▎ 摘　　要

NOVELTY - Preparing gelatin/microfibrillated cellulose/graphene conductive hydrogel, comprises (i) mixing graphene, microfibrillated cellulose, gelatin and water/organic binary solvent to obtain graphene/microfibrouscellulose/gelatin dispersion liquid, where the water/organic binary solvent is obtained by mixing water and organic solvent, and (ii) freezing and thawing the dispersion to obtain final product. USE - The gelatin/microfibrillated cellulose/graphene conductive hydrogel is useful in preparing a flexible sensor (claimed). ADVANTAGE - The hydrogel: has high flexibility, strength, stretchability, conductivity, frost resistance and moisture retention performance, biological compatibility and ventilation property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a a gelatin/microfibrillated cellulose/graphene conductive hydrogel, comprising microfibrillated cellulose and graphene are wrapped in the gelatin, where the mass ratio of gelatin to the microfibrillated cellulose to the graphene is 50-100:1-5:2-4 a gelatin/microfibrillated cellulose/graphene conductive hydrogel prepared by the preparation method; and a use method of flexible sensor comprising (1) preparing gelatin/microfibrillated cellulose/graphene conductive hydrogel into a flexible sensor, (2) fixing the flexible sensor on the surface of an object to be detected, and (3) connecting a power supply, and detecting the surface resistance change of the object during the movement.