Ionic conductive hydrogel and preparation method and application thereof

A technology of ion conduction and hydrogel, applied in the application, measurement of the property and force of applied piezoelectric resistance materials, electromagnetic measurement devices, etc., can solve the problem of low mechanical strength and elasticity, and cannot fully meet the practical application requirements of flexible electronic devices and other issues, to achieve the effect of high mechanical strength, good practical development value, and excellent mechanical properties

Inactive Publication Date: 2021-04-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although ion-conducting hydrogels can maintain high conductivity through ion transport, their mechanical strength and elasticity are still relatively low, which cannot fully meet the practical application requirements of flexible electronic devices.

Method used

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  • Ionic conductive hydrogel and preparation method and application thereof
  • Ionic conductive hydrogel and preparation method and application thereof
  • Ionic conductive hydrogel and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of ion conductive hydrogel, its preparation method comprises the following steps:

[0054]1) Add 4g of gelatin, 6g of acrylamide and 0.15g of aldylated β-cyclodextrin into 30mL of deionized water, then add 0.004g of N,N-methylenebisacrylamide and 8g of NaCl, Control the stirring speed to 380rpm, and stir at 60°C until the solids are completely dissolved to obtain a viscous solution;

[0055] 2) Add 0.04 g of ammonium persulfate and 40 μL of tetramethylethylenediamine into the viscous solution, then pour the viscous solution into a mold, and cure at 60° C. for 3 hours to obtain an ion-conductive hydrogel.

[0056] Performance Testing:

[0057] 1) The ion-conducting hydrogel prepared in Example 1 was cut into test samples with a thickness of 1mm, 2mm, 3mm, 4mm and 5mm, and a UV-ultraviolet instrument was used to test the light transmission performance. The test results were as follows: figure 1 shown.

[0058] Depend on figure 1 It can be seen that the light tr...

Embodiment 2

[0063] A kind of ion conductive hydrogel, its preparation method comprises the following steps:

[0064] 1) Add 4g of gelatin, 6g of acrylamide and 0.3g of aldylated β-cyclodextrin into 30mL of deionized water, then add 0.004g of N,N-methylenebisacrylamide and 8g of NaCl, Control the stirring speed to 380rpm, and stir at 60°C until the solids are completely dissolved to obtain a viscous solution;

[0065] 2) Add 0.04 g of ammonium persulfate and 40 μL of tetramethylethylenediamine into the viscous solution, then pour the viscous solution into a mold, and cure at 60° C. for 3 hours to obtain an ion-conductive hydrogel.

[0066] Performance test (test with reference to the method of embodiment 1):

[0067] Test results: the elongation at break of the ion-conductive hydrogel of Example 2 is 1151%, the tensile strength is 172 kPa, the compressive strength is 508 kPa, and the electrical conductivity is 0.4695 S / cm.

Embodiment 3

[0069] A kind of ion conductive hydrogel, its preparation method comprises the following steps:

[0070] 1) Add 4g of gelatin, 6g of acrylamide and 0.45g of aldylated β-cyclodextrin into 30mL of deionized water, then add 0.004g of N,N-methylenebisacrylamide and 8g of NaCl, Control the stirring speed to 380rpm, and stir at 60°C until the solids are completely dissolved to obtain a viscous solution;

[0071] 2) Add 0.04 g of ammonium persulfate and 40 μL of tetramethylethylenediamine into the viscous solution, then pour the viscous solution into a mold, and cure at 60° C. for 3 hours to obtain an ion-conductive hydrogel.

[0072] Performance test (test with reference to the method of embodiment 1):

[0073] Test results: the elongation at break of the ion-conductive hydrogel of Example 3 is 1274%, the tensile strength is 209 kPa, the compressive strength is 538 kPa, and the electrical conductivity is 0.3945 S / cm.

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Abstract

The invention discloses ionic conductive hydrogel and a preparation method and application thereof. The ionic conductive hydrogel comprises gelatin, aldehyde beta-cyclodextrin, polyacrylamide and inorganic salt, and the preparation method comprises the following steps: 1) adding water into the gelatin, the acrylamide and the aldehyde beta-cyclodextrin to prepare a solution, adding a cross-linking agent and the inorganic salt, and stirring for dissolving to obtain a viscous solution; and 2) adding an initiator and a catalyst into the viscous solution, pouring the viscous solution into a mold, and curing to obtain the ionic conductive hydrogel. The ionic conductive hydrogel has the advantages of high conductivity, high mechanical strength, high linear sensitivity, high reliability, bacteriostasis and the like, is simple in preparation process, and has a very good application prospect.

Description

technical field [0001] The invention relates to the technical field of sensing materials and sensors, in particular to an ion-conductive hydrogel and its preparation method and application. Background technique [0002] Flexible electronic devices (including circuits, sensors, electrodes, chips, liquid crystal displays, energy storage devices, etc.) The essential. At present, commonly used metal materials, carbon materials, conductive polymers and other materials are usually rigid or have limited stretching ability, and the electrical conductivity of the prepared electronic devices will drop rapidly after being deformed under stretching or bending conditions, making it difficult to Meeting the performance requirements of flexible electronics requires the development of new materials. [0003] Ionically conductive hydrogel is a semi-solid ion conductor with good mechanical properties and excellent electron and ion transport capabilities, making it an ideal material for buil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F251/00C08F220/56C08F222/38A61B5/024A61B5/107G01B7/16G01L1/18
CPCA61B5/024A61B5/1071C08F251/00C08F289/00G01B7/18G01L1/18C08F220/56C08F222/385
Inventor 祁海松余杰刘宏臣党超王明冯晓刘德桃
Owner SOUTH CHINA UNIV OF TECH
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