▎ 摘　　要

NOVELTY - The preparation method of a novel flame-retardant composite material involves: mixing graphene oxide with alkali, reacting at 800-950 ℃ for 2-3 hours under nitrogen, calcining, activating and reacting to obtain a product A, washing the product A, and carrying out freeze drying treatment to obtain porous graphene; adding 10-hydroxy-9-oxa-10-phosphaphenanthrene-10-oxide containing phosphoric acid, triethylamine and dichloromethane into a flask, uniformly mixing, adding ethylsulfonyl chloride into the flask, reacting for 4-6 hours to obtain a product B, washing, drying to obtain a product C, stirring the product C and 1-methylimidazole, cleaning, and precipitating to obtain a phosphorus-containing ionic liquid; and mixing the phosphorus-containing ionic liquid and the porous graphene at 80-90 ℃ for 45-60 minutes, and then carrying out ultrasonic treatment on the mixture to obtain the phosphorus-containing ionic liquid/porous graphene composite material. USE - Preparation method of a novel flame-retardant composite material for protective clothing. ADVANTAGE - The phosphorus-containing ionic liquid is not only on the surface of the porous graphene but also enters the porous structure of the porous graphene with a high specific surface area, and pi-pi stacking interaction exists between the phosphorus-containing ionic liquid and the porous graphene, so that the agglomeration among porous graphene particles is remarkably reduced. The agglomeration among the porous graphene particles is remarkably reduced, and the specific surface area of the porous graphene is increased. The composite material has higher comprehensive performance, not only has good flame retardance of the phosphorus-containing ionic liquid, but also has excellent chemical stability, and physical and mechanical properties endowed by the porous graphene. DETAILED DESCRIPTION - The preparation method of a novel flame-retardant composite material for protective clothing involves: mixing graphene oxide with alkali in a mass ratio of 1: 3-5, reacting at 800-950 ℃ for 2-3 hours under the protection of nitrogen, calcining, activating and reacting to obtain a product A, washing the product A, and carrying out freeze drying treatment to obtain porous graphene; adding 10-hydroxy-9-oxa-10-phosphaphenanthrene-10-oxide containing phosphoric acid, triethylamine and 250-450 mL dichloromethane into a flask, uniformly mixing, adding 1-1.5 mole ethylsulfonyl chloride into the flask, reacting for 4-6 hours to obtain a product B, washing, drying to obtain a product C, stirring the product C and 1-methylimidazole at 75-85 ℃ for 48-72 hours, cleaning, and precipitating to obtain a phosphorus-containing ionic liquid; and mixing the phosphorus-containing ionic liquid and the porous graphene in a mixed ratio of 13-18:100 at 80-90 ℃ for 45-60 minutes, and then carrying out ultrasonic treatment on the mixture to obtain the phosphorus-containing ionic liquid/porous graphene composite material. An INDEPENDENT CLAIM is included for the novel flame retardant composite material for protective clothing. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of a method for preparing a novel flame retardant composite material for protective clothing. (Drawing includes non-English language text).