▎ 摘　　要

NOVELTY - A multilayer functionalized graphene nano hybrid material (I) obtained using polystyrene as hinge, is new. USE - New multilayer functionalized graphene nano hybrid material is used as nano filling material for preparation of heat-resistant flame-retardant polymer nano composite material. ADVANTAGE - The multilayer functionalized graphene nano hybrid material has excellent thermal stability, and is efficiently prepared with high yield by simple process. The polystyrene has excellent compatibility of the graphene material. DETAILED DESCRIPTION - A multilayer functionalized graphene nano hybrid material of formula (I) obtained using polystyrene as hinge, is new. N.B. The structure in claim 1 of the specification cannot be included because it is unclear. An INDEPENDENT CLAIM is included for preparation of multilayer functionalized graphene nano hybrid material, which involves dissolving flake graphite oxide solid powder in 7.5-15 mg/mL dimethylformamide, obtaining suspension, preparing carboxyl group-activated graphene oxide, adding solution of cyclodextrin, polystyrene and dimethylformamide, mixing, reacting, filtering the resultant reaction mixture under vacuum, washing and drying. The ratio of cyclodextrin and polystyrene in the solution of cyclodextrin, polystyrene and dimethylformamide is (50:1)-(1:50). The total content of cyclodextrin and dimethylformamide in the solution of cyclodextrin, polystyrene and dimethylformamide is 0.67-120 mg/mL.