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High-stretchability and self-repairing hydrogel and preparation method thereof

A technology of hydrogel and stretchability, which is applied in the field of new polymer functional materials, can solve the problems of low stretching ratio of hydrogel, complex self-repair conditions, long self-repair time, etc., and achieve fast preparation speed and molding speed Fast and easy results

Active Publication Date: 2019-12-06
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the technical deficiencies of low self-repairing hydrogel stretching ratio, complicated self-repairing conditions, long self-repairing time and low transparency in the prior art, and provide a kind of high stretchability, Hydrogel with rapid self-healing properties and high transparency at room temperature

Method used

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  • High-stretchability and self-repairing hydrogel and preparation method thereof
  • High-stretchability and self-repairing hydrogel and preparation method thereof
  • High-stretchability and self-repairing hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare the hydrogel as follows:

[0038] S1. Weigh 4.5 parts of monomer acrylamide, 1.5 parts of dimethylaminoethyl methacrylate, 0.01 part of aqueous crosslinking agent, 0.005 part of initiator, 20 to 30 parts of deionized water, preferably 24 parts; The agent ammonium persulfate, deionized water, monomer acrylamide, dimethylaminoethyl methacrylate and water-soluble crosslinking agent water-soluble hexamethylene diisocyanate trimer were added to the reaction vessel and mixed well;

[0039] S2. Ultrasonic treatment of the mixture in step S1 for 30-120s; preferably ultrasonic treatment for 60s

[0040] S3. The mixture in step S2 is allowed to stand at 80-90°C for 1-35 minutes, usually for 5 minutes, to form a hydrogel, and after cooling to 15-30°C, take out.

[0041] Wherein the preparation method of water-soluble crosslinking agent water-soluble hexamethylene diisocyanate trimer is as follows: weigh 6g of monohydroxy polyether (molecular weight 550) in a single-necked...

Embodiment 2

[0043] Prepare the hydrogel as follows:

[0044] S1. Weigh 4.8 parts of monomer acrylamide, 1.2 parts of dimethylaminoethyl methacrylate, 0.01 part of aqueous crosslinking agent, 0.005 part of initiator, 20 to 30 parts of deionized water, preferably 24 parts; The agent ammonium persulfate, deionized water, monomer acrylamide, dimethylaminoethyl methacrylate and water-soluble crosslinking agent water-soluble hexamethylene diisocyanate trimer were added to the reaction vessel and mixed well;

[0045] S2. Ultrasonic treatment of the mixture in step S1 for 30-120s; preferably ultrasonic treatment for 60s

[0046] S3. The mixture in step S2 is allowed to stand at 80-90°C for 1-35 minutes, usually for 5 minutes, to form a hydrogel, and after cooling to 15-30°C, take out.

[0047] Wherein the preparation method of water-soluble crosslinking agent water-soluble hexamethylene diisocyanate trimer is as follows: weigh 6g of monohydroxy polyether (molecular weight 550) in a single-necked...

Embodiment 3

[0049] Prepare the hydrogel as follows:

[0050]S1. Weigh 5 parts of monomer acrylamide, 1 part of dimethylaminoethyl methacrylate, 0.01 part of aqueous crosslinking agent, 0.005 part of initiator, 20 to 30 parts of deionized water, preferably 24 parts; The agent ammonium persulfate, deionized water, monomer acrylamide, dimethylaminoethyl methacrylate and water-soluble crosslinking agent water-soluble hexamethylene diisocyanate trimer were added to the reaction vessel and mixed well;

[0051] S2. Ultrasonic treatment of the mixture in step S1 for 30-120s; preferably ultrasonic treatment for 60s

[0052] S3. The mixture in step S2 is allowed to stand at 80-90°C for 1-35 minutes, usually for 5 minutes, to form a hydrogel, and after cooling to 15-30°C, take out.

[0053] Wherein the preparation method of the water-soluble crosslinking agent water-soluble hexamethylene diisocyanate trimer is as follows: weigh 6 g of monohydroxy polyether (molecular weight 550) in a single-necked ...

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Abstract

The invention discloses a hydrogel with characteristics of high stretchability and rapid self-repairing performance at a room temperature, wherein the hydrogel is prepared by carrying out free radicalpolymerization on the following raw materials by weight: 4.5-5 parts of a monomer acrylamide, 1-1.5 parts of dimethylaminoethyl methacrylate, 0.01-0.03 part of a water-based cross-linking agent, and0.001-0.01 part of an initiator in water, wherein the water-based cross-linking agent is a water-soluble hexamethylene diisocyanate tripolymer. According to the present invention, the prepared hydrogel can overcome the technical defects of low strength, poor environmental responsiveness and poor temperature resistance of the self-repairing hydrogel in the prior art, has the high stretching multiple of more than 15 times and the self-repairing rate of up to 90%, has advantages of simple preparation process, rapid molding and good light transmittance, and has wide application prospects in the fields of medicine and tissue engineering.

Description

technical field [0001] The invention belongs to the field of novel polymer functional materials, and more particularly relates to a self-healing hydrogel with high stretchability and a preparation method thereof. Background technique [0002] Self-healing is one of the most remarkable properties of biological materials such as skin, bone and wood. The special ability of natural materials to heal cracks often involves energy dissipation mechanisms that result from sacrificing bonds. Although synthetic hydrogels closely resemble biological tissues, they are often very brittle and lack self-healing ability, which hinders their application in stress-bearing applications. [0003] In recent years, extensive research has been carried out to improve the mechanical properties of hydrogels formed by free-radical cross-linking copolymerization. The poor mechanical properties of chemically crosslinked hydrogels mainly stem from their very low resistance to crack propagation. There i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F220/56C08F220/34C08L33/26C08L75/08C08G18/79C08G18/28A61L27/16A61L27/52A61L27/50
CPCC08J3/075C08F220/56C08G18/792C08G18/283A61L27/16A61L27/52A61L27/50C08J2333/26C08J2475/08A61L2430/06C08F220/34
Inventor 吴旭陈睿徐秀彬于丹凤彭思玉毛桃嫣李泽莹
Owner GUANGZHOU UNIVERSITY
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