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Method for preparing electrically conductive hydrogel

A technology of conductive hydrogel and conductive monomer, which is applied in the field of preparation of conductive hydrogel, can solve the problems of poor mechanical properties and electrochemical properties of conductive hydrogel, achieve excellent mechanical properties and electrochemical properties, and excellent electrical properties. Chemical performance and the effect of less raw material usage

Active Publication Date: 2018-11-13
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a preparation method of conductive hydrogel to solve the problem of poor mechanical properties and electrochemical properties of the existing conductive hydrogel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 0.6 g polyvinyl alcohol into 10 mL 1 mol / L (10.1 g) hydrochloric acid aqueous solution, at 85 o Stir at C for 30 minutes to obtain a uniform and stable dispersion; then add 200 μL (0.2 g) aniline and 500 μL (0.483 g) tetrabutyl titanate, respectively, and stir until uniformly dispersed; then add the initiator 5 wt% ammonium persulfate 100 μL (0.005 g) of aqueous solution, stirred evenly and placed at -18 o C refrigerator for 48 hours to obtain the hybrid hydrogel with high mechanical and electrical properties. The compressive strength of the gel is 10.3 MPa, and the specific capacitance is 408 F / g.

Embodiment 2

[0027] The tetrabutyl titanate in Example 1 was replaced with isopropyl titanate (0.397 g), and other conditions were the same, the compressive strength of the prepared hydrogel was 0.03 MPa, and the specific capacitance was 408 F / g.

Embodiment 3

[0029] The tetrabutyl titanate in Example 1 was replaced with titanium tetrachloride (0.266 g), and other conditions were the same, the compressive strength of the prepared hydrogel was 0.05 MPa, and the specific capacitance was 114 F / g.

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Abstract

The invention discloses a method for preparing electrically conductive hydrogel. The method includes steps of (1), uniformly dispersing hydrophilic monomers or hydrophilic polymers in hydrochloric acid aqueous solution to obtain stable dispersion liquid, adding electrically conductive monomers and metal alkoxide into the dispersion liquid and uniformly stirring the electrically conductive monomers, the metal alkoxide and the dispersion liquid; (2), adding initiators and catalysts into mixed liquid obtained at the step (1), uniformly mixing the initiators, the catalysts and the mixed liquid with one another and then carrying out reaction at the temperature ranging from -20 DEG C to 50 DEG C for 24-72 hours. The electrically conductive hydrogel can be obtained after the reaction is completely carried out. The mass of the electrically conductive monomers is 1-20% of the mass of the hydrochloric acid aqueous solution, is 20-100% of the mass of the metal alkoxide and is 0.2-85% of the massof the hydrophilic monomers or the hydrophilic polymers. The mass of the initiators is 0.5-5% of the mass of the electrically conductive monomers, and the mass of the catalysts is 0.01-5% of the massof the hydrophilic monomers. Compared with existing methods, the method has the advantages that the electrically conductive hydrogel prepared by the aid of the method is excellent in mechanical property and electrochemical performance and can be prepared at one step, and the method includes simple processes for preparing the electrically conductive hydrogel and is low in raw material usage.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a preparation method of conductive hydrogel. technical background [0002] Hydrogel is a soft material composed of water and a three-dimensional polymer network. The cross-linking points in the network are chemical cross-linking points formed by covalent bonds or non-covalent interactions such as ionic bonds, hydrogen bonds, hydrophobic interactions, and coordination interactions. Bonds form physical cross-links. Because of its soft and wet properties similar to biological tissues, it has important application prospects in the fields of drug delivery, biosensors and actuators, and biomimetic smart materials. [0003] Conductive hydrogels combine the dual characteristics of hydrogels and conductive substances. Under the premise of maintaining dimensional stability, they can have different conductivity ranges, so they can be used in biomedicine, tissue engin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08L79/02C08K3/22C08G73/02C08L71/02C08G73/06C08G61/12C08F120/56C08F220/06C08F220/56C08F220/54
CPCC08F120/56C08F220/06C08G61/126C08G73/0266C08G73/0611C08G2261/11C08G2261/3247C08J3/075C08J2329/04C08J2333/02C08J2333/26C08J2371/02C08J2465/00C08J2479/02C08J2479/04C08K3/22C08K2003/2241C08K2201/011C08F220/56C08F220/54
Inventor 杜娟佘小红朱雯莉李晓玉刘嘉钰李明田
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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