▎ 摘　　要

NOVELTY - Method for preparing graphene/polyphenylene ether alloy thermally conductive composite material, involves (i) adding polyphenylene ether alloy to toluene/N-methyl-2-pyrrolidone mixed solution, dissolving, adding graphene and ultrasonically dispersing to form uniformly mixed solution, where the mass ratio of mixed solution and polyphenylene ether alloy is (5-10):1, the volume ratio of N-methyl-2-pyrrolidone and toluene is (1-3):1 and the polyphenylene ether alloy is mixture of polyphenylene ether and high-impact polystyrene in a mass ratio is (2-4):1, (ii) adding methanol to mixed solution and rapidly stirring solution to precipitate polyphenylene ether alloy from toluene/N-methyl-2-pyrrolidone mixed solution, and (iii) subjecting solid-liquid mixture to suction filtration, washing filter cake with methanol, placing in vacuum drying box at 80-120 degrees C for 12-24 hours and performing injection molding using injection molding machine to obtain the product. USE - The method is useful for preparing graphene/polyphenylene ether alloy thermally conductive composite material. ADVANTAGE - The method provides graphene/polyphenylene ether alloy thermally conductive composite material that has simple process, realizes the recycling of the three solvents by a simple distillation method, has low boiling point of methanol and less energy consumption during recycling process, and requires only a less amount of thermal fillers to highly improve their thermal conductivity compared with traditional thermal conductive fillers. DETAILED DESCRIPTION - Method for preparing graphene/polyphenylene ether alloy thermally conductive composite material, involves (i) adding 92-99 parts mass polyphenylene ether alloy to toluene/N-methyl-2-pyrrolidone mixed solution, dissolving, adding 1-8 parts mass graphene and ultrasonically dispersing to form uniformly mixed solution, where the mass ratio of mixed solution and polyphenylene ether alloy is (5-10):1, the volume ratio of N-methyl-2-pyrrolidone and toluene is (1-3):1 and the polyphenylene ether alloy is mixture of polyphenylene ether and high-impact polystyrene in a mass ratio is (2-4):1, (ii) adding methanol to mixed solution and rapidly stirring solution to precipitate polyphenylene ether alloy from toluene/N-methyl-2-pyrrolidone mixed solution, where the volume ratio of methanol and mixed solution is 1:(0.5-2), and (iii) subjecting solid-liquid mixture obtained in step (ii) to suction filtration, washing filter cake with methanol 1-5 times, placing in vacuum drying box at 80-120 degrees C for 12-24 hours and performing injection molding using injection molding machine to obtain the product.