▎ 摘　　要

NOVELTY - Preparing thermoplastic polyurethane composite material involves preparing graphene oxide (GO); providing ultrasonic dispersion of prepared GO in sodium hydroxide (NaOH) solution with pH of 11; stirring obtained solution in magnetic stirrer, then adding epichlorohydrin and raising temperature to 60 degrees C and continue to stir for 8 hours, centrifuging with deionized water until supernatant is clear, and freeze-drying resultant product with four-ring lyophilizer to obtain epoxidized GO; adding aluminum oxide (Al2O3) to ethanol, adding gamma -aminopropyltriethoxysilane after stirring, ultrasonicating for 30 minutes, providing oil bath magnetic stirring at 78 degrees C for 4 hours, then slowly add deionized water dropwise and continue stirring for 0.5 hours, after cooling to room temperature, washing multiple times with large amount of ethanol and deionized water, and drying overnight at 60 degrees C to obtain aminated alumina. USE - Method for preparing thermoplastic polyurethane composite material. ADVANTAGE - The method for preparing thermoplastic polyurethane composite material enables to provide high thermal conductivity; improves thermal conductivity of thermoplastic polyurethane, and provides new ideas and explorations for development of thermoplastic polyurethane in future, is expected to have huge social and economic benefits in actual application. DETAILED DESCRIPTION - Preparing thermoplastic polyurethane composite material involves preparing graphene oxide (GO); providing ultrasonic dispersion of prepared GO in sodium hydroxide (NaOH) solution with pH of 11; stirring obtained solution in magnetic stirrer, then adding epichlorohydrin and raising temperature to 60 degrees C and continue to stir for 8 hours, centrifuging with deionized water until supernatant is clear, and freeze-drying resultant product with four-ring lyophilizer to obtain epoxidized GO; adding aluminum oxide (Al2O3) to ethanol, adding gamma -aminopropyltriethoxysilane after stirring, ultrasonicating for 30 minutes, providing oil bath magnetic stirring at 78 degrees C for 4 hours, then slowly add deionized water dropwise and continue stirring for 0.5 hours, after cooling to room temperature, washing multiple times with large amount of ethanol and deionized water, and drying overnight at 60 degrees C to obtain aminated alumina; adding obtained epoxidized GO and aminated alumina to dimethyl formamide (DMF) one by one, and after sonicating for 30 minutes, stirring in oil bath at 105 degrees C for 5 hours to initiate addition reaction of hydrogen, washing with large amount of DMF to remove excess aminated alumina, drying at 60 degrees C overnight to obtain product f-Al2O3-HGO; placing product in reaction kettle, adding glucose, keeping at 120 degrees C for 12 hours, cooling to room temperature, washing with large amount of ionized water, and drying overnight at 60 degrees C to obtain reduced f-Al2O3-HGO which obtain f-Al2O3-RHGO; adding obtained to in-situ polymerization reaction of thermoplastic polyurethane (TPU) to obtain f-Al2O3-RHGO/TPU composite material, which is, high thermal conductivity thermoplastic polyurethane composite material.