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Flexible self-healing conductive hydrogel sensor and preparation method thereof

A conductive hydrogel and hydrogel technology, applied in the measurement of the property force of the piezoelectric resistance material, fluid pressure measurement by changing the ohmic resistance, etc., can solve the problems of complex preparation method, single function, high cost, etc. Achieve excellent sensing performance, satisfy service life, and good fatigue resistance

Inactive Publication Date: 2020-01-17
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a flexible self-healing conductive hydrogel sensor and its preparation method, which overcomes the defects of complex preparation methods, low efficiency, high cost and single function in the prior art, and realizes the simple and efficient preparation of high mechanical Hydrogel materials with strength and excellent repair properties

Method used

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  • Flexible self-healing conductive hydrogel sensor and preparation method thereof
  • Flexible self-healing conductive hydrogel sensor and preparation method thereof
  • Flexible self-healing conductive hydrogel sensor and preparation method thereof

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Embodiment 1

[0037] (1) Acrylamide monomer (8.3wt%, analytically pure Sinopharm Chemical Reagent Co., Ltd.), cross-linking agent N, N-methylenebisacrylamide (0.1wt%, analytically pure Sinopharm Chemical Reagent Co., Ltd.) Dissolve in deionized water, then blend with acetoacetylated polyvinyl alcohol aqueous solution (16.7wt% relative molecular weight about 90000g / mol, degree of substitution 10%), shake evenly, add initiator potassium persulfate (relative to acrylamide monomer 0.3% of the mass, analytically pure Sinopharm Group Chemical Reagent Co., Ltd.), triggering the polymerization of acrylamide monomers, the polymerization temperature is 25 ° C, and the polymerization time is 2 hours, and the flexible precursor hydrogel can be obtained.

[0038] (2) Soak the above-mentioned precursor hydrogel (5g) in an aqueous solution of ferric chloride (0.5M, 200mL, analytically pure Sinopharm Chemical Reagent Co., Ltd.), and soak for 0.5h to obtain a flexible self-healing conductive hydrogel glue. ...

Embodiment 2

[0040] (1) Dissolve acrylamide monomer (12.5wt%) and cross-linking agent N,N-methylenebisacrylamide (0.1wt%) in deionized water, and then mix with acetoacetated polyvinyl alcohol aqueous solution (12.5wt%) % relative molecular mass of about 90000g / mol, degree of substitution 10%) blending, shaking evenly, adding initiator potassium persulfate (0.3% relative to the mass of acrylamide monomer) to initiate the polymerization of acrylamide monomer, the polymerization temperature is 25°C, The polymerization time is 2h, and the flexible precursor hydrogel can be obtained.

[0041] (2) Soak the above precursor hydrogel (5 g) in ferric chloride aqueous solution (0.5 M, 200 mL) for 0.5 h to obtain a flexible self-healing conductive hydrogel.

Embodiment 3

[0043] (1) Dissolve acrylamide monomer (16.7wt%) and cross-linking agent N,N-methylenebisacrylamide (0.1wt%) in deionized water, and then mix with acetoacetated polyvinyl alcohol aqueous solution (8.3wt%) % relative molecular mass of about 90000g / mol, degree of substitution 10%) blending, shaking evenly, adding initiator potassium persulfate (0.3% relative to the mass of acrylamide monomer) to initiate the polymerization of acrylamide monomer, the polymerization temperature is 25°C, The polymerization time is 2h, and the flexible precursor hydrogel can be obtained.

[0044] (2) Soak the above precursor hydrogel (5 g) in ferric chloride aqueous solution (0.5 M, 200 mL) for 0.5 h to obtain a flexible self-healing conductive hydrogel.

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Abstract

The invention relates to a flexible self-healing conductive hydrogel sensor and a preparation method thereof. According to the preparation method, the flexible self-healing conductive hydrogel sensoris prepared through following steps: blending an acrylamide solution and an acetoacetated polyvinyl alcohol solution, initiating polymerization to obtain a flexible precursor hydrogel, and then soaking the flexible precursor hydrogel in a ferric trichloride solution to obtain a finished product. The prepared hydrogel has excellent sensing performance and can be successfully used for monitoring human motion or physiological signals, meanwhile, the hydrogel device has good fatigue durability and self-healing performance, and therefore the requirements of sensing devices on the service life and signal stability can be met.

Description

technical field [0001] The invention belongs to the field of functional hydrogel and its preparation, in particular to a flexible self-healing conductive hydrogel sensor and its preparation method. Background technique [0002] With the widespread popularity of smart terminals, wearable flexible electronic devices present a huge market prospect. As the core component of flexible electronic devices, flexible strain sensors have broad application prospects in human health monitoring, electronic skin, human-computer interaction systems, implantable devices, etc., and have become a key research direction in the field of intelligent hydrogel materials. Flexible conductive hydrogel has the characteristics of good conductivity, flexibility and biocompatibility, and its wide application in the fields of biomedicine, soft robots and artificial organs has attracted more and more attention. However, conductive hydrogels currently have constraints such as high mechanical properties and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08L33/26C08K3/16C08F220/56C08F222/38G01L1/18G01L9/06
CPCC08F220/56C08J3/075C08J2329/04C08J2333/26C08J2429/04C08J2433/26C08K3/16G01L1/18G01L9/06C08F222/385
Inventor 徐红铁建飞毛志平隋晓锋冯雪凌王碧佳张琳萍钟毅
Owner DONGHUA UNIV
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