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Ultraviolet radiation-temperature response type macromolecule hydrogel

A polymer hydrogel, temperature-responsive technology, applied in the field of intelligent polymer materials, can solve the problems of poor deformation stability and deformation controllability of photodeformable polymer hydrogel materials, limited application research, etc., and achieve industrialization. The effect of easy implementation, simple process method and easy control

Inactive Publication Date: 2008-05-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deformation stability and deformation controllability of photodeformable polymer hydrogel materials prepared by this physical method are poor, which limits its application research.
However, there are few reports at home and abroad on the preparation of intelligent photodeformable polymer hydrogel materials by chemical methods, and there are no relevant reports on the preparation of photo-temperature-induced deformation polymer hydrogels by chemical methods.

Method used

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  • Ultraviolet radiation-temperature response type macromolecule hydrogel
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Synthesize an intermediate monomer AAAB containing an azophenyl group in the molecular chain by an existing mature method: dissolve 7.8g of p-aminoazobenzene in 80ml of benzene, add 5.6ml of triethylamine and a small amount of p-phenylenedi Phenol was dissolved by stirring, and 4ml of acryloyl chloride was added dropwise, heated under reflux at 60°C for 3h, cooled after the end, and the resulting crystals were filtered and dried. Dissolve the product with a small amount of ethanol and put it in the refrigerator for recrystallization. Orange-yellow crystals are precipitated, and the product is obtained after drying.

[0032] 2. Prepare P(NIPAAm-co-AAAB) copolymer hydrogel by using the intermediate monomer AAAB: Weigh the refined monomer NIPAAm and the intermediate monomer AAAB respectively according to the molar ratio NIPAAm:AAAB=99:1, and dissolve them with absolute ethanol Prepare a solution, adjust the amount of absolute ethanol in the mixing process so that the co...

Embodiment 2

[0036] 1. Same as embodiment 1.

[0037] 2. Prepare P(NIPAAm-co-AAAB) copolymer hydrogel by using the intermediate monomer AAAB: Weigh the refined monomer NIPAAm and the intermediate monomer AAAB respectively according to the molar ratio NIPAAm:AAAB=99:1, and dissolve them with absolute ethanol Prepare the solution, adjust the amount of absolute ethanol in the mixing process so that the concentration of NIPAAm in the mixed solution is controlled at 1mol / l. Add 0.04mol cross-linking agent MBAA to each liter of mixed solution, dissolve and stir evenly, and pass nitrogen for 20 minutes, then add 0.008mol initiator AIBN to each liter of mixed solution, stir and dissolve, continue to pass nitrogen for 30 minutes, and drop it with a dropper Add 1.0ml of TEMED, stir and mix evenly, pour the solution into the mold, put the mold in a constant temperature environment of 70°C, let it gel for 12 hours, and obtain the P(NIPAAm-co-AAAB) copolymer hydrogel;

[0038] The resulting copolymeri...

Embodiment 3

[0041] 1. Same as embodiment 1.

[0042] 2. Prepare P(NIPAAm-co-AAAB) copolymer hydrogel by using the intermediate monomer AAAB: Weigh the refined monomer NIPAAm and the intermediate monomer AAAB respectively according to the molar ratio NIPAAm:AAAB=99:1, and dissolve them with absolute ethanol A mixed solution is made, and the amount of absolute ethanol is adjusted during the mixing process so that the NIPAAm concentration in the mixed solution is controlled at 1mol / l. Add 0.04mol cross-linking agent MBAA to each liter of mixed solution, dissolve and stir evenly, and pass nitrogen for 20 minutes, then add 0.01mol initiator AIBN to each liter of mixed solution, stir and dissolve, continue to pass nitrogen for 40 minutes, and drop it with a dropper Add 1.5ml of TEMED, stir and mix evenly, pour the solution into the mold, put the mold in a constant temperature environment of 75°C, let it gel for 12 hours, and obtain the P(NIPAAm-co-AAAB) copolymer hydrogel;

[0043] The resulti...

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Abstract

The invention discloses a preparation method of ultraviolet-temperature responsible macromolecule aqueous gel, as P(NIPAAm-co-AAAB) copolymer aqueous gel, which comprises that 1, synthesizes intermediate monomer AAAB containing azobenzene group in molecule chain, 2, uses NIPAAm and intermediate monomer AAAB to prepare P(NIPAAm-co-AAAB) copolymer aqueous gel. The invention has simple process, low cost, non demand for special device, easy industrialization, non pollution or the like. The aqueous gel can be used to produce micro optical device as optical switch and light sensor, used in special conditions refine, soft or / and wet.

Description

technical field [0001] The invention relates to an intelligent polymer material technology, specifically an intelligent polymer deformation material with reversible ultraviolet light-temperature responsiveness, that is, the material can be deformed under ultraviolet light irradiation, and can be restored to its original state when the light is stopped. The original shape; when the temperature rises above a certain critical temperature, the material shrinks, and the material expands and recovers when the temperature returns to the intelligent polymer hydrogel preparation method. Background technique [0002] Smart materials are a hot spot in the field of new materials research at home and abroad in recent years, usually composed of matrix materials, sensitive components, actuation units, and information processors. Among them, the actuation unit is an extremely important component. Its main function is to respond appropriately by changing its own geometric shape or other prop...

Claims

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Application Information

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IPC IPC(8): C08F220/60C08F220/56
Inventor 赵义平陈莉张玉欣
Owner TIANJIN POLYTECHNIC UNIV
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