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 loss of PLA-based cellulose nanofibers/graphene conductive composite membranes (CGP) at 300℃ are below 10%

which is 20% less than that for pure cellulose nanofibers

suggesting that the introduction of graphene can greatly enhance the thermal stability of cellulose nanofibers. PLA possesses special advantages of mechanical property and degradability. The tensile strength of the CGP increases by 15-23 times as compared with the CG

after being buried in soil for 5 weeks

the mass loss of PLA-based cellulose nanofibers/graphene conductive composite membranes(CGP) was 3.7%. Therefore

CGP has a promising application in the flexible conductive material field.