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Graphene heat conducting member and preparation method thereof

A graphene and heat-conducting member technology, applied in the field of graphene heat-conducting member and its preparation, can solve the problems of difficulty in realizing large-scale industrial production, affecting the heat-conducting effect of products, and easily uneven thickness, so as to facilitate large-scale production and improve heat conduction and heat dissipation. The effect of performance and operation simplification

Active Publication Date: 2019-08-02
CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned preparation method, when coating a high-thickness graphene oxide solution or self-assembling to form a thicker film layer, it is easy to delaminate, and the thickness is easy to be uneven and difficult to control, which puts strict requirements on the preparation operation. It is difficult to achieve large-scale industrial production, and at the same time, it is easy to affect the heat conduction effect of the product

Method used

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preparation example Construction

[0027] The invention provides a kind of preparation method of graphene heat conduction member, comprises the following steps:

[0028] a) coating an organic liquid on the surface of the graphene oxide film to form an organic liquid film, and then covering the surface of the organic liquid film with a graphite oxide film; repeating the above-mentioned operations of coating the organic liquid and covering the graphite oxide film to a desired thickness to obtain a composite precursor;

[0029] b) cold pressing the composite precursor to obtain a pressed body;

[0030] c) heat-treating the pressed body under inert gas or reducing gas conditions to obtain a heat-treated part;

[0031] d) performing graphitization treatment and cold pressing treatment on the heat-treated part to obtain a graphene heat-conducting part.

[0032] In the preparation method provided by the present invention, an organic liquid is first coated on the surface of the graphene oxide film to form an organic ...

Embodiment 1

[0053] S1: Spray organic liquid on the surface of graphene oxide film with a thickness of 20 μm, and the spraying amount is 20g / m 2 , the organic liquid composition is: water: ethanol: CMC: PVA mass ratio is 100:20:3:5, another same graphene oxide film is placed on the surface of the organic liquid film, and the above-mentioned spraying of the organic liquid and paste oxidation Manipulation of graphene membranes, stacked to a thickness of 203 μm;

[0054] S2: Place the laminated composite precursor in a laminator for cold pressing, the cold pressing pressure is 5.0 MPa, and the time is 8 minutes;

[0055] S3: Put the obtained pressed body into a low-temperature oven at 50°C and dry for 5 hours;

[0056] S4: Place the dried composite in a carbonization furnace, and perform reduction and carbonization treatment at 1250° C. for 6 hours in a nitrogen atmosphere;

[0057] S7: Graphitization treatment in a graphitization furnace at 2850°C for 6 hours;

[0058] S8: Place the graph...

Embodiment 2

[0061] S1: Spray organic liquid on the surface of graphene oxide film with a thickness of 30 μm, and the spraying amount is 20g / m 2 , the organic liquid composition is: water: ethanol: CMC: PVA mass ratio is 100:80:5:10, another same graphene oxide film is placed on the surface of the organic liquid film, and the above-mentioned spraying of the organic liquid and paste oxidation Manipulation of graphene membranes, stacked to a thickness of 246 μm;

[0062] S2: Place the laminated composite precursor in a laminator for cold pressing, the cold pressing pressure is 1.0 MPa, and the time is 5 minutes;

[0063] S3: Put the obtained pressed body into a low-temperature oven at 60°C for 5 hours;

[0064] S4: Place the dried composite in a carbonization furnace, and perform reduction and carbonization treatment at 1300°C for 6 hours under an argon atmosphere;

[0065] S7: Graphitization treatment in a graphitization furnace at 2900°C for 6 hours;

[0066] S8: Place the graphitized c...

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Abstract

The invention provides a graphene heat conducting member and a preparation method thereof. The preparation method of the graphene heat conducting member provided by the invention comprises the following steps: a) coating the surface of a graphene oxide film with organic liquid to form an organic liquid film, and then covering the surface of the organic liquid film with a graphite oxide film; spraying the organic liquid and covering with the graphite oxide film repeatedly until a desired thickness to obtain a composite precursor; b) cold-pressing the composite precursor to obtain a pressed body; c) performing heat treatment on the pressed body under an inert gas or reducing gas condition to obtain a heat-treated member; d) performing graphitization treatment and cold-pressing treatment on the heat-treated member to obtain the graphene heat conducting member. By adopting the preparation method provided by the invention, graphene members with high thickness can be prepared, the preparation process is simple and feasible, and facilitates large-scale production, and at the same time, the obtained product has high quality and achieves relatively good heat conduction effect.

Description

technical field [0001] The invention relates to the technical field of heat-conducting materials, in particular to a graphene heat-conducting element and a preparation method thereof. Background technique [0002] Graphite is an allotrope formed by carbon elements. Due to its perfect molecular structure, it has unique thermal, electrical, chemical and other properties, and can be widely used in industries such as electronics and heat dissipation. At present, the high thermal conductivity graphite film with a planar thermal conductivity of 800-1500W / m.K solves the local overheating problem of low-power chips such as mobile phones. [0003] However, as the performance of electronic equipment is getting better and better, the processing speed and frequency are getting higher and higher, the volume and weight are getting bigger and bigger, and the power is getting bigger and bigger, so the heat generation of electronic equipment is getting bigger and bigger, and the requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B37/08B32B37/10B32B38/00B32B38/16C01B32/184
CPCB32B9/007B32B9/04B32B37/08B32B37/10B32B38/00B32B38/0036B32B38/164B32B2255/24B32B2307/302B32B2313/04C01B2204/24C01B32/184
Inventor 聂爽胡明源吕新坤肖成城古文正任大磊
Owner CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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