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

A composite hydrogel and polyvinyl alcohol technology, applied in the field of polyvinyl alcohol-polyaniline composite hydrogel and its preparation, can solve the problems of unstable hydrogel, poor biological metabolism, long-term toxicity, etc., and achieve excellent biological Effects of Compatibility, Ease of Operation, High Yield and Stability

Active Publication Date: 2019-09-13
NANJING UNIV OF POSTS & TELECOMM
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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 biologi

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

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Embodiment Construction

[0037]Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

[0038] The invention provides a self-healing hydrogel based on the composite of polyvinyl alcohol (Poly (vinyl alcohol), PVA) and polyaniline (PANI), as well as its preparation method and application. The composite hydrogel is formed by in-situ growth of polyaniline nanofibers in the three-dimensional network structure of the polyvinyl alcohol hydrogel. The self-healing performance is triggered by near-infrared light, and the polyaniline nanofiber's light-to-heat conversion characteristic can make the polyvinyl alcohol chain segment warm up and move, ...

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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 ...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L79/02C08J3/075C08G73/02
CPCC08G73/0266C08J3/075C08J2329/04C08J2379/02C08J2429/04C08J2479/02
Inventor 杨文静徐文雅王文王文珺汪联辉
Owner NANJING UNIV OF POSTS & TELECOMM
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