▎ 摘　　要

NOVELTY - Preparation of modified graphene-chitosan composite film involves preparing modified graphene, preparing dispersion liquid of the modified graphene, adding acetic acid solution of chitosan to obtain uniformly-dispersed modified graphene-chitosan mixed solution, pouring the mixed solution into a vessel, drying to constant weight at 40-80 degrees C under atmospheric or vacuum environment to obtain the modified graphene-chitosan composite film. USE - Preparation of modified graphene-chitosan composite film (claimed). ADVANTAGE - The modified graphene-chitosan composite film is produced under mild reaction conditions. DETAILED DESCRIPTION - Preparation of modified graphene-chitosan film involves dispersing graphene oxide in deionized water, ultrasonically treating for 0.1-12 hours, stirring at room temperature to obtained aqueous graphene oxide dispersion having concentration of 0.01-2 mg/mL, adding 7-amino-4-methylcoumarin, stirring at 20-50 degrees C for 0.1-12 hours, adding an alkaline solution, stirring for 0.1-12 hours, adjusting pH to 9-10, adding a chemical reducing agent, reacting at 60-100 degrees C for 12-96 hours, filtering, washing, drying at 40-80 degrees C to obtain modified graphene, adding solvent, ultrasonically treating, adding acetic acid solution of chitosan, stirring for 0.1-12 hours, ultrasonically treating for 0.3-24 hours to obtain uniform dispersion of modified graphene-chitosan mixed solution, drying at 40-80 degrees C in atmospheric or vacuum environment to obtain a modified graphene-chitosan composite film.