Dual-network conductive hydrogel, preparation method thereof and flexible wearable electronic equipment

Abstract

The invention provides dual-network conductive hydrogel, a preparation method thereof and flexible wearable electronic equipment. The structure of the double-network conductive hydrogel is formed by interpenetrating a first network and a second network, the first network is a network formed by chemical crosslinking of acrylamide derivatives; the second network is a physical cross-linked network formed by interaction of a chitosan derivative and phytic acid. The invention provides the double-network conductive hydrogel integrating obdurability and moisturizing capacity, and the synergistic effect between the chemical cross-linked first network and the physical cross-linked second network is beneficial to improving the large stretchability and large elasticity of the hydrogel. In addition, a large number of free hydrogen ions released by phytic acid enable the hydrogel to have high conductivity. Therefore, the dual-network conductive hydrogel provided by the invention can also be used as a conductive substrate of flexible wearable electronic equipment.

Description

technical field [0001] The invention belongs to the technical field of polymer hydrogel materials, and in particular relates to a double-network conductive hydrogel, a preparation method thereof, and a flexible wearable electronic device. Background technique [0002] Chitosan is a natural biopolymer derived from nature. It is the only renewable basic polysaccharide polymer found. Chitosan is obtained through deacetylation of chitin. Chitin is a major structural component of the exoskeleton of vertebrates and is found in, for example, crustaceans, the cuticle of insects, and the cell walls of most fungi and algae. It is a biocompatible cationic polysaccharide widely used as a biological excipient. [0003] Chitosan is a natural polysaccharide isolated from the exoskeleton of crustaceans. It is generally insoluble in water, but the amino group in the molecular structure will be protonated in an acidic environment, making it water-soluble. In addition, chitosan has the chara...

AI Technical Summary

Problems solved by technology

[0005] On the one hand, for traditional hydrogels, the insufficient hydrophilicity of the polymer chain itself weakens the interaction between the polymer and water molecules, resulting in poor water retention properties.

When exposed to room temperature for a long time, the hydrogel will lose water greatly, so that its tensile properties and electrical conductivity will be greatly reduced or even lost.

Therefore, it is very necessary to solve the problem of water loss in traditional hydrogels; on the other hand, most of the existing chitosan hydrogel products have poor mechanical properties, which greatly limits their wide application.