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Dimerization surfactant wormlike micelle and preparation method thereof

A technology of worm-like micelles and surfactants, which is applied in the field of dimeric surfactant worm-like micelles and its preparation, which can solve the problems of complex molecular structure, difficult to obtain raw materials, and long synthetic routes, and achieve high biodegradability , excellent viscoelastic performance and low cost

Inactive Publication Date: 2018-12-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current worm-like micelles are obtained from high-concentration gemini surfactants, organic salts, metal ions, etc., through intermolecular forces, van der Waals forces, and hydrogen bonds. For reasons such as long, they all have defects such as high cost and low yield. Therefore, it is urgent to find a new type of surfactant worm-like micelles with strong aggregation ability, strong viscoelasticity, low cost, simple preparation method and high yield to make up for it. above defects

Method used

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  • Dimerization surfactant wormlike micelle and preparation method thereof
  • Dimerization surfactant wormlike micelle and preparation method thereof
  • Dimerization surfactant wormlike micelle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1: Preparation of dimeric surfactant worm-like micelles

[0045] Mix 11.8g, 0.2mol (ethanol solution) of trimethylamine and 18.6g, 0.1mol of 1,2-dibromoethane at a ratio of 2:1, and a substitution reaction occurs at 25°C for 3.5 hours to generate N1, N1, N1, N2, N2, N2-hexamethylethane-1,2-diammonium, then sodium oleate 0.1824g, 0.0006mol and the synthesized N1, N1, N1, N2, N2, N2-hexamethylethane Alkane-1,2-diammonium 0.0912g, 0.0003mol mixed according to the ratio of 2:1, then add 1.73g of ultrapure water, through electrostatic attraction at 25°C, to construct sodium oleate and N1, N1, N1, N2, N2 , N2-hexamethylethane-1,2-diammonium type dimeric surfactant worm-like micelles.

[0046] The synthesized N1, N1, N1, N2, N2, N2-hexamethylethane-1,2-diammonium obtained nuclear magnetic resonance 1HNMR spectrum, such as figure 1 .

[0047] according tofigure 1 NMR spectrum analysis, the final product N1, N1, N1, N2, N2, N2-hexamethylethane-1,2-diammonium was disso...

Embodiment 2

[0049] Embodiment 2: the impact of sodium oleate / dimer quaternary ammonium salt concentration on the zero-shear viscosity of surfactant of the present invention

[0050] Prepare 6 groups of samples with concentrations of 2ml in each group. The ratios of sodium oleate concentration to dimer salt concentration in the sample are 300mmol: 150mmol, 250mmol: 125mmol, 200mmol: 100mmol, 150mmol: 75mmol, 100mmol: 50mmol, 50mmol: 25mmol.

[0051] The obtained worm-like micelles were subjected to viscoelasticity measurements, and the results were as follows figure 2 .

[0052] It can be seen from the results that when the concentration of sodium oleate / C2 dimer quaternary ammonium salt type gemini surfactant is 100mM: 50mM, as the shear rate increases, the solution appears shear thinning phenomenon, which is the formation of worm-like micelles. A feature of the system; when the concentration of sodium oleate / C2 dimer salt increases to 300mM: 150mM, the viscosity of the system can rise ...

Embodiment 3

[0055] Embodiment 3: The effect of dimer salt connection length on the aggregation ability / viscoelastic properties / zero shear viscosity of the surfactant of the present invention

[0056] Trimethylamine 11.8g, 0.2mol (ethanol solution) was mixed with 1,4-dibromobutane 18.7g, 0.1mol, 1,6-dibromohexane 18.8g, 0.1mol, 1,8-dibromooctane 18.9g, 0.1mol were mixed according to the ratio of 2:1, substitution reaction occurred at 25°C, reacted for 3.5h, and N1, N1, N1, N2, N2, N2-hexamethylethane-1,2-diammonium, N1, N1, N1, N4, N4, N4-hexamethylbutane-1,4-diamine, N1, N1, N1, N6, N6, N6-hexamethylhexane-1,6-diamine, N1, N1, N1, N8, N8, N8-hexamethyloctane-1,8-diammonium;

[0057] Then 0.1824g, 0.0006mol of sodium oleate and the synthesized N1, N1, N1, N2, N2, N2-hexamethylethane-1,2-diammonium 0.0912g, 0.0003mol, N1, N1, N1, N4 , N4, N4-hexamethylbutane-1,4-diamine 0.0922g, 0.0003mol, N1, N1, N1, N6, N6, N6-hexamethylhexane-1,6-diamine 0.0942g, 0.0003mol, N1, N1, N1, N8, N8, N8-hexa...

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Abstract

The invention discloses a dimerization surfactant wormlike micelle and a preparation method thereof, belonging to the technical field of chemical synthesis. The method disclosed by the invention comprises the steps: mixing trimethylamine with 1,2-dibromoethane in a certain proportion to generate substitution reaction to obtain N1, N1, N2, N2, N2-hexamethylethane-1,2-diammonium, then mixing sodiumoleate with obtained N1, N1, N2, N2, N2-hexamethylethane-1,2-diammonium in a certain proportion to react to obtain the dimerization surfactant wormlike micelle disclosed by the invention. Such the dimerization surfactant wormlike micelle obtained by the invention has the advantages of strong aggregation capability, excellent viscoelasticity property, low cost, simple preparation method and the like, and has extremely high application prospect in the aspects of environmental protection, oilfield exploitation, textile printing and dyeing, industrial washing and chemicals preparation.

Description

technical field [0001] The invention relates to a dimeric surfactant worm-like micelle and a preparation method thereof, belonging to the technical field of chemical synthesis. Background technique [0002] Surfactants are a class of substances that can significantly reduce the surface tension of a solution and form ordered molecular aggregates in the bulk phase when added in a very small amount, and are composed of hydrophobic groups and hydrophilic groups. It has amphiphilic properties, can not only be adsorbed on the interface, but also can form ordered aggregates in a certain concentration of solution, so it has the properties of wetting, emulsifying, solubilizing, washing, and dispersing. [0003] Surfactants can self-organize in solution to form ordered aggregates of various molecules, such as spherical micelles, rod micelles, worm micelles, vesicles and liquid crystals, etc. Among them, the worm micelles will entangle with each other as the concentration increases, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/18C07C209/00C07C211/63C07C51/41C07C57/12C09K23/18
CPCC07C51/412C07C209/00C07C209/60C09K23/00
Inventor 裴晓梅李朝旺宋冰蕾崔正刚
Owner JIANGNAN UNIV
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