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Conductive hydrogel as well as preparation method and application thereof

A conductive hydrogel and micelle technology, which is applied in the field of conductive hydrogel and its preparation, can solve the problems of poor mechanical properties, inability to meet stress conditions, and limited development, so as to ensure no damage, excellent ion conductivity, Effect of High Sensitivity Stress-Strain Sensing Performance

Pending Publication Date: 2020-04-21
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing ionic conductive hydrogels cannot meet the complex stress conditions in practical application scenarios due to their poor mechanical properties, which greatly limits their development.

Method used

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  • Conductive hydrogel as well as preparation method and application thereof
  • Conductive hydrogel as well as preparation method and application thereof
  • Conductive hydrogel as well as preparation method and application thereof

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preparation example Construction

[0059] According to one embodiment of the present application, a method for preparing a high-strength stretchable conductive hydrogel is provided, wherein the method at least includes the following steps:

[0060] 1) Dissolving the block copolymer in water under anaerobic conditions to form a stable micellar solution;

[0061] 2) Dissolving the polysaccharide in the micellar solution, stirring evenly, adding monomer and initiator to form a uniform solution;

[0062] 3) Initiate the mixed solutions obtained in step 2 respectively, first form a physically cross-linked polysaccharide network, and then initiate monomer polymerization, and continue to form a physically cross-linked polymer second network on the basis of the formed first network;

[0063] 4) Soak the gel obtained in step 3 in the metal ion solution, and further strengthen the second network through ion complexation;

[0064] 5) Soak the gel obtained in step 4) in a large amount of deionized water to remove excess m...

Embodiment 1

[0066] Preparation of double network hydrogels

[0067] 1) Dissolve 0.220 g of acryloyl Pluronic F127 (F127DA) in 15.895 g of water under a nitrogen atmosphere, stir and dissolve evenly with a magnetic stirrer until a clear and transparent solution is obtained, and then sonicate to obtain a stable micellar solution.

[0068] 2) Add 0.5g of carrageenan powder, 0.03g of potassium chloride, 3.1g of acrylamide monomer, 0.157g of acrylic acid and 0.098g of photoinitiator 2595 to the micellar solution in step 1), and stir and dissolve the mixture at 90 degrees Celsius until A homogeneous viscous liquid was obtained.

[0069] 3) The viscous liquid obtained in step 2) is first cooled to 4 degrees Celsius and kept for 30 minutes to promote the formation of the carrageenan double helix and form the first physically cross-linked network. Then the gel was irradiated with ultraviolet light (6W) for 3 hours, and free radicals initiated monomer polymerization to form a second network.

[0...

Embodiment 2

[0072] Preparation of double network hydrogels

[0073] 1) Dissolve 0.220 g of acryloyl Pluronic F127 (F127DA) in 15.895 g of water under a nitrogen atmosphere, stir and dissolve evenly with a magnetic stirrer until a clear and transparent solution is obtained, and then sonicate to obtain a stable micellar solution.

[0074] 2) Add 0.5g of carrageenan powder, 0.03g of potassium chloride, 3.1g of acrylamide monomer, 0.157g of acrylic acid and 0.0033g of thermal initiator KPS to the micellar solution in step 1), and stir and dissolve the mixture at 90 degrees Celsius until A homogeneous viscous liquid was obtained.

[0075] 3) The viscous liquid obtained in step 2) is first cooled to 4 degrees Celsius and kept for 30 minutes to promote the formation of the carrageenan double helix and form the first physically cross-linked network. Then, it was placed in a constant temperature water bath at 60°C for 12 hours, and free radicals initiated monomer polymerization to form a second n...

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Abstract

The invention discloses conductive hydrogel. The conductive hydrogel comprises a double-network structure, wherein a first network is a physically cross-linked polysaccharide network; the second network is a polymer network; the polymer network is cross-linked through micelles. The conductive hydrogel has high-strength tensile property and good stress-strain sensing property, and can be used as various flexible sensing devices.

Description

technical field [0001] The application relates to a conductive hydrogel and its preparation method and application, belonging to the field of polymer hydrogel. Background technique [0002] In recent years, flexible and stretchable devices have been widely used in the fields of electronic skin and implantable devices. Conventional flexible and stretchable devices are based on elastomer mixtures and conductive fillers, however, problems such as mismatch of mechanical properties, possible electrochemical reactions, and biocompatibility limit the application of traditional flexible electronic devices. Compared with polymer elastomers, hydrogels have attracted extensive attention in the field of flexible electronic devices because of their advantages such as high stretchability, biocompatibility, tunable strength, and toughness. Conductive hydrogels can be roughly divided into three categories according to different conductive mechanisms. The first category is conductive polyme...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L33/26C08L5/00
CPCC08J3/075C08J2333/26C08J2405/00
Inventor 周林杰徐婷裴欣洁付俊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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