Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF14 Cites 18 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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 CNTs used in Example 1]

Embodiment 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. Due to the low wavelength side (100 ~ 300cm -1 ) RBM modes originating from multiple single-layer CNTs were observed, which shows 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 the result of eleme...

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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
The average diameteraaaaaaaaaa
Thermal conductivityaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com