▎ 摘　　要

NOVELTY - Preparing polyethylene imine modified oxide graphene composite material comprises separating the graphite oxide, after cleaning and dispersing, by ultrasonic treatment to obtain the concentration is 2-4 mg/mL of the oxide graphene; using dip-coating and room-temperature drying method to prepare the oxide graphene filter material by the graphene dispersion liquid; soaking the graphene coating filter material into the polyethylene imine (PEI) solution with concentration of 1-3mg/mL, grafting the polyethylene imine (PEI) to the surface of the filter material of the oxidized graphene by ultrasonic treatment and finally cleaning, drying to obtain the polyethylene imine modified oxide graphene composite material. USE - Method for preparing polyethylene imine modified oxide graphene composite material. ADVANTAGE - The method has low cost and simple manufacturing technique.