Biodegradable self-repairing rubber elastomer as well as preparation method and application thereof

The invention discloses a biodegradable self-repairing rubber elastomer and a preparation method thereof, and belongs to the field of elastomer materials. The preparation method of the biodegradable self-repairing rubber elastomer comprises the following steps: adding the enzymolysis lignin and the itaconic acid into the lipoic acid by several times by adopting a melting method, respectively melting and blending, and cooling to obtain the rubber elastomer. According to the invention, enzymatic hydrolysis lignin is added into a polylipoic acid network to construct a rigid-flexible network structure, the enzymatic hydrolysis lignin has a rigid structure and a plurality of polar functional groups and can generate a hydrogen bond aggregation effect, and itaconic acid can prevent polylipoic acid from depolymerization and improve tensile strength; disulfide bonds and hydrogen bonds in the material can endow the material with self-repairing performance, the finally prepared elastomer has the advantages of being reco