▎ 摘　　要

NOVELTY - Polymer/graphene aerogel composite foam material comprises graphene aerogel and thermoplastic polymer, where the graphene aerogel is used as skeleton, the thermoplastic polymer is attached to the three-dimensional network structure of the graphene aerogel, a cell having a closed cell structure on the thermoplastic polymer, the composite foam material is having a three-dimensional network structure connected to each other, and the content of the graphene aerogel in the composite foam is from 0.5-10 wt.%.. USE - Used as polymer/graphene aerogel composite foam material. ADVANTAGE - The method solves problem of agglomeration of graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the material, comprising (i) adding reducing agent to graphene oxide solution, mixing, reduce at 35-90 degrees C for 1-24 hours to obtain multiple reduced graphene oxide hydrogel, soaking with water or ethanol-aqueous solution for 2-7 days, freezing at -20 to -10 degrees C for 6-24 hours, freeze-drying in a freeze dryer for 36-72 hours, heating and reducing at 200-300 degrees C for 2-3 hours to obtain graphene aerogel, where the mass ratio of graphene oxide to reducing agent is 1:(1-10), or adding a solution of the aqueous polymer to the graphene oxide solution, mixing, allowing to stand at room temperature until the graphene oxide gelatinizes to obtain graphene oxide hydrogel, freezing at -20 to -10 degrees C for 6-24 hours, freeze-drying in a freeze dryer for 36-72 hours, and heating and reducing at 400-1000 degrees C for 0.2-2 hours to obtain graphene aerogel, where the mass ratio of the graphene oxide to aqueous polymer is 1:(0.1-10), the concentration of graphene oxide is 3-10 mg/ml, the carbon-oxygen ratio of graphene oxide is (1.4-3):1, and the size of the graphene oxide is 5-30 mu m, (ii) vacuuming and sufficiently removing air from the graphene aerogel, placing in 0.05-0.5 g/ml thermoplastic polymer solution, vacuuming and completely adhering the thermoplastic polymer to the three-dimensional network of graphene aerogel, and drying to obtain polymer/graphene aerogel composite, and (iii) rapidly depressurizing using a reaction kettle, passing gas, heating, pressurizing and converting the gas into a supercritical fluid, maintaining the aforementioned temperature and pressure, reducing the pressure to atmospheric pressure by a rapid pressure reduction method, when the supercritical fluid reaches saturation in the composite, cooling and forming, heating to place the polymer/graphene aerogel composite in the kettle, passing in the gas, heating and pressurizing, maintaining the aforementioned temperature and pressure, removing the foamed body by pressure relief, when the gas reaches saturation in the composite, placing the foamed body in an oil bath for 10-60 seconds, and cooling and shaping, where the temperature of the oil bath is higher than the temperature in the kettle.