▎ 摘　　要

NOVELTY - Method for preparing polyimide aerogel, involves (a) uniformly stirring 4,4'-diaminodiphenyl ether and N-methyl-2-pyrrolidone solution, completely dissolving, adding 3,3',4,4'-biphenyl tetracarboxylic dianhydride, and uniformly stirring and mixing to obtain solution (A), (b) taking 1,3,5-tris (4-aminophenoxy) benzene and N-methyl-2-pyrrolidone solution, and uniformly stirring and dissolving to obtain solution (B), (c) adding obtained solution (B) and graphene oxide to solution (A) while stirring, continuously stirring for uniformly mixing obtained solution (B), solution (A) and graphene oxide, sequentially adding acetic anhydride, and pyridine, leaving still and aging to obtain polyimide wet gel, (d) placing the polyimide wet gel in acetone solution for replacement, soaking in ethylene glycol solution for solvent exchange, repeating several times, and freeze drying to obtain polyimide aerogel. USE - Method for preparing polyimide aerogel.