Preparation method of flexible polyaniline conductive composite hydrogel material

A composite hydrogel and polyaniline-based technology, which is applied in the field of preparation of flexible polyaniline-based conductive composite hydrogel materials, can solve the problems of insufficient preparation methods, weakened electrochemical properties of conductive active materials, and insufficient mechanical strength of hydrogels and other problems, to achieve the effect of improving electrochemical performance and mechanical strength, low cost, and simple operation

Inactive Publication Date: 2017-06-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these conductive hydrogels still have some problems that cannot be ignored, such as the preparation method is not simple enough, the mechanical strength of the hydrogel is insufficient, the electrochemical performance of the conductive active material is weakened by the insulating framework material, etc.

Method used

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  • Preparation method of flexible polyaniline conductive composite hydrogel material
  • Preparation method of flexible polyaniline conductive composite hydrogel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, the in-situ polymerization of PAni hydrogel in PVA aqueous solution

[0015] Weigh 10g of PVA into a 250ml three-neck flask, add 90ml of deionized water, stir and swell at 35°C for 0.5h, transfer to a 95°C oil bath and stir to dissolve completely, then cool the PVA aqueous solution to 4°C; 5%, 7.5% and 10% three groups of PVA aqueous solutions respectively nine parts to different beakers, respectively add 2.3ml phytic acid (50%, 4 ℃) and stir evenly, then add aniline (distillation, 4 ℃) in every group of solutions ℃), aniline / phytic acid=2:1, 4:1, 6:1, stirred rapidly until the white precipitate disappeared, and obtained nine kinds of mixed solutions with different ratios of PVA, aniline and phytic acid; at 4°C, the Add APS solution (4°C) quickly, aniline / APS=1:1, 3:1, 5:1, stir vigorously, the solution gradually turns dark green, and the viscosity increases.

Embodiment 2

[0016] Embodiment 2, the preparation of flexible PVA-PAni composite hydrogel

[0017] Freeze the mixture of dark green PAni hydrogel and PVA aqueous solution at -20°C for 18 hours, the PVA crystallizes to form a three-dimensional porous network structure, and then place it at room temperature for 6 hours to fully thaw the water and amorphous PVA molecules, and cycle more than 3 times to form The flexible PVA-PAni composite hydrogel was soaked in deionized water for 3 days to remove unreacted small molecules and impurities to obtain a flexible polyaniline-based conductive composite hydrogel material.

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Abstract

The invention provides a preparation method of a flexible polyaniline conductive composite hydrogel material, and belongs to the technical field of functional polymer materials. According to the method, a flexible conductive material with good mechanical strength and electrochemical property is prepared by utilizing the properties and characteristics of polyatomic acid of phytic acid, by taking the phytic acid as an acid doping agent and a gel crosslinking factor and taking polyvinyl alcohol hydrogel as a skeleton. The method comprises the following steps: dissolving polyvinyl alcohol into water to form a solution and matching the solution with phenylamine and phytic acid at a proportion to form a solution A; dissolving initiating agent ammonium persulfate into water to form a solution B; quickly mixing the solution A and the solution B at a low temperature, so that in situ polymerization is performed on the phenylamine in a polyvinyl alcohol aqueous solution, so as to form phytic acid-doped polyaniline hydrogel; placing the phytic acid-doped polyaniline hydrogel into a refrigerator for freezing, so as to form the flexible polyaniline conductive composite hydrogel material by a cyclic freeze thawing. The flexible polyaniline conductive composite hydrogel material prepared by the method has good electrochemical property, mechanical strength and flexibility; the preparation method is simple, and the cost is low, and the preparation method has wide application prospect in the fields of flexible energy storage materials and biomedicine.

Description

technical field [0001] The invention relates to a preparation method of a flexible polyaniline-based conductive composite hydrogel material, belonging to the technical field of functional polymer materials. [0002] technical background [0003] In recent years, with the continuous improvement of people's requirements for portable electronic devices, energy storage devices for electronic devices such as wearable electronic devices, electronic skins, and implantable medical devices tend to be flexible and foldable. Supercapacitor is an important environment-friendly energy storage device. It has attracted much attention due to its high functional density, good cycle stability, and long service life. The key to the preparation of flexible supercapacitors is to prepare a flexible electrode material. Conductive hydrogel has a three-dimensional porous structure, which can provide a huge effective surface area and provide more channels for the transmission of electrolyte ions, so i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08L79/02C08K5/521C08G73/02
CPCC08G73/0266C08J3/075C08J2329/04C08J2379/02C08J2429/04C08J2479/02C08L29/04C08L79/02C08K5/521
Inventor 叶瑾郭子砚李雅瑜杨兆昆施冬健陈明清
Owner JIANGNAN UNIV
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