Preparation method of strain-response conductivehydrogel

A conductive hydrogel and reaction technology, which is applied in the preparation of strain-responsive conductive hydrogel and the preparation of strain-responsive conductive hydrogel synthesized by microwave-assisted heating cooperative assembly, can solve the problems of hydrogel mechanical strength, ductility and toughness , unsatisfactory recoverability and other issues, to achieve good strain response conductivity, reduce production costs, and high fatigue strength

Active Publication Date: 2017-06-27
乌鲁木齐诺西辰环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength, ductility, toughness, and recoverability of hydrogels are still unsatisfactory, which will restrict their applications in biomimetic biology, flexible electronic devices, biosensors, etc.

Method used

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  • Preparation method of strain-response conductivehydrogel
  • Preparation method of strain-response conductivehydrogel
  • Preparation method of strain-response conductivehydrogel

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] In the preparation method according to the present invention, the homogeneous network formed by polymer PVA and PVP is used as the matrix phase, and Fe 3+ The "core-skin" structure network formed by coordination with CNC is used as the conductive phase of the hydrogel. First, PVA and PVP are prepared into a solution, then the PVA solution and the PVP solution are mixed in a certain ratio, and then a certain amount of CNC and Fe 3+ , React under microwave-assisted heating conditions, and finally add sulfuric acid dropwise to the reaction solution, stir quickly with a glass rod, and cool to room temperature to obtain a stable hydrogel. This process does not require any complicated experimental equipment and does not add any crosslinking agent , Organic solvents, initiators, and UV-induced conditions, the components are assembled together to form a uniform network structure to give the hydrogel high mechanical strength and high fatigue strength, and it also has strain-respons...

Embodiment 1

[0054] 1) Add 10g of PVA particles (PVA17-88, molecular weight of 170,200,000, alcoholysis of about 88%, Sinopharm Chemical Reagent Co., Ltd.) into 115mL of deionized water, stir magnetically, and heat at 80℃ for 15min , To obtain a PVA solution with a concentration of 8% by mass of polyvinyl alcohol;

[0055] 2) Add 5g of PVP powder (PVP powder K-30, molecular weight 10,000-70,000, Xilong Chemical Co., Ltd.) into 20mL of deionized water and disperse for 15min under ultrasonic conditions to prepare the mass percentage concentration of polyvinylpyrrolidone in the solution 20% PVP solution;

[0056] 3) Preparation of reaction matrix solution

[0057] The polyvinyl alcohol solution obtained in step 1) and the polyvinylpyrrolidone solution obtained in step 2) are mixed and stirred in a volume ratio of 7:3 to obtain a 100 mL solution;

[0058] 4) Preparation of reaction solution

[0059] Preparation of nano cellulose: Take 50 mL of the prepared mass percentage concentration of 58% sulfuric...

experiment Embodiment 1

[0089] Experimental Example 1: Mechanical performance experiment

[0090] A mechanical testing machine (UTM6530) was used to study the mechanical properties of the strain response conductive hydrogel. The sample size used in the tensile test is: 5×2×0.5cm 3 The tensile loading rate is 60mm / min. Such as Figure 5 , 6 As shown, Fe in the hydrogel prepared according to Example 1 3+ The "core-skin" structure formed with nanocellulose can enhance the mechanical properties of the hydrogel. The strain-responsive conductive hydrogel can reach 820% elongation under a tensile stress of 6.2MPa. Under the condition of 80%, the recovery rate of 10 cycles is still maintained at 97.6%, showing super fatigue resistance.

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Abstract

The invention discloses a method for preparing strain-response conductivehydrogelbased on microwave assisting. The method uses polyvinyl alcohol and polyvinylpyrrolidone as base materials, Fe<3+>is added, a uniform polymer network can be formed through microwave-assisted heating and self-assembly, and the obtained hydrogel has good strain-response conductive properties and can also keep high fatigue resistance strength while having high mechanical strength. In addition, according to a preparation method of the strain-response conductivehydrogel, the operation is simple, the raw materials are wide in source and cheap, the production cost of the product is reduced, and the hydrogel is suitable for large-scale industrial production.

Description

Technical field [0001] The invention belongs to the field of material synthesis. Specifically, it relates to a method for preparing a strain-responsive conductive hydrogel. The hydrogel prepared by the method not only has a high stretch rate and fatigue resistance but also has strain-responsive conductivity characteristics, and particularly relates to A preparation method for synthesizing strain-responsive conductive hydrogel with microwave-assisted heating and cooperative assembly. Background technique [0002] Stimulus response polymer soft materials, as a new type of material that can intelligently respond to changes in the external environment, have high application prospects in the fields of biomimetic biology, flexible electronic devices, biosensors, etc., so they have attracted more and more attention. Although currently, some hydrogel products have the ability to respond to changes in external stimuli, for example, the hydrogel prepared by a reversible sol-gel transition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08J3/075C08L29/04C08L39/06C08L1/04C08K3/16
CPCC08J3/075C08J3/28C08J2329/04C08J2439/06C08L39/06C08L2205/03C08L29/04C08L1/04C08K3/16
Inventor 刘艳军刘田甜
Owner 乌鲁木齐诺西辰环境工程有限公司
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