Preparation method for high-strength light-operated quick self-repairing hydrogel

A self-healing and hydrogel technology, applied in the direction of additive processing, can solve the problems of low mechanical strength of hydrogel, low strength of self-healing material, single repair medium, etc., and achieve good social and ecological benefits, and it is effective. , the effect of simplifying the preparation process

Inactive Publication Date: 2017-10-24
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although self-healing hydrogels have been developed accordingly, there are still many problems that limit their practical applications.
First of all, due to the low mechanical strength of the hydrogel itself, the prepared self-healing material has low strength and is easy to break during use.
Secondly, the repair medium is single and inconvenient to operate

Method used

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  • Preparation method for high-strength light-operated quick self-repairing hydrogel
  • Preparation method for high-strength light-operated quick self-repairing hydrogel
  • Preparation method for high-strength light-operated quick self-repairing hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of a high-intensity light-controlled rapid self-healing hydrogel with a graphene oxide content of 1wt.%:

[0024] Using N,N-dimethylacrylamide as monomer, XLS-type synthetic lithium magnesium silicate as crosslinking agent, potassium persulfate as initiator, N,N,N',N'-tetramethylethylenediamine as Catalyst, 2wt.% nano wood pulp cellulose as reinforcement phase. Add 1wt.% graphene oxide into distilled water under ice-water bath conditions, ultrasonically oscillate for half an hour and then stir for half an hour; then add nano-wood pulp cellulose and stir for half an hour; then add a crosslinking agent and stir for 1 hour; then add mono The body was stirred for 2 hours; finally, the initiator and catalyst were added in turn, and stirred for 5 minutes. The resulting solution is poured into the corresponding mould, see figure 1 . The reaction time is 24 hours at 25°C. The obtained sample microstructure presents a honeycomb-like structure, such as ...

Embodiment 2

[0025] Example 2: Preparation of high-intensity light-controlled fast self-healing hydrogels with graphene oxide content of 2wt.% and 3wt.%:

[0026] Using N,N-dimethylacrylamide as monomer, XLS-type synthetic lithium magnesium silicate as crosslinking agent, potassium persulfate as initiator, N,N,N',N'-tetramethylethylenediamine as Catalyst, 2wt.% nano wood pulp cellulose as reinforcement phase. Add 2wt.% graphene oxide into distilled water under ice-water bath conditions, ultrasonically oscillate for half an hour and then stir for half an hour; then add nano-wood pulp cellulose and stir for half an hour; then add a crosslinking agent and stir for 1 hour; then add mono The body was stirred for 2 hours; finally, the initiator and catalyst were added in turn, and stirred for 5 minutes. The resulting solution was poured into the corresponding moulds. The reaction time is 24 hours at 25°C. A 3wt.% high-intensity light-controlled fast self-healing hydrogel was prepared by the s...

Embodiment 3

[0027] Example 3: Carry out repair rate experiment on high-intensity light-controlled fast self-healing hydrogel:

[0028] The prepared high-intensity light-controlled rapid self-healing hydrogel with 1wt%-3wt.% graphene oxide content was subjected to self-healing experiments. The experimental process is to put together the fracture parts of the cut tensile samples and irradiate them sequentially under near-infrared light for 1 to 5 minutes. The sample under the corresponding irradiation time is subjected to a tensile test, and the repair rate value is obtained by dividing the corresponding stress value with the stress value in Example 2, such as Figure 4 shown. It can be seen from the repair rate value that as the graphene oxide content increases, the self-healing rate gradually increases, and as the repair time increases, the self-healing hydrogel with a graphene oxide content of 3wt.% reaches 92% repair in 5 minutes Rate.

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Abstract

The invention relates to a preparation method for a high-strength light-operated quick self-repairing hydrogel. A self-repairing hydrogel system has higher mechanical strength and a quick self-repairing function under near-infrared light irradiation. The self-repairing function is realized by the hydrogel which is formed by cross-linking N,N-dimethylacrylamide with XLS type compound laponite. After the hydrogel is broken, the broken parts are spliced and quick self-repairing can be realized under the control of near-infrared light. According to the invention, the adopted raw materials are conveniently acquired, the preparation is simple and the processing cost is low. The self-repairing synthetic method is stable, the self-repairing hydrogel can be repeatedly prepared in large volume and the mechanical strength is high. Under the control of the near-infrared light, 92% repairing rate is realized within 5 minutes. Different structure design can be realized by the hydrogel through the mold design, so as to adapt to the practical working condition. The self-repairing function approximate to the organism can be realized when the organism is damaged. The hydrogel has wide application prospect in the fields of medical surgery dressing, drug controllable release, flexible robot, and the like.

Description

technical field [0001] The invention relates to a preparation method of a high-intensity light-controlled rapid self-repair hydrogel. Background technique [0002] Polymer materials with self-repair function can prolong the service life of materials by self-repairing damaged parts, and have broad application prospects in the fields of medical surgical dressings, flexible robots or drive component repair. Since hydrogel is a functional material filled with water medium in a spatial network structure, by virtue of its characteristics similar to the structure and performance of organisms, hydrogel materials with self-healing functions have been widely used in medicine and health, tissue engineering , petrochemical and other fields. [0003] At present, the research on the preparation of fast self-healing hydrogels has made corresponding progress. The prepared self-healing hydrogel is realized through reversible hydrogen bonding, hydrophobic interaction and other principles. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/54C08F2/44C08K3/34C08K3/04C08L1/02B33Y70/00
CPCC08F120/54B33Y70/00C08F2/44C08K3/04C08K3/34C08L1/02
Inventor 李志杜思成梁云虹
Owner JILIN UNIV
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