Polyvinyl alcohol-polyaniline composite hydrogel, and preparation method and application thereof

Abstract

The invention discloses a polyvinyl alcohol-polyaniline composite hydrogel, and a preparation method and an application thereof. The composite hydrogel comprises a polyvinyl alcohol hydrogel and polyaniline nanofiber, wherein the polyaniline nanofiber is compounded in the three-dimensional network structure of the polyvinyl alcohol hydrogel through a manner of in-situ polymerization; the method ofin-situ polymerization is as follows: an aniline monomer is induced by an oxidant to the surface of the three-dimensional network structure of the polyvinyl alcohol hydrogel to form a nanofiber structure with a diameter in a range of 10 to 40 nm through a nucleation grafting process in an acidic environment; the composite hydrogel can utilize the photothermal conversion characteristic of polyaniline fiber to raise a temperature to 50 DEG C or above by conversion of light energy into heat energy; and a polyvinyl alcohol chain segment moves to realize intermolecular hydrogen bond recombinationand realize self-healing of induction through remote control of near-infrared light. The composite hydrogel provided by the invention has simple design, simple and convenient operation, uniform and stable system, good biological compatibility, and great potential when being used as a biomedical material.

Description

technical field [0001] The invention relates to a polyvinyl alcohol-polyaniline composite hydrogel and a preparation method and application thereof, which can be used in the technical field of biopolymer materials. Background technique [0002] As a representative soft material, hydrogel has a wide range of applications in surface coatings, biomedical materials, tissue engineering, etc. However, traditional hydrogels are susceptible to stress-induced damage, and further expansion of the damage site will affect the integrity of the hydrogel network structure, resulting in the loss of hydrogel function and limiting its service life. Researchers have shown great interest in developing hydrogel materials with rapid self-healing function (Advanced Materials, 2016, 28(41): 9060-9093). Thermal stimulation is one of the most important stimuli to induce self-healing behavior, shorten self-healing time, or improve self-healing efficiency, usually by inducing the generation of mobile ...

AI Technical Summary

Problems solved by technology

Among them, the simple physical doping method is used in the construction of most materials, resulting in unstable and inhomogeneous hydrogels.

Moreover, when used as biological materials, these inorganic photothermal materials have problems that cannot be ignored, such as difficult degradation, poor biological metabolism, and long-term toxicity.

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