▎ 摘　　要

NOVELTY - High strength polyethylene/graphene nano composite film is composed of high density polyethylene and reducing oxidation graphene. The mass percentage of the reducing graphene oxide is 0.02-0.6 wt.%. USE - High strength polyethylene/graphene nano composite film used in the field of thin film material. ADVANTAGE - The high strength polyethylene/graphene nano composite film has high axial tensile strength and modulus. The preparation process does not need chemical modification or chemical reagent, environment-friendly without pollution, simple operation, high efficiency, convenient to combine with the existing industrial processing method, and low cost, easy to popularize to continuous industrial production. The film has good filler dispersion state, and is filled with high-orientation string crystal structure with compact arrangement, under the synergistic effect of the two, the film exhibits excellent axial mechanical property. The needed nano-filler content is very low, the cost is low, and the melt stretching device can directly adopt the existing roller pulling mode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing high strength polyethylene/graphene nano composite film, which involves carrying out melt-blending high-density polyethylene pellets and reduced graphene oxide powder, extruding into a prefabricated film, the prefabricated film is heated to complete melting and the heat history is eliminated, then cooled to the stretching temperature for melt stretching, and then naturally cooled and solidified to obtain the polyethylene/graphene nanocomposite film.