▎ 摘　　要

NOVELTY - Preparing graphene oxide-silk fibroin-amphoteric cellulose composite material comprises placing the cellulose in 20% sodium hydroxide solution with bath ratio of 1:50, reacting at 90 degrees C for 120 minutes, washing repeatedly with deionized water until neutral, then drying to obtain sodium hydroxide modified cellulose, redispersing sodium hydroxide-modified cellulose in deionized water with bath ratio of 1:50, adding trimethylallyl ammonium chloride, where the mass ratio of trimethyl allyl ammonium chloride and sodium hydroxide modified cellulose is 1:5-1:10, reacting at 60-80 degrees C for 1-24 hours. USE - The method is useful for preparing graphene oxide-silk fibroin-amphoteric cellulose composite material (claimed). ADVANTAGE - The composite material is environmentally-friendly, bio-degradable, has good mechanical performance, high porosity and suitable in sewage treatment and photoelectric device. DETAILED DESCRIPTION - Preparing graphene oxide-silk fibroin-amphoteric cellulose composite material comprises: (i) placing the cellulose in 20% sodium hydroxide solution with bath ratio of 1:50, reacting at 90 degrees C for 120 minutes, washing repeatedly with deionized water until neutral, then drying to obtain sodium hydroxide modified cellulose, redispersing the sodium hydroxide-modified cellulose in deionized water with bath ratio of 1:50, adding trimethylallyl ammonium chloride, where the mass ratio of trimethyl allyl ammonium chloride and sodium hydroxide modified cellulose is 1:5-1:10, reacting at 60-80 degrees C for 1-24 hours, repeatedly washing with deionized water, then drying to obtain trimethylallyl ammonium chloride modified cellulose, redispersing the trimethylallyl ammonium chloride modified cellulose in deionized water with a bath ratio of 1:50, slowly adding 1-100 g/l polyamidoamine aqueous solution, where the volume ratio of polyamidoamine aqueous solution and trimethylallyl ammonium chloride modified cellulose aqueous solution is 1:5-1:10, reacting at 75-95 degrees C for 60-120 minutes, removing, washing and drying to obtain cationized cellulose, redispersing the cationized cellulose in deionized water with a bath ratio of 1:50, adding cerium ammonium nitrate initiator into cationized cellulose in a mass ratio of 1:10-1:30, mixing and stirring for 120 minutes, continuously passing nitrogen, then slowly adding dioctyl sodium sulfosuccinate, mixing, slowly warming at 80-90 degrees C and magnetically stirring for 1-12 hours, naturally cooling to room temperature, repeatedly washing with deionized water and ethanol, carrying out suction filtration and drying to obtain amphoteric cellulose; and (ii) dispersing 50-80 pts. amphoteric cellulose, 1-20 pts. silk fibroin and 1-20 pts. graphene oxide in deionized water with bath ratio of 1:50, ultrasonicating for 1 hour, reacting at 80-100 degrees C by stirring for 1-24 hours, repeatedly washing with deionized water, subjecting to suction filtration and drying. An INDEPENDENT CLAIM is also included for graphene oxide-silk fibroin-amphoteric cellulose composite material.