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Preparation method of light-heat sensitive quick response plural gel

A fast-response, composite gel technology, applied in the field of hydrogel preparation, can solve the problems of poor mechanical properties of gel, slow response speed, limited application of light-responsive gel, etc. Effect

Inactive Publication Date: 2016-06-08
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since photoresponsive monomers are generally oil-soluble, it is difficult to prepare hydrogel monomers, so photoresponsive hydrogels are still very rare.
At the same time, since photoresponsive gels are usually synthesized with organic crosslinking agents, the mechanical properties of the gels are poor and the response speed is slow, which limit the application of photoresponsive gels.

Method used

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  • Preparation method of light-heat sensitive quick response plural gel
  • Preparation method of light-heat sensitive quick response plural gel
  • Preparation method of light-heat sensitive quick response plural gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a light- and heat-sensitive fast-response composite gel, the process of which is as follows:

[0042] (1) Co-dissolve the photosensitive monomer, N-vinylpyrrolidone, POSS cross-linking agent OvPOSS, and organic cross-linking agent BIS in tetrahydrofuran and place in a container. Stir in a water bath at 50°C for 30 minutes under nitrogen protection until uniform Transparent, after rising to 60°C and adding initiator AIBN, stirring for 10 minutes, sealing, reacting at 60°C for 24 hours, taking out the gel, and repeatedly washing with tetrahydrofuran and water to remove unreacted monomers, to obtain The first network gel A;

[0043] Wherein, the quality of the photosensitive monomer is 6.5% of the quality of tetrahydrofuran, the quality of N-vinylpyrrolidone is 5.3% of the quality of tetrahydrofuran, and the quality of the POSS crosslinking agent OvPOSS is 12.6% of the sum of the quality of the photosensitive monomer and N-vinylpyrrolidone, The qual...

Embodiment 2

[0052] A method for preparing a light- and heat-sensitive fast-response composite gel, the process of which is as follows:

[0053] (1) Co-dissolve the photosensitive monomer, N-vinylpyrrolidone, POSS cross-linking agent OvPOSS, and organic cross-linking agent BIS in tetrahydrofuran and place in a container. Stir in a water bath at 50°C for 30 minutes under nitrogen protection until uniform Transparent, after rising to 60°C and adding initiator AIBN, stirring for 10 minutes, sealing, reacting at 60°C for 24 hours, taking out the gel, and repeatedly washing with tetrahydrofuran and water to remove unreacted monomers, to obtain The first network gel A;

[0054] Wherein, the quality of the photosensitive monomer is 7.3% of the quality of tetrahydrofuran, the quality of N-vinylpyrrolidone is 5.3% of the quality of tetrahydrofuran, and the quality of the POSS crosslinking agent OvPOSS is 15.7% of the sum of the quality of the photosensitive monomer and N-vinylpyrrolidone, The qual...

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Abstract

The invention relates to a preparation method of light-heat sensitive quick response plural gel. According to the plural gel, a light-sensitive monomer, N-vinyl pyrrolidone, OvPOSS and an organic cross-linking agent methylene-bis-acrylamide (BIS) form a first network, and BIS-cross-linked heat-sensitive monomer N-Isopropylacrylamide form a second network. The gel has the remarkable ultraviolet light and temperature sensitivity, can achieve rapid reversible swelling-deswelling changes, meanwhile has the good mechanical property, and has the potential to be applied to the field of drug sustained release and tissue engineering.

Description

technical field [0001] The invention belongs to a method for preparing a hydrogel, in particular to a method for preparing a hydrogel that can respond quickly to changes in temperature and light. Background technique [0002] Polymer gel refers to a system composed of a three-dimensional network structure of polymer compounds and a solvent, in which the polymers are connected by van der Waals force, chemical bond force, physical winding force, hydrogen bond force, etc. Since it is a three-dimensional network structure, it cannot be dissolved by solvents, and at the same time, it can be dispersed in solvents and can maintain a certain shape. Although the solvent cannot dissolve the polymer with a three-dimensional network structure, the solvophilic group in the polymer compound can be affected by the solvent to swell the polymer, which is also the reason for the formation of a polymer gel. [0003] Responsive polymer gel is a polymer gel whose structure, physical properties,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F283/12C08F220/34C08F226/10C08F120/54
CPCC08J3/075C08F120/54C08F283/12C08J2351/08C08J2433/24
Inventor 陈一
Owner HUNAN UNIV OF TECH
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