▎ 摘　　要

NOVELTY - Reduced graphene oxide (rGO)/polyimide composite aerogel comprises reduced graphene oxide interpenetrated with sheet structure to form 3D conductive network structure and polyimide used as a supporting framework between reduced graphene oxide with sheet structure. USE - The aerogel is useful in electromagnetic wave absorbing material (claimed). ADVANTAGE - The aerogel: has increased conductivity due to porous structure on macroscopic scale which is suitable for absorption and attenuation of electromagnetic waves. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing reduced graphene oxide (rGO)/polyimide composite aerogel comprising adding 4,4'-diaminodiphenyl ether into N,N-dimethylacetamide solution, mixing, adding pyromellitic dianhydride, stirring continuously, adding reaction solution into water, allowing to react, filtering the resulting precipitate, washing, and drying in vacuum to obtain polyamic acid, (ii) adding polyamic acid obtained in step (i) into a mixed solution of triethylamine and water to obtain a polyimide precursor solution, then adding graphene oxide solution into polyimide precursor solution in a ratio of 1:4, allowing to react and carry out freeze-drying treatment and (iii) calcining the product after freeze-drying in an inert atmosphere to obtain the product.