▎ 摘　　要

NOVELTY - The preparation method of modified graphene oxide/polylactic acid composite material involves taking graphite as raw material, preparing graphite oxide under action of strong oxidant, processing graphite oxide to prepare graphene oxide suspension, and processing to obtain dried graphene oxide, and storing, dispersing graphene oxide in anhydrous ethanol, adding hydrochloric acid, adjusting the pH value of the solution, placing in a water bath, dripping silane coupling agent containing ethanol into solution while stirring, centrifuging, washing, and placing in oven. USE - Preparation method of modified graphene oxide/polylactic acid composite material (claimed). ADVANTAGE - The method enables preparation of modified graphene oxide/polylactic acid composite material by simple and economical process. DETAILED DESCRIPTION - The preparation method of modified graphene oxide/polylactic acid composite material involves (1) taking graphite as raw material, preparing graphite oxide under action of strong oxidant, processing graphite oxide through mechanical method to prepare graphene oxide suspension, and processing to obtain dried graphene oxide, and storing, (2) dispersing graphene oxide in anhydrous ethanol by ultrasonic device, adding hydrochloric acid, adjusting the pH value of the solution to 2-4, placing in a water bath at 60-65 degrees C, dripping silane coupling agent containing ethanol into solution while stirring, continuously reacting at 60-65 degrees C for 24-48 hours, centrifuging the obtained product with anhydrous ethanol 5-8 times to remove unreacted silane coupling agent, washing with deionized water until neutral, and placing in oven at 60-65 degrees C for 24-48 hours, and (3) ultrasonically processing the modified graphene oxide in anhydrous ethanol for 1-3 hours to completely scatter, weighing polylactic acid with molecular weight of 60000, and adding dichloromethane to completely dissolve to obtain polylactic acid solution, pouring graphene oxide dispersion into polylactic acid solution, stirring for 8-10 hours to uniformly disperse, and placing in oven at 60-65 degrees C for 24-48 hours.