▎ 摘　　要

NOVELTY - Preparing high-performance carbon nanotube/graphene airgel/polystyrene composite material comprises weighing carbon nanotubes and graphene oxide suspension, placing into container, ultrasonically dispersing, dispensing dispersion into weighing bottle, freeze-drying, mixing styrene monomer and azobisisobutyronitrile initiator, stirring, adding prepolymer mixture into airgel, filling airgel voids with above compounds and heating airgel filled with prepolymer mixture, in situ polymerizing and placing the above into mold, heating polystyrene glass transition, pressurizing and naturally cooling. USE - The method is useful for preparing high-performance carbon nanotube/graphene airgel/polystyrene composite material (claimed). ADVANTAGE - The method is simple and environmentally-friendly. The airogel has low density framework, high porosity and the composites made with polystyrene has higher strength and modulus than pure polystyrene. DETAILED DESCRIPTION - Preparing high-performance carbon nanotube/graphene airgel/polystyrene composite material comprises (i) preparing the carbon nano tube/graphene oxide air gel using improved Hummers method for preparing oxidized graphene suspension; (a) weighing carbon nanotubes and graphene oxide suspension prepared in step (i), placing into a container, ultrasonically dispersing for 3-4 hours and dispersing uniformly to obtain a dispersion; (b) dispensing the above dispersion into a weighing bottle and placing into the refrigerator, pre-freezing for 11-13 hours, and placing the pre-frozen gel into a freeze-dryer, freeze-drying for 36-60 hours; (ii) preparing carbon nanotubes/graphene oxide aerogels/polystyrene composite includes (a) mixing styrene monomer and azobisisobutyronitrile initiator and stirring uniformly to obtain prepolymer mixture, (b) adding prepolymer mixture dropwise into the airgel prepared in step (i), allowing for vacuum-assisted impregnation, filling all the airgel voids with the above compounds; and (c) heating the airgel filled with the prepolymer mixture, in situ polymerizing the carbon nanotubes / graphene airgel and the styrene monomer; and (iii) heating carbon nanotubes/graphene oxide aerogels/polystyrene composites and carbon nanotubes/graphene airgel/polystyrene composites prepared in step (ii), placing the above into a mold, heating to 30 degrees C, heating the polystyrene glass transition, pressurizing to 10% of compression composite and naturally cooled to room temperature.