Method for preparing hydrogel based on metal coordination physical mixing and hydrogel

The invention provides a method for preparing hydrogel based on metal coordination physical mixing, which comprises the following steps: firstly, carrying out coordination on multivalent metal ions and polyphenol groups to form ligands, and then mixing the ligands with sodium alginate to form ionic bonds or hydrogen bonds so as to obtain stable and uniform hydrogel. The hydrogel is prepared by adopting a physical blending method, metal ions and polyphenol groups are coordinated firstly, the metal ions are wrapped by a substance rich in the polyphenol groups, then the metal ions and polyphenol ligands are mixed with sodium alginate, hydrogen bonds and ionic bonds are formed to be combined, and the stable and uniform hydrogel is prepared. 本发明提供一种基于金属配位物理混合制备水凝胶的方法，先将多价金属离子与多酚基团进行配位形成配位体，再将配位体与海藻酸钠混合形成离子键或氢键，得到稳定均匀的水凝胶。本发明采用物理共混方法制备水凝胶，先将金属离子与多酚基团配位，富含多酚基团的物质把金属离子"包裹"起来，然后再将此金属离子与多酚的配位体与海藻酸钠混合，形成氢键和离子键结合，制备稳定且均匀的水凝胶。