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A kind of graphene heat conduction film and its preparation method, electronic equipment

A graphene film and graphene thermal conductive film technology, applied in graphene, chemical instruments and methods, modification by conduction and heat transfer, etc., can solve the problem of unsatisfactory thickness of graphene thermal conductive film, easy delamination of thick graphene film, etc. problem, to achieve the effect of high mechanical strength and high heat flux

Active Publication Date: 2022-06-14
NINGBO GRAPHENE INNOVATION CENT CO LTD
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Problems solved by technology

The heat flux of the graphene thermally conductive film is usually positively correlated with the thickness of the graphene thermally conductive film. In order to obtain a thicker graphene thermally conductive film, multiple coatings are required during the film forming process of the graphene thermally conductive film, and the coating thickness Usually more than 5mm. However, with a large amount of moisture drying, the thickness of the graphene thermal film obtained by the above method is still not ideal. In addition, the thick graphene film obtained by multiple coatings is easy to delaminate.

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  • A kind of graphene heat conduction film and its preparation method, electronic equipment

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[0022] See Figure 1 , embodiments of the present invention provides on the one hand a method for preparing a graphene thermal conductive film, comprising: operation 101, the graphite paper is soaked in an acid intercalation solution for intercalation treatment, to obtain intercalation graphite paper; Operation 102, the intercalated graphite paper is soaked in an acidic oxidation solution for oxidation treatment to obtain expanded graphene paper; Operation 103, the expanded graphene paper is graphitized calendered to obtain a graphene thermal conductive film.

[0023] Embodiments of the present invention provides a method for preparing a graphene thermal conductive film, by selecting graphite paper as a raw material for the preparation of graphene thermal conductive film, using the graphite paper itself has a film-like structure, directly on the graphite paper interpolation and oxidation treatment, to obtain expanded graphene paper, and then the expanded graphene paper for graphene...

Embodiment 1

[0051] Preparation method of graphene thermal conductive film, including the following steps:

[0052] First of all, 200 micron thick graphite paper is selected, and it is soaked in a mixed solution of concentrated sulfuric acid and hydrogen peroxide, and the mass ratio of concentrated sulfuric acid and hydrogen peroxide is 15:1; after soaking for 1 minute, the graphite paper is removed, and the graphite paper can be observed to be slightly loose and fluffy;

[0053] Then, the graphite paper taken from the mixed solution of concentrated sulfuric acid and hydrogen peroxide is directly soaked into the mixed solution of concentrated sulfuric acid and potassium permanganate, and the mass ratio of concentrated sulfuric acid and potassium permanganate is 300:1; after soaking for 10 minutes, carefully fished out, it can be observed that the graphite paper further expands, and there is no graphite shed on the surface, at this time the graphite paper is actually graphene paper;

[0054] Af...

Embodiment 2

[0058] Preparation method of graphene thermal conductive film, including the following steps:

[0059] First of all, 300 microns thick graphite paper is selected, soaked in a mixed solution of concentrated sulfuric acid and hydrogen peroxide, the mass ratio of concentrated sulfuric acid and hydrogen peroxide is 8:1; after soaking for 30 seconds, take out the graphite paper, and the graphite paper can be observed to be slightly loose and fluffy;

[0060] Then, the graphite paper removed from the mixed solution of concentrated sulfuric acid and hydrogen peroxide is directly soaked into the mixed solution of concentrated sulfuric acid and potassium perchlorate, and the mass ratio of concentrated sulfuric acid and potassium perchlorate is 500:1; after soaking for 20 minutes, carefully fished out, it can be observed that the graphite paper further expands, and there is no graphite shedding on the surface, at this time the graphite paper is actually graphene paper;

[0061] After that, ...

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Abstract

The invention discloses a graphene heat conduction film, a preparation method thereof, and an electronic device, comprising: soaking graphite paper in an acidic intercalation solution for intercalation treatment to obtain intercalated graphite paper; soaking the intercalated graphite paper in The acidic oxidation solution is oxidized to obtain expanded graphene paper; the expanded graphene paper is subjected to graphitization and calendering treatment to obtain a graphene heat-conducting film; the application of this method can obtain thick, high heat flux and Graphene heat conduction film with good mechanical strength.

Description

Technical field [0001] The present invention relates to the field of graphene technology, in particular to a graphene thermal conductive film and preparation method thereof, electronic device. Background [0002] For smart electronic devices, as power consumption increases dramatically, heat generation also rises dramatically, requiring high-flux heat dissipation components to dissipate heat. The problem of thermal conductivity and heat dissipation of intelligent electronic equipment has become a key problem affecting the development of intelligent electronic equipment. For example, in the field of 5G, ultra-fast network speed and ultra-low latency can give us a better sense of experience, but for electronic devices, their heat generation has also risen sharply. [0003] Electronic equipment is usually through the graphene heat transfer film as a heat dissipation parts for heat dissipation, the current preparation method of graphene heat conductive film is as follows: first the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/192C01B32/194C01B32/196H05K7/20
CPCC01B32/192C01B32/194C01B32/196H05K7/2039C01B2204/32C01B2204/20C01B2204/24
Inventor 郭玉芬张慧涛刘跃文刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD