A kind of synthetic method of photoresponsive linear azobenzene polyoxyethylene ether nonionic surfactant

A technology of linear azobenzene polyoxyethylene ether and linear azobenzene polyoxyethylene, which is applied in the field of photoresponsive linear azobenzene polyoxyethylene ether nonionic surfactant synthesis, and can solve pollution and foam cleaning Waste and other issues

Active Publication Date: 2019-11-22
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 polyoxyethylene ether chain azobenzene nonionic surfactant, which belongs to the technical field of textile chemical industry. A polyoxyethylene ether chain azobenzene nonionic surfactant was synthesized from 4-hydroxyazobenzene and polyethylene glycol. The polyoxyethylene ether chain azobenzene nonionic surfactant can undergo reversible isomerization from trans to cis under the irradiation of ultraviolet light and visible light, and change the tightness of its arrangement on the surface of the foam liquid film through steric hindrance. Realize the effect of low concentration and high foam stability. It can be used as wetting and penetrating agent, detergent and low-concentration surfactant, which solves the contradiction of foam stability before and after dyeing and finishing, and can be used in some low-cost foams to improve foam utilization and effectively recover foam. Pollution and waste of chemical reagents are 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 water consumption, energy consumption and pollution problems 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 The...

Claims

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Application Information

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Patent Type & Authority Patents(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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