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
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[0032] The present invention provides a method for preparing a graphene-based thermally conductive interface material, which includes 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 / silica composite powder and graphene / silica composite sheet material;
[0034] B) Stretching, pressing, 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 will be described in detail, figure 1 It is the process flow for preparing graphene-based thermal interface material of the present invention.
[0036] The invention firstly mixes graphene materials, vinyl ...
Example Embodiment
[0087] Example 1
[0088] First, the nano-silica powder is functionalized, and the mass ratio of the nano-silica powder, water and isopropoxy tristearate acyloxy titanate is preferably 5:1000:3.
[0089] Then, the processed nano-silica and the graphene dispersion are mixed and reacted, and the graphene composite film compounded with silica is obtained by casting, and the film thickness is 10 microns.
[0090] Wherein, the mass ratio of the treated nano-silica to the graphene dispersion is preferably 10:500, the temperature of the mixing reaction is preferably 60°C, and the time of the mixing 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 hydroxy-terminated silicone oil, 5 parts of vinyl silicone oi...
Example Embodiment
[0094] Example 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-silica and the graphene dispersion are mixed and reacted, and the graphene composite film compounded with silica is obtained by casting, and the film thickness is 15 microns.
[0097] Wherein, the mass ratio of the treated nano-silica to the graphene dispersion is 10:800, the temperature of the mixing reaction is preferably 80°C, and the time of the mixing 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 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-methacryloxy propylene 0.6 parts of trimethoxysilane, vacu...
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