Acylhydrazone bond-based self-repairing polymer hydrogel and preparation method thereof

A polymer and self-healing technology, which is applied in the field of self-repairing polymer hydrogels based on acylhydrazone bonds and their preparation, can solve the problems of difficult grafting of reversible acylhydrazone bonds, cumbersome grafting steps, and low product yield, etc. Good biocompatibility, high self-healing efficiency, good mechanical properties

Active Publication Date: 2021-06-11
侯峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane is often used in self-healing materials because of its excellent mechanical properties and good biocompatibility, but it is difficult to directly graft reversible acylhydrazone bonds to polyurethane, or the grafting steps are cumbersome and the cost is too high. Product yield is low

Method used

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  • Acylhydrazone bond-based self-repairing polymer hydrogel and preparation method thereof
  • Acylhydrazone bond-based self-repairing polymer hydrogel and preparation method thereof
  • Acylhydrazone bond-based self-repairing polymer hydrogel and preparation method thereof

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preparation example Construction

[0021] In one embodiment of the present invention, a kind of preparation method of self-healing polymer hydrogel based on acylhydrazone bond is provided, and the method steps are as follows:

[0022] Dissolving polyethylene glycol, aldehyde-containing double-terminal dihydroxy compound and catalyst in a solvent, stirring evenly, adding diisocyanate, and reacting to obtain a side chain aldehyde-containing polymer (BA-PU) solution;

[0023] After the BA-PU solution was cooled down, a DMF solution of triazine trihydrazide was added, stirred evenly, and left to stand at room temperature for reaction to obtain a self-healing polymer gel (AH-PU) based on an acylhydrazone bond; the prepared AH-PU Soak in deionized water and change the water regularly to obtain a self-healing polymer hydrogel (AH-WPU) based on acylhydrazone bonds;

[0024] Preferably, the BA-PU solution is cooled to 0-5°C;

[0025] Preferably, after stirring evenly, the step of degassing under reduced pressure is als...

Embodiment 1

[0055] Dissolve 50g of polyethylene glycol (10000g / mol), 0.45g of 2,3-dihydroxypropanal and 0.1g of stannous octoate in 30mL of DMF, stir well, add 2.22g of isophorone diisocyanate, and heat up under mechanical stirring React at 85° C. for 3 hours to obtain a branched chain aldehyde-based polymer (BA-PU) solution with a mass concentration of 65%.

[0056] Cool the BA-PU solution to 2°C, add 30mL of DMF solution in which 2.42g of triazine trihydrazide was dissolved, stir evenly, remove the gas under reduced pressure, then slowly pour it into the mold, and let it stand at room temperature for 4 h, Obtained self-healing polymer gel (AH-PU) based on acylhydrazone bonds. AH-PU was soaked in deionized water for 6 days, and the water was changed every 12 hours to obtain the self-healing polymer hydrogel AH-WPU-1 based on acylhydrazone bond.

Embodiment 2

[0058] Dissolve 80g polyethylene glycol (16000g / mol), 0.76g 2,4-dihydroxybenzaldehyde and 0.09g dibutyltin dilaurate in 30mL DMF, stir evenly, add 2.33g isophorone diisocyanate, mechanically stir , the temperature was raised to 85° C. for 3 h to obtain a polymer (BA-PU) solution with a mass concentration of 75% branched chain aldehyde group.

[0059] Cool the BA-PU solution to 3°C, add 30mL DMF solution in which 2.66g of triazine trihydrazide was dissolved, stir evenly, remove the gas under reduced pressure, then slowly pour it into the mold, and let it stand for 4 hours at room temperature. A self-healing polymer gel (AH-PU) based on acylhydrazone bonds was obtained. AH-PU was soaked in deionized water for 9 days, and the water was changed every 12 hours to obtain the self-healing polymer hydrogel AH-WPU-2 based on acylhydrazone bonds.

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Abstract

The invention belongs to the technical field of high polymer material preparation, and particularly relates to an acylhydrazone bond-based self-repairing polymer and a preparation method thereof. The preparation method comprises the following steps: dissolving polyethylene glycol, an aldehyde group-containing compound having double end dihydroxy groups and a catalyst into a solvent, uniformly stirring, adding diisocyanate, and reacting to obtain a polymer solution with a side chain containing an aldehyde group; adding a DMF solution of triazine trihydrazide, uniformly stirring, and standing for reaction at room temperature to obtain acylhydrazone bond-based self-repairing polymer gel; and soaking the prepared acylhydrazone bond-based self-repairing polymer gel in deionized water, and regularly changing water to obtain the acylhydrazone bond-based self-repairing polymer hydrogel. The self-repairing polymer disclosed by the invention can realize rapid self-healing of damaged parts at normal temperature under aniline or acidic conditions, and has good mechanical properties, and a product after 7-hour self-repairing can still keep good mechanical properties; and the hydrogel has good biocompatibility and does not cause harm to organisms.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to an acylhydrazone bond-based self-healing polymer hydrogel and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the development of electronic technology, the application of polymer materials in people's real life production has become more and more extensive and comprehensive. At this time, people put forward various new ideas for wearable electronic devices. However, due to problems such as the use environment and time, the surface of the material will inevitably be scratched and damaged during use, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08G18/83C08G18/66C08G18/48C08G18/32C08L75/08
CPCC08J3/075C08G18/833C08G18/6674C08G18/4833C08G18/3206C08G18/3215C08G2210/00C08J2375/08
Inventor 侯昭升刘正琦滕金伟徐钧郝甜甜邹超
Owner 侯峰
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