▎ 摘　　要

NOVELTY - Preparing low-leakage high-heat-conduction graphene heat dissipation film, involves (a) modifying the graphene by a Hummers method, and performing modification according to the following steps of 1: 5-1: 6, (b) mixing the graphene powder and potassium permanganate, and fully mixing in a sulfuric acid/phosphoric acid mixed solution in an ice bath environment, mixing, stirring for 12 hours at 50℃, filtering the mixed solution by a screen, cleaning and centrifuging for multiple times, (c) performing condensation and suction filtration by using ether, performing quaternization treatment on the product in a nitrogen environment, and performing ultrasonic dispersion, washing, filtering, vacuum drying and grinding to obtain powdery graphene, (d) performing high-temperature melting treatment on the phase change material, and adding the powdery graphene after melting, and (e) adding the powdery graphene, performing first ultrasonic stirring. USE - Method for preparing low-leakage high-heat-conduction graphene heat dissipation film. ADVANTAGE - The product adds graphene material to phase change material, and layers the graphene material by layered coating, and the graphene material quickly introduces heat into the interior of the phase change material, which provides great promotion whole phase change material's heat absorption efficiency DETAILED DESCRIPTION - Preparing low-leakage high-heat-conduction graphene heat dissipation film, involves (a) modifying the graphene by a Hummers method, and performing modification according to the following steps of 1: 5-1: 6, (b) mixing the graphene powder and potassium permanganate, and fully mixing in a sulfuric acid/phosphoric acid mixed solution in an ice bath environment, mixing, stirring for 12 hours at 50℃, filtering the mixed solution by a screen, cleaning and centrifuging for multiple times, (c) performing condensation and suction filtration by using ether, performing quaternization treatment on the product in a nitrogen environment, and performing ultrasonic dispersion, washing, filtering, vacuum drying and grinding to obtain powdery graphene, (d) performing high-temperature melting treatment on the phase change material, and adding the powdery graphene after melting, (e) adding the powdery graphene, performing first ultrasonic stirring, coating the mixture on the upper surface of the glass, and allowing the lower surface of the glass to pass through normal-temperature cooling water, (f) spin-coating silicone oil on the surface of the semi-finished product material, and laminating, where specific total thickness of the laminated layer is determined by the use requirement, and (g) preparing the phase-changeable graphene heat dissipation film through a hot-press molding process.