▎ 摘　　要

NOVELTY - Lyocell fiber comprises 0.01-3 wt.% graphene grafted polysaccharide, where the fineness is 0.8-2.3 dtex, the dry strength of the Lyocell fiber is greater than or equal to 2.6 cN/dtex, dry stretch is greater than or equal to 9 wt.%, wet strength is greater than or equal to 2.1 cN/dtex, and wet stretch is greater than or equal to 10 wt.%. USE - The Lyocell fiber and graphene-grafted polysaccharide is useful for clothing, war industry and composite products (claimed). ADVANTAGE - The fiber: has excellent electrical and thermal conductivity, far-infrared and ultraviolet protection, excellent mechanical properties; and increases the added value of Lyocell fiber products. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the lyocell fiber, comprising (i) mixing graphene-grafted polysaccharide with aqueous solution of N-methylmorpholine-N-oxide to obtain mixture, (ii) adding the cellulose into a above mixture for premixing, placing in a thin film evaporator, dehydrating, and dissolving in vacuum to obtain spinning dope containing graphene, (iii) filtering the spinning dope obtained in the step (ii) and delivering to the spinning machine, and adopting dry-wet spinning to obtain Lyocell fiber.