Metal coordination supramolecular hydrogel and preparation method thereof

The invention belongs to the field of high molecular materials and in particular relates to metal coordination supramolecular hydrogel and a preparation method thereof. The preparation method providedby the invention comprises the following step: a) crosslinking sodium chondroitin sulfate and iron salt in water to obtain the metal coordination supramolecular hydrogel. The sodium chondroitin sulfate and Fe are used as raw materials and are cross-linked in the water to form the supramolecular hydrogel. The method provided by the invention is simple to operate and rapid in gel formation speed; the raw materials are green, environmentally friendly and cheap; an organic solvent and expensive instruments and equipment are not needed in a preparation process; the prepared supramolecular hydrogel has very good adhesion and can be injected; the supramolecular hydrogel can be self-healed at room temperature, without the need of a healing promoting agent or stimulation of other external conditions; furthermore, the