▎ 摘　　要

NOVELTY - Preparation of heat-induced flexible photo-thermal phase change hydrogel involves (S1) melting hydrated salt at 70-90℃ to form transparent saline solution, (S2) adding hydrophilic polymer, crosslinking agent and graphene oxide in order to the transparent saline solution, magnetically stirring at 50-70℃ until dissolved to obtain uniform precursor solution, and (S3) adding initiator to the precursor solution, magnetically stirring, pouring into a mold, and reacting at 70-90℃ for 2 hours. USE - Preparation of heat-induced flexible photo-thermal phase change hydrogel used in skin heat management application (all claimed). ADVANTAGE - The heat-induced flexible photo-thermal phase change hydrogel has excellent thermal flexibility, high energy storage density, high stability, high photothermal conversion efficiency, and low cost.