▎ 摘　　要

NOVELTY - Preparing polyethylene conductive composite material with graphene grafted on the surface comprises (i) processing graphene oxide by hydrochloric acid, heating and stripping; (ii) ultrasonically dispersing carboxylated graphene with N, N-dimethyl amide, adding propiolic alcohol, N,N'-dicyclohexylcarbodiimide and 4-dimethylaminopyridine, keeping in a water bath at 25-35 degrees C for 20-30 hours, centrifuging and washing, and vacuum drying; (iii) reacting ethylene gas and diethyl zinc as reactants, iron pyridine diimide as a catalyst, and methyl alane as a co-catalyst in a polymerization reactor; (iv) reacting hydroxy-terminated polyethylene, p-toluenesulfonyl chloride and sodium azide as reactants, and n-butyllithium as a catalyst; and (v) adding alkynyl graphene and azido-terminated polyethylene to N,N dimethylamide solvent, heating and reacting with cuprous sulfate and sodium ascorbate, centrifuging and purifying, vacuum degassing and curing the product in polytetrafluoroethylene mold. USE - The method is useful for preparing polyethylene conductive composite material with graphene grafted on surface. ADVANTAGE - The method prepares polyethylene conductive polymer with good dispersibility in the polyethylene substrate, improves the conductivity and antistatic property of the material, and greatly improves the excellent mechanical property of graphene tensile strength of the polyethylene. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of the polymerization reaction kettle.