Mixed charge antifreeze hydrogel and preparation method thereof

Abstract

The invention discloses a mixed charge antifreeze hydrogel and a preparation method thereof. The present invention uses chemical methods to modify the polymer network to reduce the freezing point of the hydrogel to prepare a freeze-resistant and stable hydrogel, and provides a method to make the polymer of the hydrogel have antifreeze performance without adding water to the gel. The innovative idea of ​​adding additional antifreeze substances in the gel, the present invention introduces a variety of charged structures into the hydrogel polymer itself, so that by interfering with the water molecules to form a dense hydrogen bond structure, the formation of water contained in it is inhibited. ice process. The invention can solve the technical problem of how to make the polymer of the hydrogel have antifreeze performance without adding additional antifreeze substances into the hydrogel, so that the hydrogel has antifreeze performance.

Description

technical field [0001] The invention relates to the field of preparation of high molecular polymer materials, in particular to a hydrogel in which the polymer itself has an antifreeze function without adding additional antifreeze substances. The antifreeze performance can be achieved by the agent, and the present invention also relates to a preparation method for preparing the hydrogel. Background technique [0002] Hydrogel is a kind of high molecular polymer with a three-dimensional network structure and a large amount of water inside. It is a network structure formed by cross-linking the polymers with each other through chemical bonds or physical interactions, and small molecules are assembled through non-covalent bonds to form superpolymers. Molecular gel. The three-dimensional network structure of hydrogels endows them with solid-like morphological properties, and the diffusion and penetration of aqueous media make hydrogels have both the functions and properties of li...

AI Technical Summary

Problems solved by technology

However, this type of method has shown certain limitations in the actual application process.

For example, although the addition of salt ions can make the hydrogel have good electrical conductivity and biocompatibility while obtaining antifreeze properties, but in the course of long-term use, the hydrogel will dry out, resulting in an increase in the ion concentration, and the gel Unstable conductivity and other situations; adding water-soluble alcohols or ionic liquids can reduce the freezing point of the hydrogel through the hydrogen bond between the hydroxyl group and the water molecule, but the solute is easy to leak from the gel network, and the hydrogel poor stability

Images