A bionic environment-adaptive self-repairing coating as well as a preparation method and use thereof. The preparation method comprises: carrying out condensation polymerization on a first mixed reaction system comprising isocyanate and polyol to obtain a prepolymer; reacting a second mixed reaction system comprising a material containing a non-covalent hydrogen bond and/or a material containing a covalent bisulfide bond and the prepolymer to obtain a polyurethane material; and mixing the polyurethane material with a modified graphene material so that the modified graphene material is distributed in the polyurethane material in a parallel arrangement manner to obtain a composite coating with a nacreous layer structure, and then curing the composite coating to obtain the bionic environment-adaptive self-repairing coating. The bionic environment-adaptive self-repairing coating prepared in the present application has high ultimate tensile strength and excellent mechanical properties.

A polymer and use thereof, where the polymer includes at least a structural formula represented by Formula 1; in in Formula 1, R.sub.1 is selected from a substituted or unsubstituted C1-C30 alkyl and a substituted or unsubstituted C6-C60 aryl; R.sub.2 is selected from a substituted or unsubstituted polyether group, a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted C1-C30 alkoxy and *-b1-S-S-b2-*; b1 and b2 are each independently selected from a substituted or unsubstituted C2-C15 chain alkyl and a substituted or unsubstituted C6-C60 aryl; R.sub.3 is an ionic liquid group; and n1 and n is an integer. The special molecular structure of the polymer enables it to have excellent room temperature ionic conductivity when applied to a polymer electrolyte.