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Method for preparing underwater self-healing hydrogel

A hydrogel and self-healing technology, which is applied in the field of preparation of underwater self-healing hydrogels, can solve the problems that hydrogels cannot achieve underwater self-healing, and hydrogels cannot self-heal underwater. , to prolong the service life

Inactive Publication Date: 2017-12-08
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that traditional hydrogels cannot achieve underwater self-healing, the purpose of this invention is to introduce the base pairs contained in the organism into the polymethacrylamide hydrogel polymer system, relying on the hydrogen between the base pairs The cross-linking of the hydrogel network is realized, and the base pair provides a self-healing mechanism, which solves the problem that the traditional hydrogel cannot self-heal underwater, and provides the next generation of underwater self-healing hydrogel The design provides new ideas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Modification of bases

[0016] a. Dissolve 0.01mol (1.35g) adenine in 20mL DMF to prepare an adenine solution with a molar concentration of 0.5mol / L; dissolve 0.01mol (1.2g) thymine in 20mL DMF to prepare a molar concentration of 0.5 mol / L thymine solution; then add 1.4 mol triethylamine to each of the above solutions, put it in an ice bath and stir for 30 minutes, then add 0.011 mol acryloyl chloride, and stir at room temperature for 6 hours under the protection of nitrogen. The solutions of modified adenine base monomers and thymine base monomers are respectively obtained; the molar ratios of adenine and thymine to acryloyl chloride and triethylamine are both 1:1.1:1.4;

[0017] b. Precipitate the modified adenine base monomer and thymine base monomer in the solution obtained in step (a) with 140mL ether solvent respectively, the ratio of ether solvent to the volume of the settled solution is 7:1, and then Carry out suction filtration with Buchner funnel, respect...

Embodiment 2

[0022] (1) Modification of bases

[0023] a. Dissolve 0.01mol (1.35g) adenine in 20mL dimethylformamide (DMF) to prepare an adenine solution with a molar concentration of 0.5mol / L; dissolve 0.01mol (1.2g) thymine in 20mL DMF 1.4mol (1.94mL) triethylamine was added to each of the above solutions respectively, and after stirring for 30min in an ice bath, 0.011mol (0.9mL) was added ) acryloyl chloride, under the protection of nitrogen, stirred and reacted at room temperature for 7 hours to obtain solutions of modified adenine base monomers and thymine base monomers respectively; used adenine and thymine with acryloyl chloride and triethylamine The molar ratio is 1:1.1:1.4;

[0024] b. Precipitate the modified adenine base monomer and thymine base monomer in the solution obtained in step (a) with 160mL ether solvent respectively, the ratio of ether solvent to the volume of the settled solution is 8:1, and then Carry out suction filtration with Buchner funnel, respectively obtain...

Embodiment 3

[0029] (1) Modification of bases

[0030] a. Dissolve 0.01mol (1.35g) adenine in 20mL dimethylformamide (DMF) to prepare an adenine solution with a molar concentration of 0.5mol / L; dissolve 0.01mol (1.2g) thymine in 20mL DMF 0.5 mol / L thymine solution; then add 0.015 mol triethylamine to each of the above solutions, stir in an ice bath for 30 minutes, add 0.012 mol acryloyl chloride, under nitrogen protection , and stirred at room temperature for 8 hours to obtain solutions of modified adenine base monomers and thymine base monomers, respectively. The molar ratio of adenine and thymine to acryloyl chloride and triethylamine was both 1:1.2:1.5;

[0031] b. Precipitate the modified adenine base monomer and thymine base monomer in the solution obtained in step (a) with 180mL ether solvent respectively, the ratio of ether solvent to the volume of the settled solution is 9:1, and then Carry out suction filtration with Buchner funnel, respectively obtain the adenine base monomer and...

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Abstract

The invention discloses a method for preparing underwater self-healing hydrogel. The method comprises the following steps: respectively modifying adenine and thymine so as to obtain a base monomer bound with double bonds; taking water as a solvent, performing thermal initiation with a hydrophilic monomer methacrylamide by virtue of an initiator potassium persulfate, and performing free radical polymerization to form a high polymer of a three-dimensional meshed structure, thereby obtaining the self-healing hydrogel from the polymer by virtue of complementary pairing hydrogen-bond interaction of DNA base-pairs. According to the method disclosed by the invention, the hydrogel has excellent self-healing property in air and under the water by virtue of the hydrogen-bond interaction among the bases. The problem that the traditional hydrogel cannot be self-healed under the water is solved, and the service life of the hydrogel in water and in a wet environment is prolonged. The design thought in the invention provides a novel thought for development of the underwater self-healing hydrogel in future.

Description

technical field [0001] The invention belongs to the technical field of polymer hydrogel, and relates to a preparation method of underwater self-healing hydrogel. Background technique [0002] The concept of self-healing originates from the self-healing ability in biology. The material that constitutes an organism is a functional system that is gradually optimized along with biological evolution. One of its most prominent characteristics is that it is damaged by the outside world. Afterwards, it has self-healing ability and regenerative function. Scientists have been working on materials with self-healing ability for many applications in life. For example: polymers, ceramics, cement and metals, etc. However, there is a significant gap between these materials and human soft tissues due to their softness, mechanical properties, water content, friction coefficient and other parameters. Strictly speaking, they do not have the advantage of replacing biological soft tissues. In ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/60
CPCC08F220/56C08F220/60
Inventor 高光辉刘鑫张钦陈佳楠
Owner CHANGCHUN UNIV OF TECH
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