▎ 摘　　要

NOVELTY - Dispersion liquid comprises reduced graphene oxide and cellulose nano-crystals. USE - Used as a dispersion liquid. ADVANTAGE - The method does not require a surfactant. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing dispersion liquid, comprising (i) carrying out ultrasonic dispersion of 1-10 mg/ml cellulose nano-crystals, and stratifying, to obtain an upper cellulose nano-crystals layer and aqueous graphene oxide; (ii) uniformly stirring, and adding a reducing agent for the reduction of graphene oxide, then filtering by suction, washing, dispersing the filtered product in water, to obtain a primary aqueous dispersion of reduced graphene oxide; and (iii) continuously dispersing the step (ii) product, centrifuging, washing to remove free cellulose nano-crystals, to obtain the final product.