▎ 摘　　要

NOVELTY - A composite cellulose nanopaper is prepared by performing acid hydrolysis pretreatment of cellulose raw material, forming nano-cellulose wet film (CNF) having lignin content of 7-20%, slowly pouring graphene oxide dispersion on the CNF layer, performing vacuum suction filtration, drying, forming double-layer dry film of cellulose nanofibril composite graphene oxide (CNF/GO) dry film, reducing in aqueous phase, and drying. USE - Composite cellulose nanopaper. ADVANTAGE - The composite cellulose nanopaper has improved electrical conductivity, flexibility, strength, thermal conductivity and electromagnetic shielding function, and can be produced economically by simple method without affecting the environment.