Preparation method of high-strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel

A composite hydrogel and polyvinyl alcohol technology, which is applied in the field of preparation of high-strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel, can solve the problems of high brittleness and poor mechanical properties of the hydrogel, and achieve The effect of convenient operation

Inactive Publication Date: 2019-08-09
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypyrrole-graphene oxide hydrogels are brittle and have poor mechanical properties, so it is necessary to develop a simple and environmentally friendly method to prepare high-strength conductive composite hydrogels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation of high strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel, concrete steps are as follows:

[0023] 1) Add 1.5g of polyvinyl alcohol with a degree of alcoholysis of 99% to 20mL of deionized water, heat at 95°C and stir to dissolve to obtain an aqueous solution of polyvinyl alcohol, and naturally cool down to room temperature to obtain a uniform and transparent aqueous solution of polyvinyl alcohol. stir;

[0024] 2) Add 20mL (concentration: 2mg / mL) graphene oxide aqueous solution into the polyvinyl alcohol aqueous solution (keep stirring) obtained in step 1) in an ice bath at 4°C, mix, then slowly add 180μL pyrrole monomer, continue Stir, then add 4mL (concentration: 0.06g / mL) ammonium persulfate solution dropwise, and stir for 1h to obtain a polyvinyl alcohol-graphene oxide-polypyrrole prepolymer;

[0025] 3) Pour the polyvinyl alcohol-graphene oxide-polypyrrole prepolymer obtained in step 2) into a 25mL beaker, freeze at -4...

Embodiment 2

[0030] A kind of preparation of high strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel, concrete steps are as follows:

[0031] 1) Add 1.0 g of polyvinyl alcohol with a degree of alcoholysis of 88% to 20 mL of deionized water, heat at 95° C. and stir to dissolve to obtain an aqueous solution of polyvinyl alcohol, and naturally cool down to room temperature to obtain a uniform and transparent aqueous solution of polyvinyl alcohol. stir;

[0032] 2) Add 5 mL (concentration: 4 mg / mL) graphene oxide aqueous solution into the polyvinyl alcohol aqueous solution (keep stirring) obtained in step 1) in an ice bath at 5°C, mix, then slowly add 120 μL pyrrole monomer, continue Stir, then add 7mL (concentration: 0.05g / mL) ammonium persulfate solution dropwise, and stir for 0.5h to obtain polyvinyl alcohol-graphene oxide-polypyrrole prepolymer;

[0033] 3) Pour the polyvinyl alcohol-graphene oxide-polypyrrole prepolymer obtained in step 2) into a 25mL beaker, freeze...

Embodiment 3

[0037] A kind of preparation of high strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel, concrete steps are as follows:

[0038] 1) Add 1.0 g of polyvinyl alcohol with a degree of alcoholysis of 85% to 10 mL of deionized water, heat at 95° C. and stir to dissolve to obtain an aqueous solution of polyvinyl alcohol, and naturally cool down to room temperature to obtain a uniform and transparent aqueous solution of polyvinyl alcohol. stir;

[0039] 2) Add 9mL (concentration: 3mg / mL) graphene oxide aqueous solution into the polyvinyl alcohol aqueous solution (keep stirring) obtained in step 1) in an ice bath at 3°C, mix, then slowly add 120μL pyrrole monomer, continue Stir, then add 10mL (concentration: 0.03g / mL) ammonium persulfate solution dropwise, and stir for 1.5h to obtain polyvinyl alcohol-graphene oxide-polypyrrole prepolymer;

[0040] 3) Pour the polyvinyl alcohol-graphene oxide-polypyrrole prepolymer obtained in step 2) into a 25mL beaker, freeze a...

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PUM

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Abstract

The invention discloses a preparation method of high-strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel. The preparation method comprises the following specific steps that firstly, polyvinyl alcohol is added into deionized water, heated at 90-100 DEG C and stirred to be dissolved, and a polyvinyl alcohol aqueous solution is obtained and naturally cooled to room temperature; then, the aqueous solution is kept stirring, a graphene oxide aqueous solution is added at 0-5 DEG C, then polypyrrole monomers are slowly added, an ammonium persulfate solution is added dropwise, andstirring continues; the mixture is poured into a mold, taken out after being frozen, and placed at room temperature for unfreezing, wherein freezing and unfreezing are repeated 4-7 times; finally, thehigh-strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel is obtained. The high-strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel has excellent mechanical strength, the preparation method of the high-strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel is simple, complex equipment is not needed, an organic solvent is not needed, and no pollution is caused to the environment.

Description

technical field [0001] The invention relates to a preparation method of high-strength polyvinyl alcohol-graphene oxide-polypyrrole composite hydrogel, belonging to the field of polymer functional materials. Background technique [0002] Conductive hydrogels are polymer composites composed of conductive components containing a highly hydrated polymer network. Conductive hydrogels are promising candidates in the field of biomedicine. Because they exhibit similar properties to soft tissue, such as flexibility, extensibility, and high water content. Conductive hydrogels have a wide range of applications, such as artificial muscles, cartilage, electronic skin, and biosensors. [0003] Polyvinyl alcohol is a water-soluble polymer obtained by alkali-catalyzed alcoholysis after the polymerization of vinyl acetate. Because of its low toxicity and non-irritating effect, it has been used in the pharmaceutical and food industries in my country. The molecular chain of polyvinyl alcoho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08L79/04C08K3/04C08G73/06
CPCC08J3/075C08G73/0611C08J2329/04C08J2479/04C08K3/042
Inventor 魏端丽李亮张桥穆海梅喻湘华
Owner WUHAN INSTITUTE OF TECHNOLOGY
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