▎ 摘　　要

NOVELTY - Preparation of graphene composite silicone packaging material, involves (i) preparing modified graphene oxide, (ii) preparing modified vinyl polysiloxane, (iii) taking raw materials which comprises modified graphene oxide, modified vinyl polysiloxane, calcium carbonate, methylnadic anhydride, bisphenol epoxy resin, titanate coupling agent and hydrogen silicone oil crosslinking agent, (iv) mixing the raw materials, heating, degassing, defoaming, performing melt extrusion, cooling and pelletizing to obtain pellets, performing low pressure drying, and injection molding. USE - Preparation of graphene composite silicone packaging material (claimed). ADVANTAGE - The graphene composite silicone packaging material has high thermal conductivity, low expansion coefficient, excellent mechanical properties, excellent impact resistance, excellent high-temperature resistance, excellent UV-radiation resistance and excellent thermal performance. DETAILED DESCRIPTION - Preparation of graphene composite silicone packaging material, involves (i) weighing 4-6 pts. wt. graphene oxide, adding to 600-800 pts. wt. deionized water, adding 400-500 pts. wt. absolute ethanol, ultrasonically dispersing at a power of 300-400 W for 20-30 minutes, then adding 6-7 pts. wt. KH-560 (RTM: gamma -glycidoxypropyltrimethoxysilane), continuing the ultrasonic dispersion for 1-2 hours, then centrifuging at a speed of 4000-5000 rpm, washing the precipitate with deionized 3-5 times, adding the washed precipitate to deionized water in a mass ratio of 1:(15-25), then ultrasonically dispersing at a power of 200-250 W for 35-45 minutes, adding 12-24 pts. wt. hydrazine hydrate, continuing the ultrasonic dispersion at 60-70 degrees C for 3-5 hours, centrifuging, to obtain precipitate, washing with deionized water until neutral, and the drying in an oven at 120-130 degrees C for 4-6 hours to obtain modified graphene oxide, (ii) adding 45-50 pts. wt. vinyl polysiloxane and coupling agent to a closed four-necked flask, stirring at room temperature for 1-2 hours, increasing the temperature to 55-65 degrees C, dripping 3-3.2 parts of fluorine-containing heptyl methacrylate monomer and 3-3.5 parts of ethylene glycol mixture of catalyst while stirring, reacting for 3-4 hours, the continually stirring until the solution is transparent without stratification exists and cooling to 28-30 degrees C, distilling off toluene solvent under reduced pressure and heat-preserving for 1.5-2 hours, then cooling to room temperature to obtain modified vinyl polysiloxane, and performing vacuum degassing seal preservation, (iii) taking 3-5 pts. wt. modified graphene oxide, 4-6 pts. wt. modified vinyl polysiloxane, 3-6 pts. wt. calcium carbonate, 1-1.5 pts. wt. methylnadic anhydride, 18-20 pts. wt. bisphenol epoxy resin, 0.5-1 pt. wt. titanate coupling agent and 1-3 pts. wt. hydrogen silicone oil crosslinking agent, (iv) mixing the raw materials of step (iii), heating to mix evenly, degassing the mixture in a vacuum degassing machine, defoaming for 5-7 hours, adding the defoamed mixture into a hopper of a twin-screw extruder, performing melt extrusion at a screw speed of 600-800 rpm, cooling and pelletizing to obtain pellets, then performing low pressure drying, and then injection molding with an injection molding machine to obtain modified graphene composite silicone packaging material.