Cellulose nanofibers/graphene conductive membrane(CG) was prepared by vacuum filteration and the as-prepared CG was then coated with polylactic acid(PLA). FT-IR results show that a certain interaction exists between graphene and cellulose nanofibers. The optimal condition is that the composite ratio of cellulose nanofibers to graphene is 1:2, the electrical conductivity is 12 S·cm-1, the tensile strength reaches 13.62 MPa and its hydrophilic angle is 80.6°. Thermogravimetric analysis(TGA) confirms the mass ...