▎ 摘　　要

NOVELTY - The composite material comprises 0.1-0.5% graphene oxides, polylactic acid and surface active agent. USE - Composite material. ADVANTAGE - The composite material has excellent heat, chemical and mechanical properties, melting index of 7.3-11, tensile strength of 67-75 megapascals, breaking elongation rate of 34-159 wt.%, and good flexibility and performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite material, which involves: (A) adding aqueous solution of graphene oxide in surfactant and an organic solvent under agitation to form a solution; (B) standing formed solution to obtain an organic solution of functionalized graphene; (C) mixing solution of polylactic acid and solvent with the functionalized graphene solution uniformly to give a master batch; and (D) mixing the masterbatch with pure polylactic acid melt to get the finished composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic microscope image of the composite material.