Single-side adhesion hydrogel based on carboxymethyl cellulose-multivalent ion coordination and preparation method thereof

The preparation method comprises the following steps: firstly, taking acrylamide (Aam), carboxymethyl cellulose (CMC) and N-[tris (hydroxymethyl) methyl] acrylamide (THMA) as raw materials, and carrying out polymerization reaction to obtain initial hydrogel based on carboxymethyl cellulose; one side of the initial hydrogel is in contact with a salt solution of multivalent metal ions, and the single-side adhesion hydrogel based on carboxymethyl cellulose-multivalent ion coordination is obtained. The crosslinking degree of one side of the gel is increased through coordination crosslinking of CMC and multivalent ions so as to reduce the adhesion of the gel, and rich hydroxyl groups, acylamino groups and the like in CMC and Aam-THMA chain links on the other side can form a good adhesion effect with different substrates. In addition, rich carboxyl anions and sodium ions brought by CMC in the gel endow the gel with stable and good conductivity. 本发明涉及一种基于羧甲基纤维素-多价离子配位的单侧粘附水凝胶及其制备方法，本发明首先以丙烯酰胺(Aam)、羧甲基纤维素(CMC)、N-[三(羟