Carboxylate type anionic Gemini surfactant and preparation method thereof

A surfactant and anion technology, which is applied in the field of carboxylate anionic Gemini surfactant and its preparation, can solve the problems of cumbersome synthesis steps of carboxylate anionic surfactant, difficult operation of purification method, etc., and achieve mature production process. , Wide application range, high surface activity effect

Active Publication Date: 2017-03-29
东营万福能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that carboxylate anionic surfactants have been synthesized, but it mainly studies the properties of liquid crystals, and its critical micelle concentration, surface tension and other properties are unknown; moreover, the synthesis steps of its carboxylate anionic surfactants Complicated, the purification method is not easy to operate, etc.

Method used

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  • Carboxylate type anionic Gemini surfactant and preparation method thereof
  • Carboxylate type anionic Gemini surfactant and preparation method thereof
  • Carboxylate type anionic Gemini surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: SL-3-SL synthetic route

[0042] Carboxylate-type anionic Gemini surfactant SL-3-SL, the structural formula is as follows:

[0043]

[0044] The synthetic route of SL-3-SL is as follows:

[0045]

[0046]Compound 1 was synthesized from diethyl malonate and n-bromodecane as starting materials. Compound 1 underwent a bilateral substitution reaction with 1,3-dibromopropane to generate compound 6. Compound 6 underwent saponification, acidification, and Acid and acid-base neutralization reaction to obtain the final compound 9 (carboxylate anionic Gemini surfactant SL-3-SL).

Embodiment 2

[0047] Embodiment 2: the synthesis of compound 1

[0048] Diethyl malonate and brominated n-decane were mixed according to the molar ratio of 1.2:1, added to the THF mixed solution containing NaH, stirred at 70°C for 18h, after cooling, the THF was removed by rotary evaporation, and petroleum ether and Extract with ice saturated citric acid solution, let it stand for 10min, take the upper organic liquid layer, and use MgSO 4 Drying, suction filtration, and rotary evaporator to remove petroleum ether, the obtained liquid continued to be distilled under reduced pressure (170°C-174°C / 5mmHg) to obtain the first step product compound 1, yield: 71.6%.

Embodiment 3

[0049] Embodiment 3: the synthesis of compound 6

[0050] Compound 1 and 1,3-dibromopropane were mixed according to the molar ratio of 2.4:1, added to the THF mixed solution containing NaH, stirred at 70°C for about 15 hours, after cooling, the THF was removed by rotary evaporation, and petroleum ether and ice Extract with saturated citric acid solution, let it stand for 10min, take the upper organic liquid layer, and use MgSO 4 Drying, suction filtration, rotary evaporator to remove petroleum ether, the obtained liquid is separated and purified through a silica gel column (silica gel: 300-400 mesh, eluent is pure petroleum ether) to obtain the second step product compound 6, the yield: 54.3%.

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Abstract

Belonging to the technical field of surfactant science and application, the invention discloses a carboxylate type anionic Gemini surfactant and a preparation method thereof. The synthesis of the surfactant includes: taking diethyl malonate and 1-bromodecane as the starting raw materials to synthesize a first step product 2-decyl diethyl malonate, carrying out bilateral substitution reaction, saponification, acidification, deacidification and acid-base neutralization reaction on the 2-decyl diethyl malonate and dibromoalkane in order so as to obtain the final carboxylate type anionic Gemini surfactant. The surfactant has very low cmc, thus indicating very high surface activity. The surfactant with the above structure is conducive to enriching the related knowledge of Gemini surfactant self-assembly, and the unique properties of the carboxylate type anionic Gemini surfactant are also beneficial to application in industrial production.

Description

technical field [0001] The invention relates to a carboxylate-type anionic Gemini surfactant and a preparation method thereof, belonging to the technical 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, treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/00C07C51/41C07C55/02C09K23/00
CPCC07C51/09C07C51/38C07C51/412C07C67/343C09K23/00
Inventor 裴晓梅张群李文楷宋冰蕾崔正刚
Owner 东营万福能源科技有限公司
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