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A kind of zwitterionic organosilicon surfactant and preparation method thereof

A technology of surfactant and zwitterion, which is applied in the field of zwitterionic silicone surfactant and its preparation, can solve the problem that the silicone surfactant is not deep enough, and overcome the shortcomings of foam suppression, easy to scale up production, and novel structure Effect

Active Publication Date: 2021-09-07
杨凌单色生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on organosilicon surfactants is not deep enough, and it is necessary to increase research efforts, grasp the leading direction of organosilicon surfactants towards high efficiency and greening, and start from molecular structure design to develop materials that are easy to obtain, novel in structure, and high in performance. Unique Silicone Surfactants Are a Research Hotspot Today

Method used

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  • A kind of zwitterionic organosilicon surfactant and preparation method thereof
  • A kind of zwitterionic organosilicon surfactant and preparation method thereof
  • A kind of zwitterionic organosilicon surfactant and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] A zwitterionic organic silicon surfactant is characterized in that its molecular structural formula is: structural formula I:

[0023]

[0024] or structural formula Ⅱ:

[0025]

[0026] Among them, n is 100-500, m is 50-100; R 1 for -CH 2 -COO - , R is Example 2

[0027] A preparation method of a zwitterionic silicone surfactant: said structural formula I or structural formula II is realized by the following two-step reaction:

[0028] Add the 1-substituted aziridine reactant dropwise to the reaction flask containing amino silicone oil or carboxyl silicone oil to carry out the first step aziridine ring-opening reaction, wherein the total ammonia value or total carboxyl value of the amino silicone oil or carboxyl silicone oil participating in the reaction The molar ratio to 1-substituted aziridine is 1:1; under weak alkaline conditions with a pH value of 7 to 9, an anionic etherifying agent is added to the above reactant for the second step of quaterniza...

Embodiment 3

[0037] Further, a kind of preparation method of zwitterionic silicone surfactant, concrete steps are:

[0038] Add the 1-substituted aziridine reactant dropwise to the reaction bottle containing the ethanol solution of amino silicone oil or carboxyl silicone oil with a solution mass concentration of 30% to 35% to carry out the first step aziridine ring-opening reaction, wherein the amino group participating in the reaction The molar ratio of the total ammonia value or total carboxyl value of silicone oil or carboxyl silicone oil to 1-substituted aziridine is 1:1, react at 70-90°C for 6-10 hours; 2 CO 3 Adjust the alkalinity to pH=7.5~9, add an anionic etherification agent to carry out the second step of quaternization reaction, and the molar ratio of the total ammonia value or total carboxyl value of the amino silicone oil or carboxyl silicone oil participating in the reaction is 4~6:1 , react at 60-90°C for 8-12 hours; after the reaction, remove the insoluble matter, concent...

Embodiment 4

[0040] Preferably, the 1-substituted aziridine is tert-butyl aziridine-1-carboxylate; the anion etherifying agent is sodium 3-chloro-2-hydroxypropanesulfonate.

[0041] A preparation method of zwitterionic silicone surfactant:

[0042] Add 1.43g (i.e.: 0.01mol) of aziridine dropwise in a reaction flask containing carboxyl silicone oil (wherein, carboxyl silicone oil is 100g, weight average molecular weight 20000, carboxyl value 0.103mmol / g) ethanol solution with a solution quality of 300g -1-tert-butyl carboxylate, reacted at 70°C for 10h; 2 CO 3 Adjust the pH value to 9, add 7.84g (i.e.: 0.04mol) sodium 3-chloro-2-hydroxypropanesulfonate, raise the temperature to 90°C and react for 8h; remove the insoluble matter after the reaction, concentrate the reaction solution, and use toluene column layer Purify and isolate the product by analytical method, and dry it in vacuum to constant weight to obtain the product.

[0043] Its structural formula is as follows:

[0044]

[0...

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Abstract

The invention discloses a zwitterionic silicone surfactant and a preparation method thereof. The surfactant is prepared through the following steps: in a reaction bottle equipped with amino silicone oil (or carboxyl silicone oil), drop quantitative 1-substituted aziridine reactants to carry out the first step aziridine ring-opening reaction; Under certain conditions, a quantitative amount of anionic etherifying agent is added to the above-mentioned reactants to carry out the second step of quaternization reaction to obtain a zwitterionic silicone surfactant with a molecular structural formula of:

Description

technical field [0001] The invention relates to a surfactant, in particular to a zwitterionic organic silicon surfactant and a preparation method thereof. Background technique [0002] Silicone surfactant is a new type of surfactant developed along with new silicone materials, which has excellent performance of reducing surface tension and excellent wettability, defoaming and foam stabilizing properties. Like general surfactants, it is a class of organic compounds that contain both hydrophobic groups and hydrophilic groups. Silicone surfactants are composed of polysiloxane and hydrophilic groups. In addition to the common properties of ordinary surfactants, they also have better surface activity and ease of spreading than ordinary surfactants. These characteristics come from Due to the low surface tension and weak intermolecular forces of polysiloxane. With the further deepening of people's understanding of silicone surfactants, the variety of silicone surfactants continue...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/54C08G77/385C08G77/388C08G77/392C09K23/54
CPCC08G77/388C08G77/385C08G77/392C09K23/00
Inventor 任雁鹏郭胜利
Owner 杨凌单色生物科技有限公司
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