Method for preparing vertical orientation graphene sheet/high polymer thermal interface material
A thermal interface material and vertical orientation technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of improved thermal conductivity, carbon nanotubes can not be well coupled with the matrix, etc., to achieve improved thermal conduction, easy industrial production, The effect of easy flow
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[0017] Here are related experiments conducted according to the existing conditions of the laboratory.
[0018] 1. Preparation of graphene oxide
[0019] Mainly use natural flake graphite as the basic raw material and use the modified Hummers method to prepare graphene oxide. The preparation steps are as follows:
[0020] (1) Place 200ml of concentrated sulfuric acid in an Erlenmeyer flask, add 4g of sodium nitrate, place the Erlenmeyer flask in a water bath (add room temperature water), and stir until the sodium nitrate is completely dissolved in the concentrated sulfuric acid;
[0021] (2) Slowly add 4g of graphite during the stirring process, during which the temperature of the water bath is controlled below 8°C;
[0022] (3) Slowly add 18g potassium permanganate during the stirring process, and control the temperature of the water bath below 8°C;
[0023] (4) Seal the conical flask with a sealing film, add an appropriate amount of ice cubes to the water bath to keep the temperature at...
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