Self-repairing conductive hydrogel material and preparation method thereof

Abstract

The invention provides a self-repairing conductive hydrogel material and a preparation method thereof. The method comprises the following steps: 1) adding pyrogallic acid into a dissolved borate solution, then adding polypyrrole powder after stirring, and conducting stirring until uniform dispersion is achieved so as to obtain a mixed solution; and 2) mixing the mixed solution with an acrylamide monomer, a cross-linking agent and tetramethylethylenediamine, conducting full stirring to completely dissolve the mixture to obtain a reaction system, adding glycerin and an initiator into the reaction system, and placing the reaction system at normal temperature to form gel. According to the invention, pyrogallic acid is oxidized under the action of oxygen and water to form dopaquinone substancesto provide a self-repairing capability, and carbon black-modified polypyrrole can be uniformly dispersed in water and provides conductive capability. The prepared hydrogel has the structural characteristics of good mechanical property, conductivity and self-repairability.

Description

technical field [0001] The invention belongs to the technical field of hydrogel materials, in particular to a self-healing conductive hydrogel material and a preparation method thereof. Background technique [0002] As a soft polymer material containing a three-dimensional network structure, hydrogel has been widely used in many fields. Among them, conductive hydrogel combines the advantages of conductive polymer and hydrogel, and is widely used in the field of biomaterials, laboratories Biosensors, biofuel cells, and supercapacitors have great application prospects. However, the strength and toughness of many hydrogels are not good enough to meet the application requirements. Moreover, once ordinary conductive hydrogels are mechanically damaged, their performance will be greatly affected. Therefore, the development of a conductive hydrogel material with a certain strength and self-repairing ability is of great significance for the application and development of hydrogels. ...

AI Technical Summary

Problems solved by technology

[0005] However, these self-healing conductive hydrogels still have some problems that cannot be ignored, such as insufficient mechanical strength, poor self-healing performance, and inconvenient preparation methods, etc.

And because the traditional hydrogen bond and acylhydrazone bond self-healing hydrogel completes the self-healing process by generating hydrogen bond and acylhydrazone bond, and the force strength of hydrogen bond and acylhydrazone bond is lower than that of catechols

In addition, there is another point that conductive fillers are generally insoluble in water, and the uniformity of their dispersion in the hydrogel is not enough, which directly affects the conductivity and mechanical properties of the conductive hydrogel.

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