A kind of graphene heat-conducting silica gel sheet and preparation method thereof

A technology of heat-conducting silica gel sheet and heat-conducting silica gel, which is applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the problems of small application range of graphene sheets, and achieve the effect of simple production method, high strength, and good thermal conductivity

Active Publication Date: 2022-01-28
福建永安市永清石墨烯研究院有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide a graphene thermally conductive silica gel sheet and its preparation method, to overcome the defect that the applicable range of graphene sheets is relatively small in the prior art

Method used

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  • A kind of graphene heat-conducting silica gel sheet and preparation method thereof

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preparation example Construction

[0023] A preparation method for a graphene thermally conductive silica gel sheet, comprising the following steps:

[0024] Step 1: dissolving graphene oxide in distilled water to prepare a graphene oxide aqueous solution of 0.1 wt% to 1.5 wt%;

[0025] Step 2: Coat the graphene oxide aqueous solution on the heating plate to form a layer of 1-2mm film. When the film loses 40wt%-50wt% of water and falls off the heating plate, use a bundle of carbon fiber bundles as a winding rod to wrap it Roll into a roll to obtain a graphene oxide roll and dry it in an oven;

[0026] Step 3: Carbonize the graphene oxide roll first, and then graphitize it to obtain a density of 0.1-0.2g / cm 3 Graphene roll film;

[0027] Step 4: Cut the graphene film into graphene sheets with a thickness not less than 0.3 mm;

[0028] Step 5: Configure a thermally conductive silica gel solution; vacuum mix A / B two-component silica gel, and obtain a thermally conductive silica gel solution after 1 to 2 hours; ...

Embodiment 1

[0061] A preparation method for a graphene thermally conductive silica gel sheet, comprising the following steps:

[0062] Step 1: Dissolve 5.18g of graphene oxide with a solid content of 38.6% in 194.82g of distilled water, and combine with ultrasonic stirring for 2h to prepare a 1wt% graphene oxide aqueous solution;

[0063] Step 2: Coat the graphene oxide aqueous solution on the heating plate to form a film of 1-2mm, and set the temperature of the heating plate to 80°C to dehydrate the film; when the film loses 40wt% of water and falls off the heating plate, Use a bundle of carbon fiber bundles as a rolling rod to roll it into a roll to obtain a graphene oxide roll. The gap between layers of the graphene oxide roll is less than 1mm, and dry it in an oven at 80°C for 2 to 4 hours;

[0064] Step 3: Carbonize graphene oxide rolls in graphene rolls in a tube furnace, and the heating rate of the tube furnace is divided into three stages:

[0065] The first stage: keep graphene ...

Embodiment 2

[0073] refer to figure 1 , on the basis of Example 1, a graphene heat-conducting silica gel sheet is made, including graphene roll 1, heat-conducting silica gel 2 and carbon fiber bundle 3; graphene roll 1 is wound on the outside of carbon fiber bundle 3; heat-conducting silica gel 2 is bonded On the surface of the graphene roll 1 after tiling.

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Abstract

The invention discloses a graphene heat-conducting silica gel sheet and a preparation method thereof, comprising the preparation of a graphene oxide aqueous solution, the preparation of a graphene oxide roll, the preparation of a graphene roll film, the preparation of a graphene sheet, the configuration of a heat-conducting silica gel solution, Preparation of graphene thermally conductive silicone rolls. The graphene heat-conducting silicone sheet produced by the invention has high viscosity, high thermal conductivity and good tear resistance, and can meet various heat dissipation requirements.

Description

technical field [0001] The invention relates to the technical field of graphene thermally conductive materials, in particular to a graphene thermally conductive silica gel sheet and a preparation method thereof. Background technique [0002] With the development of the electronic information industry and the miniaturization and multi-function of electronic equipment, more powerful functions are integrated into smaller electronic components. Therefore, under high-frequency operation, the heat dissipation of electronic devices is particularly important. The two solid surfaces between the electronic device and the heat dissipation device have a certain roughness, that is, the surface is uneven, the actual contact area is only about 10% of the macro contact area, and the rest are all gaps, and the thermal conductivity of air is 0.025W / (mK), which greatly increases the thermal resistance and reduces the heat dissipation efficiency of electronic devices. For this reason, it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/14
CPCC09K5/14
Inventor 陈威于梦雪龙晴明杜鸿达
Owner 福建永安市永清石墨烯研究院有限公司
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