▎ 摘　　要

NOVELTY - A graphene oxide hair dye comprises 20-40 pts. wt. graphene oxide-p-diphenylamine composite, 50-70 pts. wt. organic dye, 10-20 pts. wt. thickening agent, 10-30 pts. wt. organic solvent, 1-5 pts. wt. surfactant and 1-5 pts. wt. metal chelate. The preparation method of the graphene oxide-p-diphenylamine composite involves: (S1) using improved Hummers method to prepare graphene oxide; and (S2) adding graphene oxide prepared in step (S1) to deionized water, carrying out ultrasonic dispersion, adjusting the pH value with 1 mol/l potassium hydroxide solution, adding p-phenylenediamine to ethanol, reacting at 70-90 degrees C for 2-5 hours, cooling, then filtering and repeatedly washing the solids with ethanol. USE - Graphene oxide hair dye. ADVANTAGE - The graphene oxide hair dye has low cytotoxicity, and improves dyeing rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the graphene oxide hair dye, which involves adding organic dye to a reaction kettle, dissolving in organic solvent, then sequentially adding graphene oxide-p-diphenylamine composite, thickening agent, surfactant and metal chelate, uniformly stirring at 40-50 degrees C and reacting for 10 hours.