Self-healing anti-freezing conductive fibroin hydrogel and preparation method thereof

Abstract

The invention discloses self-healing anti-freezing conductive fibroin hydrogel and a preparation method thereof, and belongs to the field of flexible electronic materials. The preparation method comprises the following steps: firstly, modifying pyrrole by adopting dopamine, polymerizing in an acid environment to obtain dopamine modified polypyrrole, then taking MAX powder as a raw material, etching under hydrofluoric acid and hydrochloric acid to obtain an MXene material, then respectively adding the dopamine modified polypyrrole and the MXene material into a polyvinyl alcohol aqueous solution, uniformly mixing, then adding a fibroin aqueous solution, further mixing, and finally, preparing the modified polypyrrole / MXene composite material. And finally, dropwise adding a mixed aqueous solution of borax and glycerol into the mixed solution to prepare the self-healing anti-freezing conductive fibroin hydrogel. The self-healing anti-freezing conductive fibroin hydrogel has the advantages of self-healing, freezing resistance, air permeability and good conductivity, overcomes the three defects of no freezing resistance, no self-healing and non-uniform conductive material distribution of common fibroin hydrogel, and has a wide application prospect in the field of flexible electronic products.

Description

technical field [0001] The invention belongs to the field of flexible electronic materials, and in particular relates to a self-healing antifreeze conductive silk fibroin hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a polymer with a three-dimensional network structure that has hydrophilic groups and can swell in water but is insoluble in water. It is an important functional polymer material and is one of the hotspots in current materials science research. One; the current hydrogel has been widely used in electronics, medical, cosmetics and other fields, especially in the growing demand for electronics. Traditional conductive hydrogels are generally formed based on conductive molecular polymers, such as polypyrrole, polyaniline, poly-3,4-ethylenedioxythiophene, etc. However, such hydrogels have poor mechanical properties and flexibility, which limits their use. Practical application; in order to overcome the poor mechanical characteris...

AI Technical Summary

Problems solved by technology

Traditional conductive hydrogels are generally formed based on conductive molecular polymers, such as polypyrrole, polyaniline, poly-3,4-ethylenedioxythiophene, etc. However, such hydrogels have poor mechanical properties and flexibility, which limits their use. Practical application; in order to overcome the poor mechanical characteristics of hydrogel, synthetic polymer acrylamide, acrylic acid, etc. will be used, but such composites do not have degradability in vivo; secondly, polymer solids and metal surfaces are hydrophobic and cannot be combined with Skin affinity and mutual compatibility; finally, solid polymer-based and metal-based epidermal electrodes will inhibit the effective discharge of gas and liquid, and long-term wearing will cause skin inflammation, itching and other symptoms, reducing wearing comfort, and sweat accumulated on the surface of the skin makes the Epidermal electrodes are difficult to achieve a close fit with the skin, which affects the transmission of high-quality signals

Secondly, the non-freeze resistance and self-healing properties of hydrogel further affect its application range.

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