Preparation method of photoresponse hydrogel containing azo monomers

A light-responsive, hydrogel technology, applied in the field of photochemical synthesis, can solve the problems of cumbersome photo-responsive hydrogel synthesis methods, and achieve the effects of mild reaction conditions, mild reaction conditions and simple steps.

Inactive Publication Date: 2010-09-08
CHANGZHOU JIESEN CHEM MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above defects, the technical problem to be solved in the present invention is to provide a method for preparing a photoresponsive hydrogel containing an azo monomer in view of the cumbersome problem of the existing photoresponsive hydrogel synthesis method

Method used

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  • Preparation method of photoresponse hydrogel containing azo monomers
  • Preparation method of photoresponse hydrogel containing azo monomers
  • Preparation method of photoresponse hydrogel containing azo monomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Preparation of 4-sulfonic acid-4'acryloyloxyazobenzene hydrogel at a temperature of -40°C and an azo monomer

[0018] Combine HEA (1.5g), PEGDA-600 (0.15g), N,N methylene bisacrylamide (0.15g), camphor kun (CQ) and ethyl p-N,N-dimethylaminobenzoate (EDMAB) ) Each (0.075g) mixed solution was sonicated for 10 minutes, and 0.015g of 4-sulfonic acid-4'acryloyloxyazobenzene was added respectively. Adjust the temperature to -40°C in a low-temperature polymerization box, and irradiate it with a visible light (50mw) for 5 minutes. The prepared colloid was rinsed with water 5 times and placed in a vacuum oven at 40°C for 24 hours.

[0019] The prepared microstructure difference is as figure 1 Shown. The structural formula of the azo monomer is shown in (I).

[0020]

Embodiment 2

[0021] Example 2: Preparation of 2-chloro-4-sulfonic acid-4'acryloyloxyazobenzene hydrogel at a temperature of 0°C and an azo monomer

[0022] (1) Sonicate the mixed solution of HEA (1.5g), PEGDA-400 (0.075g), N, N methylene bisacrylamide (0.075g), and TPO (0.015g) for 10 minutes, and add 2-chloro- 0.03 g of 4-sulfonic acid-4'acryloyloxy azobenzene and water (4.5 g). The temperature was adjusted to 0°C in a low-temperature polymerization box, and a visible lamp (100mw) was used to irradiate each for 10 minutes. The prepared colloid was rinsed with water 5 times and placed in a vacuum oven at 40°C for 24 hours.

[0023] The prepared microstructure difference is as figure 2 As shown, the structural formula of the azo monomer is as shown in (II).

[0024]

Embodiment 3

[0025] Example 3: Preparation of 2-cyano-4-sulfonic acid group-2'-carboxy-4'-acryloyloxy azobenzene hydrogel at a temperature of 20°C and the azo monomer

[0026] (1) Sonicate the mixed solution of HEA (1.5g), PEGDA-200 (0.225g), N,N methylenebisacrylamide (0.225g), and TPO (0.03g) for 10 minutes, and add 2-cyano- 0.045 g of 4-sulfonic acid-2'-carboxy-4'-acryloyloxyazobenzene and water (6g). Adjust the temperature in the heating jacket to 20°C, and irradiate it with a visible light (120mw) for 20 minutes. The prepared colloid was rinsed with water 5 times and placed in a vacuum oven at 40°C for 24 hours.

[0027] The prepared microstructure difference is as image 3 As shown, the structural formula of the azo monomer is as shown in (III).

[0028]

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Abstract

The invention relates to the technical field of photochemistry synthesis, in particular to a preparation method of photoresponse hydrogel. In the preparation method of the photoresponse hydrogel containing the azo monomers, acrylicester is used as a main component, the use level of the azo monomers is 1-5 percent of the weight of acrylicester, the use level of N,N methylene-bisacrylamide is 5-20 percent of the weight of acrylicester, the use level of Poly(ethylene glycol) diacrylate is 5-20 percent of the weight of acrylicester, and the use level of water is 200-400 percent of the weight of acrylicester. Visible light is adopted for irradiation in the reaction, camphorquinone and the 4-N,N-(dimethylamino)-benzoic acid ethyl ester having the same weight are adopted and account for 0.5-5 percent of the weight of acrylicester, the light intensity of a light source is controlled to be 30-300 mW, and the temperature for preparation is 80 DEG C below zero to 80 DEG C. The preparation method of the photoresponse hydrogel comprises the following steps of: injecting prepared mixture into a transparent and closed die, adjusting the temperature, and irradiating for 2-60 minutes by adopting visible light source.

Description

Technical field [0001] The invention relates to the technical field of photochemical synthesis, in particular to a preparation method of a light-responsive hydrogel. Background technique [0002] Smart hydrogels include temperature-sensitive hydrogels, pH-sensitive hydrogels, light-sensitive hydrogels, glucose-sensitive hydrogels, and electrically-sensitive hydrogels. The most widely used temperature-sensitive hydrogels and pH-sensitive hydrogels have their own shortcomings: temperature-sensitive hydrogels are limited by thermal diffusion and the adverse effects of temperature on target molecules, and pH-sensitive hydrogels are limited Because of the diffusion of hydrogen ions. In contrast, light stimulation can achieve instantaneity and accuracy, so light-responsive hydrogels have special advantages over the former two. Azobenzene is the most common group for preparing light-responsive hydrogels. The photoisomerization speed of the azophenyl group is different at different te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/28C08F220/38C08F2/48
Inventor 胡春青袁惠益赵贤恽鹏飞顾明天
Owner CHANGZHOU JIESEN CHEM MATERIAL TECH
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