▎ 摘　　要

NOVELTY - Preparing self-coloring graphene fiber involves mixing the concentrated sulfuric acid with concentrated phosphoric acid to obtain mixed solution, dropping into reaction container filled with graphite and potassium permanganate, stirring and oxidizing, putting the reaction container in the water bath, adding hydrogen peroxide, stirring, reacting for period of time to obtain oxidized graphene liquid, mixing the isophorone diisocyanate and polyethylene glycol uniformly, then adding catalyst to react for 1.5-2 hours at 70-75degrees Celsius, then adding dihydric alcohol to react for 2-2.5 hours, cooling to 60-65degrees Celsius, adding hydroxyl anthraquinone intermediate reaction for 2-2.5 hours to obtain self-coloring polyurethane, adding the self-coloring polyurethane prepared into the solvent to mix to obtain self-coloring polyurethane spinning solution. USE - Method for preparing self-coloring graphene fiber used for intelligent wearable fabric (claimed). ADVANTAGE - The self-coloring graphene fiber has good conductivity and sensing performance, good stability and environment-friendly property. DETAILED DESCRIPTION - Preparing self-coloring graphene fiber involves mixing the concentrated sulfuric acid with concentrated phosphoric acid to obtain mixed solution, dropping into reaction container filled with graphite and potassium permanganate, stirring and oxidizing, putting the reaction container in the water bath, adding hydrogen peroxide, stirring, reacting for period of time to obtain oxidized graphene liquid, mixing the isophorone diisocyanate and polyethylene glycol uniformly, then adding catalyst to react for 1.5-2 hours at 70-75degrees Celsius, then adding dihydric alcohol to react for 2-2.5 hours, cooling to 60-65degrees Celsius, adding hydroxyl anthraquinone intermediate reaction for 2-2.5 hours to obtain self-coloring polyurethane, adding the self-coloring polyurethane prepared into the solvent to mix to obtain self-coloring polyurethane spinning solution, adding the graphene dispersion liquid and the self-coloring polyurethane spinning solution prepared into the injection pump for coaxial wet spinning to obtain self-coloring oxidation graphene fiber, drying, adding reducing agent reducing, cleaning, and drying to obtain product.