▎ 摘　　要

NOVELTY - A graphene/ultra-high-molecular-weight polyethylene composite fiber comprises 0.05-5 wt.%, preferably 2-4 wt.%, more preferably 2.5-3.2 wt.% graphene with respect to ultra-high-molecular-weight polyethylene having average molecular weight of 1000000-8000000, preferably 4000000. The graphene is a monolithic or multilayer structure graphene powder having diameter is 0.2-10 mu m, thickness of 0.5-30 nm and specific surface area of 200-1000 m2/g. The graphene powder is an alkyl-modified graphene powder. USE - Graphene/ultra-high-molecular-weight polyethylene composite fiber is used for preparing shear cut-resistant material e.g. cut-proof glove, and shock absorbing material e.g. bullet-proof armor, bullet-proof helmet or mono-plugging preventing plate. ADVANTAGE - The graphene/ultra-high-molecular-weight polyethylene composite fiber has high mechanical strength, tensile strength of 29 cN/dtex and tensile modulus of 1300 cN/dtex. The mechanical property of the composite fiber is controlled by changing the proportion of graphene and ultra-high-molecular-weight polyethylene powder. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene/ultra-high-molecular-weight polyethylene composite fiber, which involves adding oily dispersant to a solvent, stirring to dissolve, adding graphene powder to the solvent, mechanically dispersing, obtaining graphene dispersion, dissolving ultra-high-molecular-weight polyethylene powder in the solvent, obtaining ultra-high-molecular-weight polyethylene solution, mixing graphene dispersion with the ultra-high-molecular-weight polyethylene solution, spinning mixed solution, extracting by solvent and drawing.