that under the situation that the mass of carbon nanotube composite material integral body is 100% mass, carbon nanotube content is 4.8 %, the carbon fiber content is 19%, and the carbon nanotube composite material 220 is prepared.

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Abstract

The object of the present invention is to provide a carbon nanotube composite material with excellent uniformity and high thermal conductivity. In the carbon nanotube composite material of the present invention, a carbon nanotube group composed of a plurality of carbon nanotubes exists between adjacent carbon fibers, the average diameter of the carbon fibers is not less than 1 μm and not more than 50 μm, and the carbon nanotubes The average diameter of the tube is not less than 0.7nm and not more than 50nm, relative to 100% by weight of the carbon nanotube composite material, the content of the carbon nanotube is in the range of not less than 0.01% by weight and not more than 30% by weight, and the content of the carbon fiber is In the range of 10% by weight or more and 60% by weight or less, the thermal conductivity of the matrix material is less than 10W / mK, and the carbon nanotube composite material has a direction in which the thermal conductivity is 10W / mK or higher.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/00C08K3/04C08K7/06D01F9/145C01B32/174
CPCC08K3/04C08K7/06D01F9/145C08J5/005C08J5/042B82Y30/00Y10S977/742C08K3/041C08L21/00C08L101/00C08L27/12C09K5/14
Inventor 畠贤治阿多诚介
Owner NAT INST OF ADVANCED IND SCI & TECH