Alkali-soluble chitosan-polyacrylamide-polyaniline conductive hydrogel material with adjustable conductive polymer network structure

A technology of conductive polymer and polyacrylamide, which is applied in the field of alkali-soluble chitosan-polyacrylamide-polyaniline conductive hydrogel and its preparation, can solve the problems of being difficult to obtain at the same time, and achieve excellent biocompatibility, The effect of improving mechanical properties and increasing tensile strength

Active Publication Date: 2020-04-14
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of alkali-soluble chitosan-polyacrylamide-polyacrylamide with adjustable conductive polymer network structure to solve the problem that the existing conductive hydrogel materials are difficult to obtain excellent mechanical properties and conductive properties at the same time. Aniline Composite Conductive Hydrogel Materials

Method used

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  • Alkali-soluble chitosan-polyacrylamide-polyaniline conductive hydrogel material with adjustable conductive polymer network structure
  • Alkali-soluble chitosan-polyacrylamide-polyaniline conductive hydrogel material with adjustable conductive polymer network structure
  • Alkali-soluble chitosan-polyacrylamide-polyaniline conductive hydrogel material with adjustable conductive polymer network structure

Examples

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example 1

[0025] 1) take each component according to mass percentage: chitosan 4%, lithium hydroxide monohydrate 8%, urea 6%, graphene oxide 0.1%, all the other are water; Described chitosan molecular weight is 2000000; After the above components are mixed and swollen, it is prepared through multiple freezing-thawing processes;

[0026] 2) Take 20g of the above-mentioned graphene oxide-chitosan solution, add 2.4g of acrylamide, 0.05g of N,N'-methylene bisacrylamide and 0.03g of ammonium persulfate in sequence, stir evenly, centrifugally defoam, and cast in In the mold, transfer it to a 60°C oven for 4 hours and take it out, dialyze and dehydrate to obtain an alkali-soluble chitosan-polyacrylamide gel;

[0027] 3) Transfer the alkali-soluble chitosan-polyacrylamide gel prepared in the above step 2) to a mass fraction of 3% aniline-1mol / L hydrochloric acid solution for 2 hours, then drop the mass fraction of 1.5% persulfuric acid The ammonium initiator solution was polymerized for 6 hour...

example 2

[0030] 1) take each component according to mass percentage: chitosan 4%, lithium hydroxide monohydrate 8%, urea 6%, graphene oxide 0.1%, all the other are water; Described chitosan molecular weight is 2000000; After the above components are mixed and swollen, it is prepared through multiple freezing-thawing processes;

[0031] 2) Take 20g of the above-mentioned graphene oxide-chitosan solution, add 2.4g of acrylamide, 0.05g of N,N'-methylene bisacrylamide and 0.03g of ammonium persulfate in sequence, stir evenly, centrifugally defoam, and cast in In the mold, transfer it to a 60°C oven for 4 hours and take it out, dialyze and dehydrate to obtain an alkali-soluble chitosan-polyacrylamide gel;

[0032] 3) Transfer the alkali-soluble chitosan-polyacrylamide gel prepared in the above step 2) to a mass fraction of 3% aniline-3% phytic acid-1mol / L hydrochloric acid solution for 2 hours, then drop the mass fraction It is a 1.5% ammonium persulfate initiator solution, and is polymeri...

example 3

[0035] 1) take each component according to mass percentage: chitosan 4%, lithium hydroxide monohydrate 8%, urea 6%, graphene oxide 0.1%, all the other are water; Described chitosan molecular weight is 2000000; After the above components are mixed and swollen, it is prepared through multiple freezing-thawing processes;

[0036] 2) Take 20g of the above-mentioned graphene oxide-chitosan solution, add 2.4g of acrylamide, 0.05g of N,N'-methylene bisacrylamide and 0.03g of ammonium persulfate in sequence, stir evenly, centrifugally defoam, and cast in In the mold, transfer it to a 60°C oven for 4 hours and take it out, dialyze and dehydrate to obtain an alkali-soluble chitosan-polyacrylamide gel;

[0037]3) Transfer the alkali-soluble chitosan-polyacrylamide gel prepared in the above step 2) to a mass fraction of 3% aniline-7% phytic acid-1mol / L hydrochloric acid solution for 2 hours, then drop the mass fraction It is a 1.5% ammonium persulfate initiator solution, and is polymeriz...

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Abstract

The invention discloses an alkali-soluble chitosan-polyacrylamide-polyaniline composite conductive hydrogel material with an adjustable conductive polymer network structure. A preparation method comprises the following steps: dissolving chitosan powder in a mixed aqueous solution of lithium hydroxide monohydrate, urea and graphene oxide to obtain a graphene oxide / alkali-soluble chitosan solution;then adding acrylamide, N, N '-methylene bisacrylamide and ammonium persulfate sequentially to obtain an alkali-soluble chitosan-polyacrylamide gel through in-situ polymerization; after dialysis and dehydration, transferring an obtained product into an aniline-phytic acid / hydrochloric acid solution for soaking, and dropwise adding an ammonium persulfate solution to initiate aniline polymerization,so as to obtain the alkali-soluble chitosan-polyacrylamide-polyaniline composite conductive hydrogel material. The polyaniline conductive polymer network structure can be adjusted by changing the ratio of phytic acid to hydrochloric acid, so that the conductivity and the mechanical property of the hydrogel are adjusted. The material is expected to be applied to the fields of electronic skin, electronic devices and the like by virtue of excellent mechanical properties and conductivity.

Description

technical field [0001] The invention belongs to the field of conductive hydrogel preparation, in particular to an alkali-soluble chitosan-polyacrylamide-polyaniline conductive hydrogel with adjustable conductive polymer network structure and a preparation method thereof. Background technique [0002] High-strength conductive hydrogels with stretchability have attracted extensive attention due to their great application potential in flexible electronic devices, biosensors, etc. Polyaniline has special electrical and optical properties. After doping, it can have electrical conductivity and electrochemical properties. Because of its easy-to-obtain raw materials, simple synthesis process, and good chemical and environmental stability, it is often used as a conductive hydrogel. The conductive component of the glue. However, while the rigid conjugated chain of polyaniline brings excellent conductivity to it, it also brings defects in processing, film formation and mechanics, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L5/08C08L33/26C08L79/02C08K3/04C08K5/521C08G73/02C08F220/56C08F222/38
CPCC08F220/56C08G73/0266C08J3/075C08J3/246C08J2305/08C08J2433/26C08J2479/02C08K5/521C08K3/042C08F222/385
Inventor 王征科金晓强姜慧虹傅倍佳鲍晓炯胡巧玲
Owner ZHEJIANG UNIV
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