▎ 摘　　要

NOVELTY - Biomass hydrogel comprises hydroxyethyl cellulose, polyvinyl alcohol, cellulose nanofiber, sodium hydroxide solution, graphene oxide, iron salt, epichlorohydrin and water, where the mass ratio of hydroxyethyl cellulose and polyvinyl alcohol is (0.6-0.8):1, the mass ratio of hydroxyethyl cellulose and cellulose nanofiber is (0.6-0.8): (0.4-0.5), the mass volume ratio of hydroxyethyl cellulose and sodium hydroxide solution is (0.6-0.8) g:(8-10) cm, the mass ratio of hydroxyethyl cellulose and graphene oxide is (0.6-0.8):(0.2-0.3), the mass ratio of hydroxyethyl cellulose to iron salt is (0.6-0.8):(1.1-1.2), the mass-to-volume ratio of hydroxyethyl cellulose and epichlorohydrin is (0.6-0.8) g:(1.1-1.3) ml, and the mass-to-volume ratio of hydroxyethyl cellulose and water is (0.6-0.8) g:(18-22) ml. USE - The biomass hydrogel is useful for forming glue, used as reinforcing material, and used in hydrogels, preferably for research its basic characteristics, such as swelling/swelling dynamics and balance, solute diffusion, volume deformation and sliding friction. ADVANTAGE - The method improves strength of hydrogel, ensures reversible bonding and breaking of coordination bonds, damages self-repair occurs after the hydrogel, adopts simple and efficient method, low technique requirement, does not requires special technique and equipments, and is suitable for large-scale preparation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the biomass hydrogel, involving (a) uniformly mixing hydroxyethyl cellulose, polyvinyl alcohol, cellulose nanofiber, sodium hydroxide solution, graphene oxide, iron salt and water to obtain a mixed solution, and (b) uniformly mixing epoxy chloropropane and mixed solution, and leaving to obtain biomass hydrogel.