▎ 摘　　要

NOVELTY - Flame-retardant and wave-absorbing polyimide foam material comprises an electric loss type/magnetic loss type wave absorbing composite material, where the flame-retardant and wave-absorbing polyimide foam material has a porous structure. The electric loss type/magnetic loss type wave absorbing composite material is compounded in the polyimide foam. USE - Flame-retardant and wave-absorbing polyimide foam material for converting electromagnetic energy into heat energy through the interaction of the electric field. ADVANTAGE - The flame-retardant and wave-absorbing polyimide foam material preparation is simple and easy to control, which is conducive to realizing continuous industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing flame-retardant and wave-absorbing polyimide foam material, which involves: (A) mixing the dianhydride and the solvent, adding fatty alcohol to react to obtain a diacid diester solution; (B) re-reacting the diacid diester solution and diamine to obtain a polyamic acid solution, then adding foam stabilizer, compound catalyst and electric loss type/magnetic loss type wave absorbing composite material, stirring and mixing concentrate to remove the solvent and grinding to obtain a powdery product; and (C) putting the powdery product into a closed mold for foam molding, and then undergoing imidization to obtain a flame-retardant and wave-absorbing polyimide foam material.