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Method for preparing conductive polysaccharide compound hydrogel by adopting front-end polymerization of polysaccharide eutectic solvent mixture solution

A technology of deep eutectic solvent and mixture solution, which is applied in the field of preparation of functional polymer materials, and can solve the problems of using toxic organic solvents, long preparation time, and high energy consumption

Active Publication Date: 2021-06-01
HUBEI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above-mentioned defects, the present invention provides the purpose of preparing conductive composite hydrogels for photocuring or traditional free radical polymerization, which has the disadvantages of complex preparation steps or long preparation time, high energy consumption, and the use of toxic organic solvents.

Method used

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  • Method for preparing conductive polysaccharide compound hydrogel by adopting front-end polymerization of polysaccharide eutectic solvent mixture solution
  • Method for preparing conductive polysaccharide compound hydrogel by adopting front-end polymerization of polysaccharide eutectic solvent mixture solution
  • Method for preparing conductive polysaccharide compound hydrogel by adopting front-end polymerization of polysaccharide eutectic solvent mixture solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 7.2 grams of acrylic acid, 12 grams of urea and 14 grams of choline chloride, mix and stir at 85° C. until a transparent and clear liquid is formed to obtain a deep eutectic solvent. Then disperse 0.72 gram of guar gum in the above deep eutectic solvent to obtain mixed solution 1, then add 0.216 gram of divinylstyrene and 0.144 gram of ammonium persulfate to dissolve and form mixed solution 2, then pour mixed solution 2 into the test tube , Use an electric soldering iron to heat the upper end of the test tube to initiate the reaction. After the thermal initiation reaction begins, remove the heat source until all the raw materials in the test tube are converted into polymer gels. After measurement, the movement speed of the front end: 2.3 cm / min. Response time: 4.3 minutes. The composite hydrogel shows light red color, conductivity: 9.26×10 -3 mS / cm, compressive strength: 6.69MPa.

Embodiment 2

[0037] Weigh 8.6 grams of methacrylic acid, 19.2 grams of citric acid and 14 grams of choline chloride, mix and stir at 85° C. until a transparent and clear liquid is formed to obtain a deep eutectic solvent. Then disperse 1.29 grams of starch in the above deep eutectic solvent to obtain mixed solution 1, then add 0.258 grams of N,N'-methylenebisacrylamide and 0.172 grams of potassium persulfate to dissolve to form mixed solution 2, and then mix mixed solution 2 Pour it into a test tube, and use an electric soldering iron to heat the upper end of the test tube to initiate the reaction. After the thermal initiation reaction begins, remove the heat source until all the raw materials in the test tube are converted into polymer gels. After measurement, the movement speed of the front end: 2.2 cm / min. Reaction time: 4.5 minutes. The composite hydrogel shows reddish brown, conductivity: 1.29×10-2 mS / cm, compressive strength: 9.68MPa. .

Embodiment 3

[0039] Weigh 7.1 g of acrylamide, 9.2 g of glycerin and 33.9 g of tetrabutylphosphonium bromide, mix and stir at 85° C. until a transparent and clear liquid is formed to obtain the acrylic deep eutectic solvent. Then 1.42 gram of chitosan is dispersed in above deep eutectic solvent to obtain mixed solution 1, then add 0.071 gram of polyethylene glycol dimethacrylate and 0.0426 gram of azobisisobutyronitrile to dissolve and form mixed solution 2, then Pour the mixed solution 2 into the test tube, heat the upper end of the test tube with an electric soldering iron to initiate the reaction, and remove the heat source after the thermal initiation reaction starts until all the raw materials in the test tube are converted into polymer gels. After measurement, the speed of front end movement: 1.7 cm / min. Response time: 5.9 minutes. The composite hydrogel shows light yellow color, conductivity: 1.23×10 -2 mS / cm, compressive strength: 11.2MPa.

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Abstract

The invention provides a method for preparing conductive polysaccharide composite hydrogel by adopting front-end polymerization of a polysaccharide eutectic solvent mixture solution. The method comprises the following steps of: mixing a polymerizable hydrogen bond donor, a non-polymerizable hydrogen bond donor and a hydrogen bond acceptor according to a certain proportion, stirring and heating until a clear eutectic solvent liquid is formed; then adding polysaccharide solid powder, fully stirring, and standing; dissolving or dispersing a cross-linking agent and an initiator in the mixture to form a polymerizable cross-linked polysaccharide eutectic solvent liquid mixture solution; and transferring the mixture solution into a test tube, heating at the upper end of the test tube by adopting a heat source at room temperature to initiate polymerization reaction, and finally obtaining the conductive polysaccharide composite hydrogel. The deep eutectic solvent chemistry and the front-end polymerization technology are combined, one-step rapid preparation of the conductive polysaccharide composite hydrogel is achieved, and the prepared conductive polysaccharide composite hydrogel has high conductivity and compressive strength and has a wide application prospect in the field of flexible electronic materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer materials, and in particular relates to a method for preparing a conductive polysaccharide composite hydrogel by front-end polymerization of a low eutectic solvent polysaccharide mixture solution. Background technique [0002] Conductive polymer hydrogels can be used to fabricate flexible and sensitive devices due to their good electrical conductivity, ductile bending and self-healing. In recent years, the development of multifunctional hydrogels with low cost, good biocompatibility and high mechanical properties has become a research hotspot. However, the mechanical properties of traditional polymer hydrogels are poor, and their mechanical properties need to be enhanced. As a natural polymer with a wide range of sources, polysaccharides are cheap, biodegradable, and renewable. It is used to make bio-based conductive composite hydrogel, which has important practical sig...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F212/36C08F222/38C08F220/56C08F291/06C08F251/02C08F220/58C08F222/02C08F220/20
CPCC08F251/00C08F290/062C08F251/02C08F220/06C08F212/36C08F222/385C08F220/56C08F220/585C08F222/02C08F220/20
Inventor 李胜方邹涛陈亚鹏
Owner HUBEI POLYTECHNIC UNIV
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