▎ 摘　　要

NOVELTY - Modified dried graphite oxide powder is mixed with 1-epoxy propanol, ultrasonically treated, heated, magnetic stirred and ring-opening polymerized, to obtain colloidal solution. The colloidal solution is redispersed with anhydrous methanol, ultrasonically processed, and acetone is added to mixture, and black solid is precipitated. The black solid is washed, vacuum dried, dispersed in water, ultrasonically processed, and reducing agent is added to dispersion, stirred, dialyzed, centrifuged and freeze-dried, to obtain hyperbranched polyglycerol surface-modified graphene. USE - Preparation of hyperbranched polyglycerol surface-modified graphene (claimed). ADVANTAGE - The method enables preparation of hyperbranched polyglycerol surface-modified graphene with excellent water dispersibility by simple and environmentally-friendly method. DETAILED DESCRIPTION - 50-250 mg Modified dried graphite oxide powder is mixed with 7-25 mL 1-epoxy propanol with purity of 96-99% and ultrasonically dispersed for 1-2 hours. The dispersion liquid is poured to flask, ultrasonically treated, heated, magnetic stirred and ring-opening polymerized, to obtain colloidal solution. The colloidal solution is cooled to room temperature, redispersed with 50-250 mL anhydrous methanol, ultrasonically processed for 10-30 minutes, and 100-500 mL acetone is added to mixture, maintained still, and black solid is precipitated and supernatant is discarded. The black solid is washed for 3 times and vacuum dried at room temperature for 8-10 hours, to obtain black powder. The black powder is dispersed in 50-250 mL water, ultrasonically processed for 5-10 minutes in water bath, and 50-250 mg reducing agent is added to dispersion, stirred at room temperature for 15-30 hours, dialyzed in deionized water for 1-3 days and centrifuged at high speed for 1-2 hours. The precipitate is freeze-dried, to obtain hyperbranched polyglycerol surface-modified graphene.