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Quaternary ammonium salt organic silicon gemini surfactant and preparation method thereof

A gemini surface and quaternary ammonium salt technology, which is applied in organic chemistry, chemical instruments and methods, compounds of group 4/14 elements of the periodic table, etc., can solve the problems of less reports on organosilicon gemini surfactants, and achieve excellent results Surface activity, easy control, effect of improving hydrolysis resistance

Active Publication Date: 2016-02-03
湖北天喜达生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the surface activity of existing silicone gemini surfactants needs to be improved, and most of the prepared silicone gemini surfactants are nonionic, and there are few reports about cationic silicone gemini surfactants

Method used

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  • Quaternary ammonium salt organic silicon gemini surfactant and preparation method thereof
  • Quaternary ammonium salt organic silicon gemini surfactant and preparation method thereof
  • Quaternary ammonium salt organic silicon gemini surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Mix 85g of polyethylene glycol glycidyl ether and 81g of α-hydrogen-ω-hydroxyl-polydimethylsiloxane with 100mL of acetone, then add 0.5g of tetrabutylammonium bromide and 0.5g of mass Fraction 30% sodium hydroxide solution, tetrabutylammonium bromide and sodium hydroxide solution play a catalytic role, then stir and reflux at 70°C for 5h, then wash with a mixed solvent of 30mL acetone and 30mL n-hexane for several times, rotate The solvent was removed by evaporation, and vacuum-dried to obtain a light yellow viscous liquid, which was epoxy-based polyether-modified siloxane.

[0033] Step 2, at 45°C, add 50mL of hydrochloric acid solution (0.202mol / L), 10g of C 12 h 25 NH(CH 3 ) 2 After reacting with 20mL of absolute ethanol for 1h, 21.67g of epoxy polyether modified siloxane prepared in step 1 was added dropwise, and reacted for 10h until the amine value (determined by hydrochloric acid-isopropanol titration) no longer changed. After the reaction, wash with ...

Embodiment 2

[0035] Step 1. Mix 90g of polyethylene glycol glycidyl ether and 83g of α-hydrogen-ω-hydroxyl-polydimethylsiloxane with 100mL of acetone, then add 0.5g of tetrabutylammonium bromide and 0.5g of mass A 30% fraction of sodium hydroxide, tetrabutylammonium bromide and sodium hydroxide solution acted as a catalyst, then stirred and refluxed at 60°C for 8 hours, then washed with a mixed solvent of 40mL acetone and 40mL n-hexane for several times, and evaporated by rotary evaporation Remove the solvent and dry in vacuum to obtain a light yellow viscous liquid, which is epoxy-based polyether-modified siloxane.

[0036] Step 2, at 40°C, add 55mL of hydrochloric acid solution (0.202mol / L), 7.0g of C 12 h 25 NH(CH 3 ) 2 After reacting with 20mL isopropanol for 1h, add 25g of the epoxy polyether modified siloxane prepared in step 1 dropwise, and react for 12h until the amine value (determined by hydrochloric acid-isopropanol titration) no longer changes. After the reaction, wash with...

Embodiment 3

[0038]Step 1. Mix 95g of polyethylene glycol glycidyl ether and 85g of α-hydrogen-ω-hydroxyl-polydimethylsiloxane with 100mL of acetone, then add 0.5g of tetrabutylammonium bromide and 0.5g of mass 30% fraction of sodium hydroxide, tetrabutylammonium bromide and sodium hydroxide solution play a catalytic role, then stirred and refluxed at 55°C for 6h, then washed with a mixed solvent of 35mL acetone and 35mL n-hexane for several times, and rotary evaporated Remove the solvent and dry in vacuum to obtain a light yellow viscous liquid, which is epoxy-based polyether-modified siloxane.

[0039] Step 2, at 50°C, add 60mL of hydrochloric acid solution (0.202mol / L), 8.4g of C 12 h 25 NH(CH 3 ) 2 After reacting with 20mL of distilled water for 1h, 23g of epoxy polyether modified siloxane prepared in step 1 was added dropwise, and reacted for 11h until the amine value (determined by hydrochloric acid-isopropanol titration) no longer changed. After the reaction, wash with cyclohexa...

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Abstract

The invention relates to a quaternary ammonium salt organic silicon gemini surfactant and a preparation method thereof. The preparation method is prepared by the following steps of mixing polyethylene glycol diglycidyl ether, alpha-hydrogen-omega-hydroxyl-polydimethylsiloxane and acetone, adding tetrabutylammonium bromide and sodium hydroxide solutions, stirring and refluxing at the temperature of 50 to 70 DEG C, so as to obtain epoxy polyether-modified siloxane; adding a hydrochloric acid solution, long-strand alkyl dimethye third amine and a solvent into a reactor, uniformly stirring, dripping the epoxy polyether-modified siloxane, and reacting until the amine value is not changed, so as to obtain a target product. The quaternary ammonium salt organic silicon gemini surfactant has the advantages that the product has excellent surface activity, the surface tension in the water solution is minimum to 28.24mN / m, and the critical micelle concentration is minimum to 1.5*10-6mol / L, and is far lower than the critical micelle concentration of the traditional hydrocarbon single-strand surfactant DTAB (dodecyl trimethyl ammonium bromide); by using the linking of covalent bonds, the hydrolysis resistance property or organic silicon is improved; the advantages of the quaternary ammonium salt organic silicon gemini surfactant and the organic silicon surfactant are simultaneously realized.

Description

Technical field: [0001] The invention relates to a preparation method of a gemini surfactant, in particular to a quaternary ammonium salt organosilicon gemini surfactant and a preparation method thereof. Background technique: [0002] Due to the flexibility of silicon-oxygen chains, organosilicon surfactants are arranged more closely at the water interface, so they have the characteristics of high surface activity, good wetting and spreading, and good emulsification stability. At the same time, they have low physiological toxicity. It has been widely used as a dispersant, defoamer, softener, etc. in the fields of textiles, daily chemicals, leather, and pesticides. [0003] Since Bunton synthesized gemini surfactants for the first time in 1971, scholars at home and abroad have found that gemini surfactants have better surface activity than traditional single-chain surfactants, lower critical micelle concentration (cmc) and Better synergy, etc. [BuntonC.A., RobinsonL., Schaak...

Claims

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Application Information

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IPC IPC(8): B01F17/18B01F17/54B01F17/42C07F7/18C09K23/18C09K23/42C09K23/54
Inventor 鲍艳郭佳佳马建中王宪
Owner 湖北天喜达生物科技有限公司
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