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Double-tail gemini quaternary ammonium salt type cationic surface active agent and preparation method thereof

A technology of gemini quaternary ammonium salt and surfactant is applied in the field of long-chain aliphatic amine derivatives and their preparation, which can solve the problem of not finding research reports on double-tailed gemini cationic surfactants, and achieve good lipophilic performance and reaction Mild conditions and highly ordered effects

Inactive Publication Date: 2008-12-31
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, in published papers and patents, no research reports on this type of double-tailed gemini cationic surfactants have been found.

Method used

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  • Double-tail gemini quaternary ammonium salt type cationic surface active agent and preparation method thereof
  • Double-tail gemini quaternary ammonium salt type cationic surface active agent and preparation method thereof
  • Double-tail gemini quaternary ammonium salt type cationic surface active agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Accurately weigh 15.414g (0.042mol) of behenylmethyl tertiary amine in a two-necked flask equipped with a reflux condenser, add 4.04g (0.02mol) of dibromo-n-propane at room temperature, add 20ml of acetonitrile, and After injecting nitrogen gas for 20 minutes, the reaction was performed under magnetic stirring at 83° C. for 10 to 15 hours. After the reaction, the solvent was distilled off under reduced pressure to obtain a yellowish colloidal substance, which was precipitated at low temperature by adding acetone, filtered, washed twice with acetone, and dried in vacuo to obtain a white powdery solid 212-3-212.

Embodiment 2

[0031] Accurately weigh 15.414g (0.042mol) of behenylmethyl tertiary amine in a two-necked flask equipped with a reflux condenser, add 4.32g (0.02mol) of dibromobutane at room temperature, add 20ml of acetonitrile, After passing nitrogen gas for 20 minutes, the reaction was performed under magnetic stirring at 83° C. for 10 to 15 hours. After the reaction, the solvent was distilled off under reduced pressure to obtain a yellowish colloidal substance, which was precipitated at low temperature by adding acetone, filtered and washed twice with acetone, and dried in vacuum to obtain a white powdery solid 212-4-212.

Embodiment 3

[0033] Accurately weigh 15.414g (0.042mol) of behenylmethyl tertiary amine in a two-necked flask equipped with a reflux condenser, add 4.88g (0.02mol) of dibromo-n-hexane at room temperature, add 20ml of acetonitrile, and After injecting nitrogen gas for 20 minutes, the reaction was performed under magnetic stirring at 83° C. for 10 to 15 hours. After the reaction, the solvent was distilled off under reduced pressure to obtain a yellowish colloidal substance, which was precipitated at low temperature by adding acetone, filtered and washed twice with acetone, and dried in vacuum to obtain a white powdery solid 212-6-212.

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Abstract

The invention relates to a preparation and purification method of bicaudal gemellus quaternary ammonium salt type cationic surfactant. The preparation method comprises the following steps in sequence: (1) metric acetonitrile is added into a dual-bottleneck distilling flask that is provided with a refluxing and condensing tube, and simultaneously, long-chain dialkyl methyl tertiary amine and relevant saturated dihalide are added thereof; (2) nitrogen is pumped for 10 to 20 minutes for deoxidizing; (3) a magnetic mixing reaction is carried through for 10 to 15 hours under the condition of 78 to 83 DEG C. after the reaction is finished, the solvent is removed by a decompression and distillation way to obtain yellowish colloid substance, then acetone is added, precipitated under low temperature, filtered and then washed twice by using the acetone, finally, white powdery solid is obtained by the vacuum drying. When the white powder is used for element analysis and hydrogen spectrum analysis of nuclear magnetic resonance, the analysis result is accordance with that of the target products. The method of the invention has cheap and easy available materials, moderate reaction condition, complete reaction and high reaction yield coefficient, which also can be carried through in common solvents, such as ethanol and so on.

Description

technical field [0001] The invention relates to a method for preparing and purifying a two-tailed gemini quaternary ammonium salt type cationic surfactant, belonging to a class of long-chain fatty amine derivatives and a preparation method thereof. Background technique [0002] LB (Langmuir-Blodgett) membrane is an ultra-thin ordered membrane. It disperses amphiphilic molecules with both hydrophilic head and hydrophobic tail on the water surface (subphase), and gradually compresses its occupied area on the water surface. And a kind of film obtained by arranging into a monolayer, and then transferred and deposited onto a solid substrate, the monolayer molecular film on the subphase is called a Langmuir monolayer film. LB thin film technology is a film-making technology that can precisely control the thickness of the film at the molecular level. LB film mainly has the following advantages: 1) The thickness of the film can be precisely controlled at the nanometer level; 2) The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/18C09K23/18
Inventor 冯玉军陈志鲁红升操卫平
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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