Production methods of conductive self-healing hydrogel and conductive self-healing circuit

A technology for healing hydrogels and hydrogels, applied in inks, household appliances, applications, etc., can solve the problems of affecting self-healing performance, increasing mechanical properties, complex manufacturing processes, etc., achieving high self-healing performance, offsetting small damage, Good electrical conductivity

Active Publication Date: 2018-09-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the introduction of the second cross-linking method in the hydrogel system, the mechanical properties increased, but its self-healing properties were affected
[0007] Patent CN 103137765 A uses polypyrrole to prepare a bioconductive hydrogel. In this patent, chitosan is used to prepare hydrog

Method used

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  • Production methods of conductive self-healing hydrogel and conductive self-healing circuit
  • Production methods of conductive self-healing hydrogel and conductive self-healing circuit
  • Production methods of conductive self-healing hydrogel and conductive self-healing circuit

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0061] Example 1:

[0062] (1) Preparation of conductive self-healing hydrogel precursor with polypyrrole as the conductive system

[0063] A: Dissolve 5g of gelatin in 125ml of water, add 14g of ethylenediamine and adjust the pH to about 5 with hydrochloric acid, then add 2.675g of carbodiimide, and then use deionized water to make the volume to 250ml for reaction, about 1h After that, it was put into a dialysis bag for dialysis, and the water was changed every day. After about 3 days, it was lyophilized to obtain aminated gelatin.

[0064] B: Put 5g of sodium alginate in 25ml of ethanol to prepare a uniform suspension, put it for later use, take 2.67g of sodium periodate and dissolve it in deionized water in the dark, mix and stir with the above suspension, and react for 4h in the dark Then add ethylene glycol to stop the reaction for about 15 minutes, put it into a dialysis bag, change the water every day, and take out and freeze-dry about 3 days later to obtain oxidized sodium a...

Example Embodiment

[0071] Example 2

[0072] (1) Preparation of conductive self-healing hydrogel precursor with polypyrrole as the conductive system

[0073] A: Dissolve 5g of gelatin in 125m water, add 14g of ethylenediamine, adjust the pH to about 5 with hydrochloric acid, then add 2.675g of carbodiimide and dilute the volume to 250ml with deionized water for reaction, about 1h later , Put it into a dialysis bag for dialysis, change the water every day, about 3 days later, lyophilize it to obtain aminated gelatin.

[0074] B: Put 5g of sodium alginate in 25ml of ethanol to prepare a uniform suspension, put it for later use, take 2.67g of sodium periodate and dissolve it in deionized water in the dark, mix and stir with the above suspension, and react for 4h in the dark Then add ethylene glycol to stop the reaction for about 15 minutes, put it into a dialysis bag and change the water every day, take it out and freeze-dry after about 3 days to obtain oxidized sodium alginate.

[0075] Configure solutio...

Example Embodiment

[0080] Example 3

[0081] (1) Preparation of conductive self-healing hydrogel precursor with polypyrrole as the conductive system

[0082] A: Dissolve 5g of gelatin in 125m water, add 14g of ethylenediamine, adjust the pH to about 5 with hydrochloric acid, then add 2.675g of carbodiimide and dilute the volume to 250ml with deionized water for reaction, about 1h later After putting it into a dialysis bag for dialysis and changing the water for about 3 days every day, it is lyophilized to obtain aminated gelatin.

[0083] B: Put 5g of sodium alginate in 25ml of ethanol to prepare a uniform suspension, put it for later use, take 2.67g of sodium periodate and dissolve it in deionized water in the dark, mix and stir with the above suspension, and react for 4h in the dark Then add ethylene glycol to stop the reaction for about 15 minutes, put it into a dialysis bag and change the water every day, take it out and freeze-dry after about 3 days to obtain oxidized sodium alginate.

[0084] Con...

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Abstract

The invention provides a living body surface or inside applicable conductive self-healing hydrogel and a production method thereof. The production method of the conductive self-healing hydrogel comprises the steps of preparing aminated gelatin and oxidized sodium alginate, preparing a pyrrole-free self-healing hydrogel from the aminated gelatin and the oxidized sodium alginate, and further addingin pyrrole to prepare the conductive self-healing hydrogel. The applied materials are all biocompatible, and through inter-macromolecule reversible Schiff base structures, can achieve high self-healing performance without external stimuli and offset minor injuries produced during application of a flexible circuit; meanwhile, when patterned in different manners, the conductive self-healing hydrogelcan be applied to fields such as bio-electrodes, sensors and circuits.

Description

Technical field: [0001] The invention belongs to the technical field of functional polymer materials and is based on a self-healing hydrogel with biological affinity. The circuit conducts electricity through conductive polymers and ions in the hydrogel and can achieve self-healing. The mechanical properties of the hydrogel can be effectively improved by performing cross-linking polymerization at low temperature, and can be carried out by screen printing, 3D printing, etc. processing. This kind of circuit has a wide range of applications in biosensors, biomedicine, electronic tattoos, etc. Background technique: [0002] Hydrogel is a cross-linked polymer system that can swell significantly in water without dissolving. Since its internal polymer contains hydrophilic groups that can form hydrogen bonds with water molecules, it can achieve water retention. The hydrogel contains water inside, which is conductive but has low conductivity. Conductive hydrogel is to add a conduct...

Claims

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Application Information

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IPC IPC(8): C08L5/04C08L89/06C08L79/04C08J3/075C09D11/04C09D11/14C09D11/30
CPCC08J3/075C08J2305/04C08J2479/04C08J2489/06C09D11/04C09D11/14C09D11/30
Inventor 魏杰任凯
Owner BEIJING UNIV OF CHEM TECH
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