▎ 摘　　要

NOVELTY - Preparing graphene-based hybrid flame retardant/shape memory polyurethane flame retardant composite material comprises e.g. (i) adding 1-50 pts. wt. graphene oxide and 10-150 pts. wt. deionized water into three-necked flask, and stirring vigorously, adding 1-50 pts. wt. commercial flame retardant solution dropwise into above suspension, continue ultrasonic stirring, transferring into autoclave, and reacting, cooling, separating precipitate, washing, and drying to obtain graphene-based hybrid flame retardant, (ii) adding 1-50 pts. wt. polyester diol, 3-150 pts. wt. isocyanate-based monomer, 2-100 pts. wt. chain extender, organic solvent with 1-3 times of solid content, and 0.001-0.01 pts. wt. organic bismuth catalyst into three-necked flask with stirring device, and reacting to obtain polyurethane precursor, and (iii) subjecting graphene-based hybrid flame retardant to in situ suspension polymerization with polyurethane precursor, and reacting. USE - The graphene-based hybrid flame retardant/shape memory polyurethane flame retardant composite material is useful in smart packaging and coating fields. ADVANTAGE - The flame retardant composite material: has excellent performance and low cost. The method: synergistically improves flame retardant properties by combining graphene oxide with commercial flame retardant; and remotely controls shape memory function of composite material through photothermal effect of graphene, and gives excellent shape memory function to the material. DETAILED DESCRIPTION - Preparing graphene-based hybrid flame retardant/shape memory polyurethane flame retardant composite material comprises (i) adding 1-50 pts. wt. graphene oxide and 10-150 pts. wt. deionized water into three-necked flask, and stirring vigorously under ultrasonic condition for 2 hours, then adding 1-50 pts. wt. commercial flame retardant solution dropwise into the above suspension, continue ultrasonic stirring for 2 hours, then transferring into autoclave, and reacting at 70-180 degrees C, then cooling naturally, separating the precipitate by suction filtration, washing using deionized water and ethanol, then placing the filter cake in vacuum oven, and drying for 24 hours to obtain graphene-based hybrid flame retardant, (ii) adding 1-50 pts. wt. polyester diol, 3-150 pts. wt. isocyanate-based monomer, 2-100 pts. wt. chain extender, organic solvent with 1-3 times of solid content, and 0.001-0.01 pts. wt. organic bismuth catalyst into three-necked flask with stirring device under nitrogen protection, and reacting at 50-80 degrees C for 2-6 hours to obtain polyurethane precursor, and (iii) subjecting graphene-based hybrid flame retardant to in situ suspension polymerization with polyurethane precursor in a mass percentage of 1-5%, and reacting at 60-80 degrees C for 2-6 hours under nitrogen gas protection to obtain final product.