▎ 摘　　要

NOVELTY - Carbon foam, is claimed. The carbon foam made of polyimide and graphene. USE - The foam is useful in thermal insulation and/or electromagnetic shielding material (claimed) and in important fields of aerospace and weapon equipment. ADVANTAGE - The foam is low in density and thermal conductivity, excellent in comprehensive performance and anisotropic. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for Preparing carbon foam comprising (i) adding polyamic acid and graphene oxide to water, adding organic base is added to stir and disperse uniformly to obtain water dispersion; (ii) pouring the aqueous dispersion into a mold, freeze-drying after using a freezing liquid, to obtain a freeze-dried sample; (iii) performing thermal imidization of the freeze-dried sample to obtain a composite foam; and (iv) carbonizing the composite foam obtained in step (3) to obtain composite carbon foam.