Synthetic method of photo-responsive linear azobenzene polyoxyethylene ether nonionic surfactant

A technology of linear azobenzene polyoxyethylene ether and non-ionic surface, which is applied in the field of photoresponsive linear azobenzene polyoxyethylene ether nonionic surfactant synthesis, which can solve the problems of pollution, foam cleaning waste, etc.

Active Publication Date: 2017-09-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some technical problems in foam dyeing and finishing that limit its application, such as the need for stable foam to improve dyeing uniformity, the waste of residual foam cleaning after dyeing and finishing, and the pollution of emissions. Through the new azobenzene polyoxyethylene type nonionic surfactant can solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) 10.00wt% of 4-hydroxyazobenzene, 10.00wt% anhydrous potassium carbonate and 8.00wt% potassium iodide were added to the three-necked flask, and then tetrahydrofuran with the same quality as the mixture was added to dissolve the 4-hydroxyazobenzene , stirring and heating to 80°C, and constant temperature for 30min. Add 8.00wt% dibromoethane to 20mL tetrahydrofuran to make a solution, then slowly add it dropwise into a three-necked flask, then stir and heat to reflux at 80°C for 16h, and cool to room temperature. The resulting solution was rotary evaporated to remove tetrahydrofuran, then extracted with dichloromethane, and rotary evaporated to remove dichloromethane. Finally, it was purified with a silica gel column (silica gel: 300-400 mesh, V (petroleum ether): V (ethyl acetate) = 7:1 ) take the first layer of solution and then dry it to obtain the product of the first step.

[0016] (2) In order to further improve the grafting rate of reaction, add sodium carbonat...

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PUM

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Abstract

The invention discloses a preparation method of a photo-responsive linear azobenzene polyoxyethylene ether nonionic surfactant, belonging to the technical fields of textile and chemical industry. The azobenzene polyoxyethylene ether nonionic surfactant is synthesized from 4-hydroxyazobenzene and polyethylene glycol. The azobenzene polyoxyethylene ether nonionic surfactant can be subjected to reversible heterogeneous treatment from an anti-form to a cis-form under the irradiation of ultraviolet light and visible light, and the tightness of the azobenzene polyoxyethylene ether nonionic surfactant arrayed on the surface of a foam liquid membrane is changed through steric hindrance, so that the effects of low concentration and high foam stabilizing property are achieved. The azobenzene polyoxyethylene ether nonionic surfactant can be used as a wetting permeating agent, a detergent and a low-concentration surfactant, so that the demand contradiction that foam has different stabilities before and after being dyed and finished is solved, the utilization rate of the foam can be increased, the foam can be effectively recycled, the pollution is alleviated, and the wasting of a chemical reagent is reduced.

Description

technical field [0001] The invention belongs to the technical field of textile chemical industry, and in particular relates to a method for synthesizing a light-responsive linear azobenzene polyoxyethylene ether nonionic surfactant. Background technique [0002] The current situation of high water consumption, high energy consumption and high pollution in the traditional printing and dyeing industry needs to be improved urgently. The use of foam dyeing and finishing technology can effectively improve the problems of water consumption, energy consumption and pollution in the production process, and it is a production and processing method with potential. However, there are some technical problems in foam dyeing and finishing that limit its application, such as the need for stable foam to improve dyeing uniformity, the waste of residual foam cleaning after dyeing and finishing, and the pollution of emissions. Through the new azobenzene polyoxyethylene type nonionic surfactant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/42C08G65/333D06M15/53D06P1/613C09K23/42
CPCD06M15/53D06P1/613C08G65/33396C09K23/16
Inventor 殷允杰吴康亭萧欣彤陈少瑜王潮霞
Owner JIANGNAN UNIV
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