▎ 摘　　要

NOVELTY - Preparing graphene grafted POSS synergistic flame-retardant polycarbonate composite material involves adding 80-200 pts. wt. silicon hydrogen bond-terminated double-layer silsesquioxane DDSQ, 5-15 pts. wt. p-chloromethyl styrene and toluene in the two-port bottle under the protection of nitrogen, stirring and adding karstedt catalyst, reacting to obtain the chloroaryl terminated POSS, preparing beta-diketone-based graphene by adding 1 pts. wt. graphene oxide into toluene, ultrasonic processing, adding 2-13 pts. wt. p-methyl benzoyl chloride, ultrasonic reacting for 1-3h at 30-60degrees Celsius, filtering, using N, N-dimethyl formamide (DMF) to clean, obtaining chloromethyl aryl acylated graphene. USE - Method for preparing graphene grafted POSS synergistic flame-retardant polycarbonate composite material. ADVANTAGE - The method enables to prepare graphene grafted POSS synergistic flame-retardant polycarbonate composite material with improved polycarbonate flame retardant property. DETAILED DESCRIPTION - Preparing graphene grafted POSS synergistic flame-retardant polycarbonate composite material involves adding 80-200 pts. wt. silicon hydrogen bond-terminated double-layer silsesquioxane DDSQ, 5-15 pts. wt. p-chloromethyl styrene and toluene in the two-port bottle under the protection of nitrogen, stirring and adding karstedt catalyst, reacting to obtain the chloroaryl terminated POSS, preparing beta-diketone-based graphene by adding 1 pts. wt. graphene oxide into toluene, ultrasonic processing, adding 2-13 pts. wt. p-methyl benzoyl chloride, ultrasonic reacting for 1-3h at 30-60degrees Celsius, filtering, using N, N-dimethyl formamide (DMF) to clean, obtaining chloromethyl aryl acylated graphene, weighing 60-150 pts. wt. anhydrous potassium carbonate and 25-50 pts. wt. acetyl ethyl ester in the round flask, adding mixed solvent of acetonitrile and water, ice water bath stirring, adding 40-100 pts. wt. chloromethyl aryl acylated graphene, continuously stirring, the reaction time is 8-12h to obtain beta-diketone-based graphene, preparing graphene-grafted POSS flame retardant by weighing 35-110 pts. wt. anhydrous potassium carbonate and 65-200 pts. wt. beta-diketone-based graphene in the flask, adding mixed solvent of acetonitrile and water, stirring at room temperature, adding 250-1000 pts. wt. chloroaryl terminated POSS, continuously stirring, the reaction time is 3-10h, obtaining the graphene grafted POSS flame retardant, preparing graphene-grafted POSS synergistic flame-retardant polycarbonate composite material, weighing 3-12 pts. wt. graphene grafted POSS flame retardant, 100 pts. wt. polycarbonate, mixing, mixing, tabletting and cooling, after drying the granules, injecting the standard sample of graphene grafted POSS synergistic flame-retardant polycarbonate composite material on the injection moulding machine.