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Preparation method of conductive hydrogel with high strength and toughness

A conductive hydrogel, hydrogel technology, applied in the field of hydrogel, can solve problems affecting application, low strength, toughness, etc.

Active Publication Date: 2021-07-09
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

PVA itself can form hydrogels through physical cross-linking, but its low strength, toughness, and gel transformation from solid to liquid at high temperatures seriously affect its application in wearable electronic devices, bionic medical engineering, etc. application

Method used

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  • Preparation method of conductive hydrogel with high strength and toughness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] (1) Add 1.9g of PVA to the dimethyl sulfoxide-water mixed solvent, fully dissolve at 110°C, cool down to 60°C and slowly drop in 0.1g of MBA and 0.005RM26 to fully dissolve, add 0.005g of KPS and stir evenly , degassing; pour the liquid into a mold, put it into a blast oven at 60°C for 6 hours, cool down to room temperature, freeze at -20°C for 24 hours, thaw at room temperature, replace the solution with deionized water, and change the water every 12 hours Continue for one week, remove DMSO;

[0009] (2) Soak the hydrogel in step (1) in 1mol / L NaCl aqueous solution for 12h, dry the hydrogel thoroughly at 30°C until the quality does not change, and re-swell it in 1mol / L NaCl aqueous solution, The resulting high-strength conductive PVA-based hydrogel.

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Abstract

The invention relates to a preparation method of conductive hydrogel with high strength and toughness, which comprises the following steps of: by taking dimethyl sulfoxide (DMSO) / water as a solvent, polyvinyl alcohol (PVA) as a hydrogel matrix, 4-(methylacryloyloxy) ethyl-1-benzoic acid (MBA) and 1, 4-di (5-hexenyloxy) benzene (RM26) as cross-linking agents, potassium persulfate (KPS) as an initiator and sodium chloride (NaCl) as a conductive medium, carrying out chemical and physical reaction, solvent replacement and salt impregnation to form the conductive PVA-based hydrogel with high strength and toughness. The tensile strength, the breaking point elongation and the conductivity of the hydrogel are respectively improved by 2.85 times, 1.52 times and 1.21 times compared with those of pure PVA conductive hydrogel.

Description

technical field [0001] The invention relates to the field of hydrogel, in particular to a preparation method of a high-strength conductive PVA-based hydrogel. Background technique [0002] Hydrogel is a water-swellable body with a three-dimensional network structure formed by physical or chemical cross-linking, which has the advantages of flexibility, water-richness, and good biocompatibility. Conductive hydrogels can be used to bionic electronic skin, wearable electronic devices and flexible sensors, showing good application prospects in biomedicine and tissue engineering. However, the poor mechanical properties of hydrogels greatly limit its application in these areas. application value. Therefore, the development of strong conductive hydrogels has become a research hotspot. [0003] Polyvinyl alcohol (PVA) has good biocompatibility and non-toxicity, and is widely used in industry, agriculture, medical treatment and other fields. PVA itself can form hydrogels through ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F261/04C08F222/38C08J3/24C08J3/075C08L51/00C08K3/16
CPCC08F261/04C08J3/243C08J3/075C08J2351/00C08K3/16C08F222/385
Inventor 宋晓峰韩立彬任亚君夏文龙曲瑞刘磊
Owner CHANGCHUN UNIV OF TECH