Preparation method of large-flux and high-density graphene heat-conducting film and product obtained

A large-flux, graphene technology, applied in the field of graphene, can solve the problems of the orderliness and compactness of the internal structure of the finished film, the long preparation time of the finished film, and the difficulty in reducing the production cost of the heat-conducting film, etc., to improve the preparation Efficiency and finished product quality, adjustable thickness, easy-to-operate effect

Active Publication Date: 2021-07-13
HAIKE GRP RES INST OF INNOVATION & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, there are many procedures in the conventional graphene thermal conductive film preparation process, including slurry preparation, homogenization, coating, drying, foaming, carbonization, graphitization, and roller extension, etc., resulting in a long time for the preparation of the finished film. It is difficult to reduce the production cost of the thermal conductive film; on the other hand, in the drying and foaming process in the conventional process, due to the inconsistency of the drying of the inner and outer surfaces when the base film is dried, and the difference in the release of bubbles at different positions, the internal structure of the finished film will be arranged Order and compactness have a noticeable effect

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  • Preparation method of large-flux and high-density graphene heat-conducting film and product obtained

Examples

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Effect test

Embodiment 1

[0028] A method for preparing a large-flux and high-density graphene heat-conducting film, comprising the following steps:

[0029] Granulate graphene oxide into 0.5mm particles, weigh 10g of deionized water, weigh granulated graphene oxide according to 1% of the quality of deionized water, add it to deionized water, and use a high-speed mixer at 1500rpm to stir and disperse for 10min. Then carry out 120MPa homogeneous treatment to obtain a coating slurry with a viscosity of 10000MPa s;

[0030] Using an injection molding process, inject the obtained coating slurry into a glass substrate model with a length and width of 1cm×1cm and a thickness of 1mm through an injection molding machine;

[0031] Put the obtained base film into a microwave vacuum machine for a microwave treatment, the microwave power is 500W, and the treatment time is 1000s to obtain a dry film;

[0032] The obtained primary dry film is subjected to a rolling process using a roller machine, and the rolling pr...

Embodiment 2

[0036] A method for preparing a large-flux and high-density graphene heat-conducting film, comprising the following steps:

[0037] Granulate graphene oxide into 2mm particles, weigh 1kg of deionized water, weigh granulated graphene oxide according to 4% of the quality of deionized water, add it to deionized water, use a high-speed mixer at 1800rpm to stir and disperse for 15min, and then Carry out 150MPa homogeneous treatment to obtain a coating slurry with a viscosity of 80000MPa s;

[0038] Using injection molding process, the obtained coating slurry is injected into the mold of the glass substrate with a length and width of 25cm×30cm and a thickness of 5mm through an injection molding machine;

[0039] Put the obtained base film into a microwave vacuum machine for a microwave treatment, the microwave power is 1000W, and the treatment time is 500s to obtain a dry film;

[0040] The obtained primary dry film is subjected to a rolling process using a roller machine, and the ro...

Embodiment 3

[0044] A method for preparing a large-flux and high-density graphene heat-conducting film, comprising the following steps:

[0045] Graphene oxide was granulated into 1cm particles, weighed 10kg of deionized water, weighed granulated graphene oxide according to 20% of the quality of deionized water, added to deionized water, and stirred and dispersed with a high-speed mixer at 3000rpm for 60min, and then Carry out 180MPa homogeneous treatment to obtain a coating slurry with a viscosity of 100000MPa s;

[0046] Using injection molding process, the obtained coating slurry is injected into the mold of the glass substrate with a length and width of 40cm×40cm and a thickness of 10mm through an injection molding machine;

[0047] Put the obtained base film into a microwave vacuum machine for a microwave treatment, the microwave power is 1500W, and the treatment time is 10s to obtain a dry film;

[0048] The obtained primary dry film is subjected to a rolling process using a roller ...

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Abstract

The invention provides a method for preparing a large-flux and high-density graphene heat conduction film and a product thereof, which belong to the technical field of graphene. The preparation method provided by the present invention specifically adopts microwave curing-foaming dual-link process, utilizes the high efficiency of microwave curing of thermosetting compounds and the strong absorption of active low molecular substances to microwaves, and makes the low molecular substances absorb microwaves and gasify while the compounds are solidified , so that curing and foaming can be carried out at the same time, which greatly improves the preparation efficiency and the quality of the finished product. At the same time, this method has no special requirements for the coating film thickness, size, shape, viscosity and other parameters, which can make the obtained film have adjustable thickness, greater heat flux, more regular and dense internal arrangement and higher density, and Excellent thermal conductivity.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a preparation method of a large-flux and high-density graphene heat conduction film and a product obtained therefrom. Background technique [0002] Graphene, as a new type of material that has sprung up in recent years, has been widely used in smart phones, tablet computers, fanless design notebook computers, new energy vehicle power batteries and other fields. The heat dissipation film mainly includes natural graphite heat dissipation film and polyimide artificial graphite film. Among them, the graphene heat conduction film prepared from graphene oxide, due to its incomparable advantages such as higher thermal conductivity, lower cost, etc., will make its growth space in the heat dissipation film market more and more broad. [0003] In the current research on graphene thermal conductive film, how to reduce its production cost and improve the quality of the finishe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B2204/20C01B2204/24C01B32/184
Inventor 崔云龙陈忠洲张聪苗力孝王亚龙张善如郑奇董广利
Owner HAIKE GRP RES INST OF INNOVATION & TECH
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