▎ 摘　　要

NOVELTY - Preparing graphene color-changing fiber comprises (i) taking low molecular weight polyolefin, graphene photochromic dye, auxiliary agent, fiber-forming polymer and additive, (ii) adding graphene photochromic dye and auxiliary agent to low molecular weight polyolefin, mixing uniformly and melting and granulating to obtain polyolefin photochromic masterbatch, and crushing and sieving the masterbatch at low temperature to obtain discolored powder, and (iii) firstly obtaining the color-changing fiber core material, and adding the fiber-forming polymer with additives as the skin layer, and preparing the color-changing fiber by melt spinning. USE - The method is useful for preparing graphene color-changing fiber. ADVANTAGE - The fiber has good performance, and suitable for various photochromic dyes. The method is simple, strong operability and high cost performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene color-changing fiber prepared according to above mentioned method.