▎ 摘　　要

NOVELTY - Preparing graphene thermally conductive silica gel sheet involves (i) dissolving graphene oxide in distilled water to prepare graphene oxide aqueous solution, (ii) coating the graphene oxide aqueous solution on heating plate to form a film, using a bundle of carbon fiber bundles as a reel to roll into a roll when the film loses water and falls off the heating plate to obtain graphene oxide rolls, and drying, (iii) carbonizing the graphene oxide roll and graphitizing, (iv) cutting the graphene roll film into graphene sheets, (v) configuring thermal silica gel solution by vacuum-mixing (A/B) two-component silica gel, and obtaining thermal silica gel solution, (or) weighing thermally conductive filler and mixing, adding (A/B) two-component silica gel for vacuum mixing and degassing, stirring, and stirring well to obtain thermally conductive silica gel solution, and (vi) soaking graphene sheet in thermally conductive silica gel solution, removing excess thermal silica gel, and curing. USE - The method is useful for preparing graphene thermally conductive silica gel sheet (claimed). ADVANTAGE - The silica gel sheet has high viscosity, high thermal conductivity and excellent tear resistance, and meets various heat dissipation requirement. DETAILED DESCRIPTION - Method for preparing graphene thermally conductive silica gel sheet involves (i) dissolving graphene oxide in distilled water to prepare a 0.1-1.5 wt.% graphene oxide aqueous solution, (ii) coating the graphene oxide aqueous solution on heating plate to form a film of 1-2 mm, using a bundle of carbon fiber bundles as a reel to roll into a roll when the film loses water 40-50wt.% and falls off the heating plate to obtain graphene oxide rolls, and drying in an oven, (iii) carbonizing the graphene oxide roll and graphitizing to obtain a graphene roll film with a density of 0.1-0.2 g/cm3, (iv) cutting the graphene roll film into graphene sheets with a thickness of not less than 0.3 mm, (v) configuring thermal silica gel solution by vacuum-mixing (A/B) two-component silica gel, and obtaining thermal silica gel solution after 1-2 hours, (or) weighing the thermally conductive filler, uniformly mixing, adding (A/B) two-component silica gel for vacuum mixing and degassing, stirring for 2-4 hours, and stirring well to obtain thermally conductive silica gel solution, and (vi) soaking the graphene sheet in the thermally conductive silica gel solution for 2 to 4 hours, taking out, removing excess thermal silica gel on the surface of the graphene sheet, and curing in an oven at 130 degrees C for 6-8 hours to obtain graphene thermal silica gel roll. An INDEPENDENT CLAIM is included for a graphene thermally conductive silica gel sheet comprising graphene roll, thermally conductive silica gel and carbon fiber bundles, where the graphene roll is wound on the outside of the carbon fiber bundle, and the thermally conductive silica gel is attached to the surface of the graphene roll after being laid.