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Graphene based heat-conducting interface material and preparation method thereof

A graphene-like material and graphene-based technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of high price and unfavorable general application, so as to improve the longitudinal thermal conductivity and facilitate the rapid export of heat Effect

Active Publication Date: 2017-05-10
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are very few thermal interface materials used in the market with a thermal conductivity above 5w / mk, and the price is very expensive, which is not conducive to general application

Method used

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  • Graphene based heat-conducting interface material and preparation method thereof
  • Graphene based heat-conducting interface material and preparation method thereof
  • Graphene based heat-conducting interface material and preparation method thereof

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preparation example Construction

[0032] The invention provides a method for preparing a graphene-based thermal interface material, comprising the following steps:

[0033] A) Mix graphene-based materials, vinyl silicone rubber, hexagonal boron nitride, flake graphite, hydroxyl-terminated silicone oil, vinyl silicone oil, and the first silane coupling agent, and stir to obtain a rubber compound. The graphene-based material selected from graphene, graphene / silicon dioxide composite powder and graphene / silicon dioxide composite sheet material;

[0034] B) stretching, rolling and cutting the rubber material to obtain a graphene-based thermally conductive interface material.

[0035] see figure 1 , the preparation method of the graphene-based thermal interface material provided by the present invention is described in detail, figure 1 The process flow for preparing graphene-based thermal interface material for the present invention.

[0036] In the present invention, firstly, the graphene material, vinyl silico...

Embodiment 1

[0088] Firstly, the nano-silica powder is subjected to functionalization treatment, and the mass ratio of the nano-silica powder, water, and isopropoxy tristearic acid acyloxy titanate is preferably 5:1000:3.

[0089] Then, the treated nano silicon dioxide and the graphene dispersion liquid are mixed and reacted, and the graphene composite film compounded with silicon dioxide is obtained by casting, and the film thickness is 10 microns.

[0090] Wherein, the mass ratio of the treated nano silicon dioxide and graphene dispersion is preferably 10:500. The temperature of the mixed reaction is preferably 60°C, and the time of the mixed reaction is preferably 6h; the graphene dispersion The mass ratio of graphene, water and sodium polyacrylate in the liquid is preferably 5:1000:0.1.

[0091] Take 12 parts of the above-mentioned graphene composite film, 100 parts of vinyl silicone rubber, 90 parts of hexagonal boron nitride, 85 parts of 75um flake graphite, 3.5 parts of hydroxyl-ter...

Embodiment 2

[0095] First, the nano-silica powder is functionalized, and the mass ratio of the nano-silica powder, water, and stearic acid is preferably 15:1000:10.

[0096] Then, the treated nano silicon dioxide and the graphene dispersion liquid are mixed and reacted, and the graphene composite film compounded with silicon dioxide is obtained by casting, and the film thickness is 15 microns.

[0097]Wherein, the mass ratio of the treated nano silicon dioxide and graphene dispersion is 10:800. The temperature of the mixed reaction is preferably 80°C, and the time of the mixed reaction is preferably 2h; the graphene dispersion The mass ratio of graphene, water and sodium alginate is preferably 10:1000:0.3.

[0098] Take 15 parts of the above-mentioned graphene composite film, 100 parts of vinyl silicone rubber, 90 parts of hexagonal boron nitride, 70 parts of 75um flake graphite, 1.5 parts of hydroxyl-terminated silicone oil, 6 parts of vinyl silicone oil, γ-methacryloxypropane 0.6 part o...

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Abstract

The invention provides a preparation method for a graphene based heat-conducting interface material. The preparation method comprises the following steps: A) mixing a graphene material, vinyl silicone rubber, hexagonal boron nitride, flake graphite, hydroxy-terminated silicone oil, vinyl silicone oil and a first silane coupling agent, and carrying out stirring so as to obtain a rubber material, wherein the graphene material is one or more selected from the group consisting of graphene, graphene / silica composite powder and a graphene / silica composite sheet material; and B) subjecting the rubber material to pull-pressing, rolling and cutting so as to obtain the graphene based heat-conducting interface material.

Description

technical field [0001] The invention belongs to the technical field of thermally conductive interface materials, and in particular relates to a graphene-based thermally conductive interface material and a preparation method thereof. Background technique [0002] Traditional thermal interface materials are mainly filled with polymers or grease with thermally conductive particles to form several types of interface materials such as thermal grease, thermal adhesive, thermal conductive rubber, and phase change materials. The filling volume of the filler is required to be very large (about 70%) in order to achieve a thermal conductivity of 1-5W / (m·K) at room temperature. Therefore, the demand for better interfacial thermal conductivity materials and fillers with higher thermal conductivity is increasingly urgent. [0003] With the rapid development of electronic technology, the integration degree and power density of electronic components are continuously improved, and the power...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08K13/06C08K7/00C08K3/04C08K3/38C08K9/04C08K3/36C08K9/10C08K9/02C09K5/14
Inventor 丁世云周旭峰刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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