▎ 摘　　要

NOVELTY - Wave-absorbing heat-conducting gasket, prepared into aerogel by constructing a three-dimensional thermal conduction path by directional freezing of liquid nitrogen, and prepared by pouring liquid silicone rubber. The components of the liquid silicone rubber in the wave-absorbing heat-conducting gasket comprises vinyl-terminated silicone oil, hydrogen-containing silicone oil, inhibitors and accelerators. The main body of the heat-conducting filler is hexagonal boron nitride and the main body of the wave-absorbing filler is reduced graphene oxide and the two are combined by chemical bonds. USE - The wave-absorbing heat-conducting gasket is useful in thermal interface material and electromagnetic wave-absorbing for electronic equipment of power and integration degree. ADVANTAGE - The wave-absorbing heat-conducting gasket shows excellent heat-conducting and wave-absorbing performance in the direction vertical under extremely low filler filling amount (15 wt.%). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing wave-absorbing heat-conducting gasket, comprising (i) adding the hexagonal boron nitride and sucrose into the ball milling tank for ball milling, subjecting the treated hexagonal boron nitride to suction filtration and placing the processed hexagonal boron nitride in the oven box drying; (ii) placing the reduced graphene oxide in a certain concentration of hydrogen sulfuric acid aqueous solution with stirring for 12-24 hours, controlling the concentration of reduced graphene oxide at 2-10 g/liter, filtering the treated reduced graphene oxide and placing in an oven to dry for use; (iii) taking the above-treated hexagonal boron nitride and reduced graphene oxide to prepare an aqueous solution, combining by electrostatic self-assembly, and placing in an oven for drying after suction filtration; (iv) preparing the 15-20 wt.% filler and the 1-3 wt.% carboxymethyl cellulose into an aqueous solution, placing the prepared solution on a liquid nitrogen freezing platform and freezing it directionally to make ice cubes; (v) placing the ice cubes in a freeze dryer for lyophilization for 3-5 days to make aerogels; (vi) weighing the vinyl-terminated silicone oil, hydrogen-containing silicone oil and inhibitor in proportion, vacuum defoaming and mixing at 500-1000 revolutions/minute evenly, weighing the accelerator in proportion to carry out vacuum defoaming and mixing at 1000-2000 revolutions/minute rotating speed, soaking the aerogel in the prepared silicone rubber solution, heating at 80-120degrees Celsius, and curing for 5-30 minutes; and (vii) slicing the cured block and double-sided film.