Preparation method of high-surface inner-heat-conduction insulation composite membrane
A technology of heat conduction insulation and composite film, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of using a large amount of organic solvents, low yield, long stripping time, etc., and achieves simple preparation methods and high in-plane thermal conductivity , the effect of broad application prospects
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Embodiment 1
[0019] Prepare 180 mL of a 5 mg / mL graphene oxide aqueous solution, add 100 mg of boron nitride microflakes, and stir ultrasonically to obtain a graphene oxide / boron nitride microflake mixed solution. Pour it into a polytetrafluoroethylene mold, and dry it in an oven at 40° C. to obtain a composite film. It maintains electrical insulation and has an in-plane thermal conductivity of 4.4 W / m·K.
Embodiment 2
[0021] Prepare 140 mL of a 5 mg / mL graphene oxide aqueous solution, add 300 mg of boron nitride microflakes, and stir ultrasonically to obtain a graphene oxide / boron nitride microflake mixture. Pour it into a polytetrafluoroethylene mold, and dry it in an oven at 60° C. to obtain a composite film. It maintains electrical insulation and has an in-plane thermal conductivity of 6.3 W / m·K.
Embodiment 3
[0023] Prepare 100 mL of a 5 mg / mL graphene oxide aqueous solution, add 500 mg of boron nitride microflakes, and stir ultrasonically to obtain a graphene oxide / boron nitride microflake mixed solution. Pour it into a polytetrafluoroethylene mold, and dry it in an oven at 70° C. to obtain a composite film. It maintains electrical insulation and has an in-plane thermal conductivity of 10.3 W / m·K.
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