▎ 摘　　要

NOVELTY - Preparing graphene composite antistatic biodegradable polylactic acid plastic, comprises e.g. (i) placing the polylactic acid particles in blast oven for drying, taking out, then dissolving them in organic solvent A to obtain first mixture, (ii) catalyzing the copolymerization of ethylene and 2-trimethylsiloxyethyl acrylate using palladium-diimine catalyst to obtain hyperbranched binary copolymer containing hydroxy end groups, then initiating graft copolymerization of epoxy monomer €-caprolactone based on ring-opening aggregation mechanism by hydroxy end group using hyperbranched binary copolymer to obtain polycaprolactone grafted hyperbranched polyethylene, (iii) grafting polycaprolactone grafted hyperbranched polyethylene liquid phase ultrasonic exfoliation of graphite using polycaprolactone groups to obtain graphene dispersions, (iv) adding graphene dispersion into first mixture, stirring to obtain second mixture, and (v) casting second mixture into mold, removing the solvent. USE - The method is useful for preparing graphene composite antistatic biodegradable polylactic acid plastic. ADVANTAGE - The method: improves the antistatic property of the polylactic acid plastics. DETAILED DESCRIPTION - Preparing graphene composite antistatic biodegradable polylactic acid plastic, comprises (i) placing the polylactic acid particles in a blast oven for sufficient drying, then taking out, and then dissolving them in the organic solvent A to obtain first mixture, (ii) catalyzing the copolymerization of ethylene and 2-trimethylsiloxyethyl acrylate using palladium-diimine catalyst to obtain hyperbranched binary copolymer containing hydroxy end groups (HBPE-OH), then initiating graft copolymerization of epoxy monomer €-caprolactone based on the ring-opening aggregation mechanism by hydroxy end group using hyperbranched binary copolymer as a macroinitiator to obtain polycaprolactone grafted hyperbranched polyethylene (HBPE-PCL), (iii) grafting polycaprolactone grafted hyperbranched polyethylene liquid phase ultrasonic exfoliation of graphite using polycaprolactone groups to obtain graphene dispersions, (iv) adding the graphene dispersion obtained in step (iii) into first mixture, and then stirring to obtain second mixture, the ratio between graphene and polylactic acid is 1:20-100, and (v) casting the second mixture obtained in step (iv) into a mold, and removing the solvent to obtain antistatic plastic.