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Method for preparing non-ionic polyurethane Gemini surfactant

A surfactant and non-ionic technology, which is applied in the field of preparation of non-ionic polyurethane Gemini surfactant, can solve the problems of non-compliance with green chemistry and complexity, and achieve the effect of easy adsorption, effective surface tension and simple synthesis process

Inactive Publication Date: 2016-07-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent states that the raw material of the surfactant is easy to obtain without pollution, the reaction conditions are mild, and the post-treatment is simple, but the process of removing boric acid during the synthesis of the surfactant is too complicated, and benzene is used as a solvent in the reaction process, which is harmful to the environment and Biological organisms have potential safety risks and do not comply with the principles of green chemistry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Distill polyethylene glycol monomethyl ether under reduced pressure for 8 hours at 120°C and a vacuum of 0.09MPa to remove moisture; dry the three-necked bottle, stirrer, feeding tube and other instruments at 100°C After 2 hours, take it out and place it in a desiccator to cool; add 7.5 g of polyethylene glycol monomethyl ether and 1.28 g of epoxy octane with a number average molecular weight of 750 to a three-necked bottle with a stirrer and a thermometer, and add 0.56g of sodium hydroxide, stirred in a constant temperature water bath at 80°C, reacted for 10 hours, filtered to remove the solid sodium hydroxide, added 1.11g of isophorone diisocyanate, continued to react for 2 hours, cooled to 30°C, added 29.67g of distilled water Stir for 30 minutes and discharge to obtain a nonionic polyurethane Gemini surfactant with a solid content of 25%.

Embodiment 2

[0027] Example 2: Distill polyethylene glycol monomethyl ether under reduced pressure for 10 hours at 100°C and a vacuum of 0.09MPa to remove moisture; dry the three-necked flask, stirrer, feeding tube and other instruments at 100°C After 2 hours, take it out and place it in a desiccator to cool; in a three-necked bottle with a stirrer and a thermometer, add 11 g of polyethylene glycol monomethyl ether and 2.56 g of epoxy octane with a number average molecular weight of 550, and simultaneously add 1.12 Add 2.22 g of isophorone diisocyanate, continue to react for 2 hours, cool to 30 °C, add 36.82 g of distilled water and stir After 30 minutes of discharge, a nonionic polyurethane Gemini surfactant with a solid content of 30% can be obtained.

Embodiment 3

[0028] Example 3: Distill polyethylene glycol monomethyl ether under reduced pressure for 10 hours at 100 ° C and a vacuum of 0.09 MPa to remove moisture; dry the three-necked bottle, stirrer, feeding tube and other instruments at 100 ° C After 2 hours, take it out and place it in a desiccator to cool; add 11g of polyethylene glycol monomethyl ether and 3.68g of 1,2-epoxydodecane with a number average molecular weight of 550 to a three-necked bottle with a stirrer and a thermometer At the same time, add 1.12g of sodium hydroxide, stir in a constant temperature water bath at 80°C, react for 10 hours, filter to remove the solid sodium hydroxide, add 2.22g of isophorone diisocyanate, continue the reaction for 2 hours, cool to 30°C, add 67.6g of distilled water was stirred and discharged for 30 minutes to obtain a nonionic polyurethane Gemini surfactant with a solid content of 25%.

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PUM

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Abstract

The invention discloses a novel non-ionic polyurethane Gemini surfactant and a method for preparing the non-ionic polyurethane Gemini surfactant.The surfactant is the polyurethane Gemini surfactant obtained in the step that methoxy polyethylene glycol and alkylene oxide react with diisocyanate according to a certain proportion after ring-opening reaction.Only two steps are needed in the synthesis process, the synthesis process is simple, groups are not needed for protection, organic solvents are not used, and the surfactant is environmentally friendly.The Gemini surfactant is non-ionic polyurethane and has good biocompatibility and biodegradability.Compared with traditional surfactant, the surfactant can be adsorbed to the a gas-liquid interface more easily, surface tension can be effectively reduced, the use lower limit temperature is lower, and the surfactant can be applied to fields such as medicine conveying, sewage treatment and metal corrosion inhibition.

Description

technical field [0001] The invention relates to a preparation method of a surfactant, in particular to the preparation of a nonionic polyurethane Gemini surfactant. Background technique [0002] Surfactant is a substance that contains a hydrophilic group at one end and a hydrophobic group at one end. Adding a small amount can significantly reduce the surface tension of the solvent and change the surface state of the system, thereby producing wetting, emulsification, foaming, and solubilization. The structures of Gemini-type and Bola-type surfactants are different from traditional surfactants. Gemini surfactants are new types of surfactants that are connected by a linker to two traditional surfactants at or near their hydrophilic ends. Surfactant. Compared with traditional surfactants, Gemini surfactants are easier to adsorb on the gas-liquid interface, can reduce surface tension more effectively, and have a lower lower limit of use temperature; Bola-type surfactants have hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/42B01F17/52C08G18/48C09K23/42C09K23/52
CPCC08G18/4862C09K23/16
Inventor 金勇孙小鹏李汉平赖双权姜卫龙
Owner SICHUAN UNIV
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