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Gemini surfactant and preparing method thereof

A technology of surfactants and gemini surfaces, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve problems such as reducing the surface activity of surfactants, loose arrangement, and limiting the scope of use

Inactive Publication Date: 2007-06-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the tendency of separation between the polar groups of NPQT due to repulsion, it is not tightly arranged on the interface, thereby reducing the surface activity of the surfactant and limiting its scope of use. Reports on the Synthesis of Gemini Surfactant Molecules as Structural Units

Method used

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  • Gemini surfactant and preparing method thereof
  • Gemini surfactant and preparing method thereof
  • Gemini surfactant and preparing method thereof

Examples

Experimental program
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Embodiment Construction

[0012] Add 22g (0.1mol) of p-nonylphenol, 4.4g (0.11mol) of sodium hydroxide and 50ml of isopropanol into a three-necked flask, heat to 50°C-60°C, stir with nitrogen for 1-2h, and slowly add 21g ( 0.11mol) of 3-chloro-2-hydroxypropyltrimethylammonium chloride, stirred for 2-3 hours, cooled to room temperature, filtered to remove inorganic matter, rinsed with isopropanol for 2-3 times, combined with the filtrate, and distilled The solvent was removed, recrystallized with acetone, and vacuum-dried to obtain NPQT as a light yellow solid powder.

[0013] Add 50ml of anhydrous ethylene glycol dimethyl ether and 7.5g (0.02mol) NPQT into the three-necked flask, cool down to below 10°C, slowly add 0.22mol60% NaH in several times (wash with anhydrous ether to remove oil), When the bubbles completely disappear, add 0.12mol dibromomethane ethylene glycol dimethyl ether solution, stir at room temperature for 2-3 hours, monitor the reaction process with HPLC, after the reaction is complete...

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Abstract

The present invention relates to a dimeric surfactant (GAP) and its preparation method. Said surfactant is obtained by using ammonium p-nonylphenoxy-2-hydroxypropyltrimethyl chloride (NPQT) as monomer and coupling dimeric NPQT. The measurement of critical micelle concentration (CMC) shows that the CMC value of GAP is two magnitude orders lower than NPQT, so that its surface activity is obviously raised.

Description

technical field [0001] The invention belongs to the technical field of surfactants. It specifically relates to the research on the design and preparation method of gemini surfactants. Background technique [0002] Gemini (Gemini) surfactant means that the molecule contains at least two hydrophilic groups and two hydrophobic groups, and at or near the hydrophilic groups, the linking group (spacer or isolation group) is bound by a chemical bond. A compound formed by bonding two amphiphiles. In the Gemini surfactant molecule, two (or more) hydrophilic groups are connected through chemical bonds by means of linking groups, so that the two surfactant structural units are closely combined. On the one hand, this structure increases the hydrophobic effect of the hydrocarbon chain, which increases the tendency of the hydrophobic group to escape from the aqueous solution; The interface is more tightly arranged, thereby increasing the surface activity of the surfactant. Compared wi...

Claims

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Application Information

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IPC IPC(8): B01F17/00C09K23/00
Inventor 陈功杨洋黄鹏程
Owner BEIHANG UNIV
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