▎ 摘　　要

NOVELTY - Preparing graphene liquid metal composite silica gel pad involves adding graphene oxide and gallium-based alloy liquid metal to water at a certain mass ratio, adding an acid solution and using ultrasonic stirring to obtain a graphene liquid metal aqueous dispersion. The graphene liquid metal aqueous dispersion is dispersed to rotary evaporation in the instrument to obtain graphene liquid metal slurry. The graphene liquid metal slurry is coated, dried and calendered to obtain a graphene liquid metal film. The graphene liquid metal film is transferred to a doctor blade coater, and uniformly sprayed the two-component liquid silica gel mixture on its surface. The scraper gap is adjusted and scraping off the redundant two-component liquid silica gel mixture to obtain a graphene liquid metal film coated with the two-component liquid silica gel mixture. USE - Method for preparing graphene liquid metal composite silica gel pad. ADVANTAGE - The method uses silica gel is used to bond graphene liquid metal film, as a mechanical carrier of graphene liquid metal composite silicone gasket, endow the graphene liquid metal composite silicone gasket with compressibility and resilience, improves the contact between the graphene liquid metal composite silicone gasket and the heat sink and heat-generating device. DETAILED DESCRIPTION - Preparing graphene liquid metal composite silica gel pad involves adding graphene oxide and gallium-based alloy liquid metal to water at a certain mass ratio, adding an acid solution and using ultrasonic stirring to obtain a graphene liquid metal aqueous dispersion. The graphene liquid metal aqueous dispersion is dispersed to rotary evaporation in the instrument to obtain graphene liquid metal slurry. The graphene liquid metal slurry is coated, dried and calendered to obtain a graphene liquid metal film. The graphene liquid metal film is transferred to a doctor blade coater, and uniformly sprayed the two-component liquid silica gel mixture on its surface. The scraper gap is adjusted and scraping off the redundant two-component liquid silica gel mixture to obtain a graphene liquid metal film coated with the two-component liquid silica gel mixture. The previous step is repeated to obtain the graphene liquid metal film, placed on the surface of the two-component liquid silica gel coating, and aligned up and down, then obtained a graphene liquid metal film/two-component liquid silica gel stack. The graphene liquid metal film/two-component liquid silica gel stack placed in an oven, heated and cured to obtain a graphene liquid metal film/silica gel composite material. The graphene liquid metal thin film/silica gel composite material cut along the thickness direction of the stack, and turned over 90° to obtain a graphene liquid metal composite silica gel gasket.