High-strength self-repair three-network hydrogel preparation method

Abstract

The invention relates to a high-strength self-repair hydrogel preparation method, which comprises: 1, preparing a polyvinyl alcohol, agar and acrylic acid composite solution; and 2, preparing a high-strength self-repair three-network hydrogel. According to the present invention, the high-strength hydrogel is prepared by using the one-pot method through polymerization, cooling and freezing-thaw cycle, wherein the three polymers provide the effects of hydrogen bonding and macromolecular entanglement so as to make the hydrogel have high mechanical strength; during the preparation, iron ions are added, and can form the good coordination effect with the carboxyl group of the polyacrylic acid, such that the hydrogel has good self-repair property; the prepared polyacrylic acid / agar / polyvinyl alcohol three-network hydrogel has advantages of high mechanical strength and good self-repair performance, simple preparation process, wide raw material source, low cost and environmental protection, andcan be used as tissue engineering, scaffold repair materials, agricultural sensors and the like, and can be widely used in biomedical materials, agricultural materials and other fields.

Description

technical field [0001] The invention belongs to the field of hydrogel preparation, and in particular relates to a preparation method of high-strength self-repairing hydrogel. Background technique [0002] Hydrogel is a polymer material with a three-dimensional network structure formed by chemical cross-linking or physical cross-linking. The polymer network contains a large amount of water and is soft to the touch and can maintain a certain shape. This characteristic has many similarities with biological soft tissues. . As a wet and soft material, hydrogel is very similar to some organs and tissues of the human body in many aspects, so it shows good application prospects in biomedical fields such as tissue repair materials, artificial muscles, biosensors and drug carriers. . However, traditional synthetic hydrogels often exhibit low mechanical properties and are brittle and brittle, which cannot meet the practical application requirements of hydrogels in many fields. Moreo...

AI Technical Summary

Problems solved by technology

Although their reported hydrogels have good mechanical properties, their hydrogels do not have good self-healing properties or even exhibit self-healing properties.

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