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PET/graphene heat conductive film based on thermal curing and preparation method thereof

A technology of graphene and heat conduction film, applied in the direction of coating, etc., can solve the problems of poor heat conduction performance of heat conduction film, harm to human body and environment, uneven dispersion, etc., achieve good heat conduction performance, improve heat dissipation performance, and increase heat radiation rate Effect

Inactive Publication Date: 2018-07-17
HUNAN GUOSHENG GRAPHITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing graphene heat conduction films usually directly use graphene as the matrix material. Since graphene is easy to condense, it is unevenly dispersed in the slurry, which makes the heat conduction performance of the heat conduction film poor.
In order to reduce the agglomeration between graphene and improve the stability of graphene in the thermally conductive film, it is usually necessary to add chemical preparations such as polyethylene wax, polyvinyl chloride, and polyvinylpyrrolidone as dispersants or surfactants. Although adding the above chemical preparations It can reduce the condensation between graphene to a certain extent, but the use of chemical agents is easy to volatilize during the heat dissipation process, which is harmful to the human body and the environment

Method used

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  • PET/graphene heat conductive film based on thermal curing and preparation method thereof
  • PET/graphene heat conductive film based on thermal curing and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] The preparation method of a kind of graphene heat dissipation slurry of the present embodiment comprises the following steps:

[0038] S1. Prepare graphene heat dissipation slurry:

[0039] S11. Mixing, grinding and shearing the graphene quantum dots, graphene and solvent under the action of ultrasound, the ultrasonic power is 1000-1200W, and the time is 40-60min, to obtain a composite slurry material;

[0040] S12. After adding urea-formaldehyde resin, curing agent and carbon nanotubes to the composite slurry material prepared in step S11, stir at a speed of 1000 to 1200 rpm and a stirring time of 2 to 4 hours to obtain the initial product of graphene heat dissipation slurry;

[0041] S13. Add heat-conducting metal powder, defoamer, antioxidant, organic monomer N, N-methylenebisacryloyl and crosslinking agent methylenebisacrylamide to the initial product of graphene heat dissipation slurry obtained in step S12 , stir fully, the rotation speed is 1200-1500rpm, the stir...

Embodiment 2

[0049] Referring to the preparation method of Example 1, the difference is that the mass parts of each component in step S1 are: 12 parts of graphene, 70 parts of urea-formaldehyde resin, 35 parts of auxiliary agent, 30 parts of graphene quantum dots, 2 parts of heat-conducting metal powder, It consists of 6 parts of carbon nanotubes, 24 parts of solvent, 8 parts of curing agent, 12 parts of defoaming agent, 5 parts of antioxidant, 50 parts of organic monomer and 3 parts of crosslinking agent.

Embodiment 3

[0051] Referring to the preparation method of Example 1, the difference is that the mass fractions of each component in step S1 are: 8 parts of graphene, 60 parts of urea-formaldehyde resin, 18 parts of graphene quantum dots, 4 parts of thermally conductive metal powder, and 4 parts of carbon nanotubes , 18 parts of solvent, 6 parts of curing agent, 15 parts of defoamer, 4 parts of antioxidant, 60 parts of organic monomer, and 4 parts of crosslinking agent.

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Abstract

The invention relates to the technical field of heat conductive films, and discloses a PET / graphene heat conductive film based on thermal curing and a preparation method thereof. According to the heatconductive film, graphene quantum dots are added to the PET / graphene heat conductive film to effectively reduce the coacervation among graphene, a three-dimensional net-shaped structure is formed through chemical crosslinking or physical crosslinking by organic monomers through a gelcasting technology, and the graphene is immediately wrapped and isolated by polymer molecules or polymer monomers to effectively overcome the occurrence of the self-aggregation of the graphene; the thermal diffusion coefficient of the graphene of the prepared PET / graphene heat conductive film is 8-12 cm<2> / s, andthe thermal conductivity is 1300-1700 W / m k.

Description

technical field [0001] The invention relates to the technical field of heat-conducting films, and more specifically, to a heat-curing PET / graphene-based heat-conducting film and a preparation method thereof. Background technique [0002] For electronic products, the effective heat dissipation of its various components to obtain a lower operating temperature will have an extremely important impact on its service life and operating speed. With the continuous development and progress of science and technology, especially the multi-core of computer chips has become the mainstream, and the running speed continues to increase, and the power also increases accordingly. Effective heat dissipation plays a decisive role in its running speed. At present, the mainstream heat dissipation product on the market is graphite heat conduction film. However, its heat dissipation performance is far from meeting the heat dissipation requirements of heat dissipation devices of electronic informati...

Claims

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Application Information

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IPC IPC(8): C08J7/16C08J7/12C08J7/04C08J5/18C09D161/24C09D7/62C09D7/61C08L67/02
CPCC08J5/18C08J7/0427C08J7/123C08J7/16C08J2367/02C08J2461/24C08K3/04C08K7/24C08K9/10C08K2003/0806C08K2003/0812C08K2003/085C08K2201/011
Inventor 林前锋
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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