Two-field coupling cross-linked injectable, moldable and printable particle hydrogel material, and preparation method and application thereof

The invention belongs to the field of material science and the field of biomedical materials, and particularly relates to an injectable, moldable and printable particle hydrogel material which is double-crosslinked by non-covalent bonds and covalent bonds, and a preparation method and application thereof. Gelatin particles or particles with core-shell structures are used as basic structure units, a continuous and porous particle network is formed through reversible non-covalent cross-linking and covalent bond cross-linking among the particles, and the gelatin particles or the particles with the core-shell structures are reversibly self-assembled under the action of non-covalent bonds to form the continuous porous particle network, so the injectable, printable, moldable and self-repairing performances are realized; and further covalent bond crosslinking is initiated to form the high-strength granular hydrogel. The material can be used as a drug sustained-release carrier, a tissue engineering scaffold and a tis