Mixed charge antifreeze hydrogel and preparation method thereof

Abstract

The invention discloses mixed charge antifreeze hydrogel and a preparation method thereof. A chemical method is utilized to modify a polymer network so as to reduce the freezing point of the hydrogel, the antifreeze and stable hydrogel is prepared, an innovative thought that the polymer of the hydrogel has anti-freezing performance, and additional antifreeze substances do not need to be added into the hydrogel is provided, a plurality of charged structures are introduced into the hydrogel polymer so that a dense hydrogen bond structure is formed by interfering water molecules, and the freezing process of water contained in the hydrogel polymer is inhibited. According to the invention, the technical problem of how to enable the polymer of the hydrogel to have the antifreeze property without adding extra antifreeze substances into the hydrogel can be solved, so that the hydrogel has the antifreeze property.

Description

technical field [0001] The invention relates to the field of high molecular polymer material preparation, in particular to a hydrogel in which the polymer itself has an antifreeze function and does not need to add additional antifreeze substances. agent to realize antifreeze performance, 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 cross-links the polymers through chemical bonds or physical interactions to form a network structure, and small molecules assemble through non-covalent bonds to form superstructures. molecular gel. The three-dimensional network structure of hydrogel endows it with morphological characteristics similar to solids, and the diffusion and penetration of aqueous media make hydrogels have both the functions and properties of liquids. Due to their excell...

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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

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