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Asymmetric cationic Gemini surfactant containing hydroxyl group in coupling link

A technology of surfactants and hydroxyl groups, which is applied in the field of asymmetric cationic Gemini surfactants, can solve the problems of limiting the application range of Gemini surfactants, and achieve the effect of enhanced aggregation ability, excellent performance and high surface activity

Active Publication Date: 2016-09-28
沈阳鑫正亚商贸有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this common Gemini surfactant has small changes in the hydrophobic region, and hydrophobic interaction is also an important factor affecting the self-organization behavior of surfactants, so this undoubtedly limits the application of Gemini surfactants to a certain extent. scope

Method used

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  • Asymmetric cationic Gemini surfactant containing hydroxyl group in coupling link
  • Asymmetric cationic Gemini surfactant containing hydroxyl group in coupling link
  • Asymmetric cationic Gemini surfactant containing hydroxyl group in coupling link

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: 6-3(OH)-18 synthetic route

[0029] The asymmetrical cationic Gemini surfactant 6-3(OH)-18 containing a hydroxyl group in the connecting chain has the following structural formula:

[0030]

[0031] The synthetic route is as follows:

[0032] Synthetic route of 6-3(OH)-18

[0033]

[0034] Using N,N-dimethyl n-hexylamine and 1,3-dibromoisopropanol as raw materials, synthesize the unilateral substitution product product 2-hydroxy-3-bromohexane ammonium bromide; 2-hydroxy-3-bromohexyl Alkyl ammonium bromide reacted with N,N-dimethyl octadecyl amine to synthesize a new type of cationic Gemini surfactant with hydroxyl group in the asymmetric linkage chain.

Embodiment 2

[0035] Embodiment 2: the synthesis of intermediate product

[0036] Synthesis of 2-Hydroxy-3-Bromohexane Ammonium Bromide

[0037] Mix N,N-dimethyl-n-hexylamine and 1,3-dibromoisopropanol at a molar ratio of 1:4, add absolute ethanol, stir at 70°C for 12 hours, and cool down. Ethanol was removed by rotary evaporation. Add ether for extraction (3 times), let stand for 10 min, and collect the viscous liquid in the lower layer. After filtration, the filtrate was rotary evaporated to remove diethyl ether to obtain the product. Yield: 41.8%.

Embodiment 3

[0038] Embodiment 3: quaternization reaction synthesis product

[0039] Synthesis of 6-3(OH)-18

[0040] 2-Hydroxy-3-bromohexylammonium bromide and N,N-dimethyloctadecylamine were mixed in a molar ratio of 1:1 in the reactor, and reacted at 80°C for 24 hours. After the reaction was cooled, ethanol was removed by rotary evaporation. The filtrate was obtained by recrystallization with ethanol / ethyl acetate mixed solvent, and the filtrate was recrystallized three times with ethanol / anhydrous diethyl ether mixed solvent to obtain the final product, which was a white solid. Yield: 21.4%.

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Abstract

The invention discloses an asymmetric cationic Gemini surfactant containing a hydroxyl group in a coupling link, and belongs to the science and application fields of surfactants. Synthesis for the surfactant comprises the following steps: enabling N, N- dimethyl normal hexyl amine (N, N-dimethyl n-octylamine) to react with 1,3-dibromoisopropanol to obtain a single-sided substitution product 2-hydroxyl-3-bromohexane ammonium bromide (2-hydroxyl-3-bromooctane ammonium bromide); and enabling the 2-hydroxyl-3-bromohexane ammonium bromide (2-hydroxyl-3-bromooctane ammonium bromide) to carry out quaterisation so as to connect with N, N-dimethyl hexadecylamine (N, N-dimethyl octadecylamine). In a molecular structure of the surfactant disclosed by the invention, alkane chains of tertiary amine are different in length, and one hydroxyl is included in the coupling link. The surfactant is a quaternary ammonium salt type asymmetric cationic Gemini surfactant containing the hydroxyl group.

Description

technical field [0001] The invention relates to an asymmetric cationic Gemini surfactant with a hydroxyl group in the connecting chain, which belongs to the field of surfactant science and application. Background technique [0002] Gemini surfactants, also known as Gemini surfactants, Gemini surfactants, Gemini surfactants or coupled surfactants, are two traditional surfactant molecules in their hydrophilic head groups or close to them through a linking group. A new type of surfactant formed by linking hydrophilic head groups together. Due to the particularity of its structure, gemini surfactants exhibit many unique properties that conventional surfactants do not possess, so they have strong application potential. Gemini surfactant has good solubilization, wetting, foaming and saponification dispersing abilities, and can be widely used in various fields. In addition, in some special fields, it can be used as a template for preparing nanomaterials And anti-adhesive, treatme...

Claims

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Application Information

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IPC IPC(8): B01F17/18B01F17/38C07C215/18C07C213/08C07C213/00C09K23/18C09K23/38
CPCC07C215/18C09K23/00
Inventor 裴晓梅张群李文楷宋冰蕾崔正刚
Owner 沈阳鑫正亚商贸有限公司
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