▎ 摘　　要

NOVELTY - Modifying graphene by hydrosilylation process, comprises: (i) mixing graphene oxide and allyl ethoxy silane, adding 95% of ethanol, regulating pH to 3-6, ultrasonically dispersing for 1-4 hours, and reacting for 2-6 hours at 40-80 degrees C, and adding hydrazine hydrate and aqueous ammonia, reducing at 50-100 degrees C, reacting for 2-6 hours, filtering, washing and drying to obtain allyl silane grafted graphene; and (ii) mixing allyl silane grafted graphene and methylbis(dimethylvinylsiloxy)silane, adding platinum/carbon catalyst, reacting for 1-10 hours at 30-80 degrees C, filtering and washing with ethanol. USE - The method is useful for modifying graphene by hydrosilylation process. ADVANTAGE - The hyperbranched polysiloxane modified graphene not only has improved graphene dispersibility, and good biocompatibility and ultraviolet light polymerization property. DETAILED DESCRIPTION - Modifying graphene by hydrosilylation process, comprises: (i) mixing graphene oxide and allyl ethoxy silane in a mass ratio of 1:(1-10), adding 95% of ethanol (100-1000 ml), regulating pH to 3-6, ultrasonically dispersing for 1-4 hours, and reacting for 2-6 hours at 40-80 degrees C, and then adding hydrazine hydrate (10-80 ml) and aqueous ammonia (20-80 ml), reducing at 50-100 degrees C, reacting for 2-6 hours, filtering, washing and vacuum drying for 12 hours to obtain allyl silane grafted graphene; and (ii) mixing allyl silane grafted graphene and methylbis(dimethylvinylsiloxy)silane in the mass ratio of 1:(1-500), adding 0.1-4% of platinum/carbon catalyst, reacting for 1-10 hours at 30-80 degrees C under nitrogen atmosphere, filtering and washing with ethanol to obtain hyperbranched polysiloxane modified graphene.