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Viscoelastic emulsion with stable salt-free anionic/cationic surfactant, and preparation method thereof

A surfactant and cation technology, applied in the field of viscoelastic emulsion and its preparation, can solve the problems of thin emulsion, no viscoelasticity, limitation, etc., and achieve the effect of good stability

Active Publication Date: 2015-01-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above studies mainly focus on the investigation of the basic physical and chemical properties of the emulsions stabilized by such surfactants. The emulsions constructed are relatively thin and do not have obvious viscoelasticity, which limits their practical applications.

Method used

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  • Viscoelastic emulsion with stable salt-free anionic/cationic surfactant, and preparation method thereof
  • Viscoelastic emulsion with stable salt-free anionic/cationic surfactant, and preparation method thereof
  • Viscoelastic emulsion with stable salt-free anionic/cationic surfactant, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Prepare Br with a concentration of 0.05-0.2 mol / L - For the quaternary ammonium salt type cationic surfactant aqueous solution of counter ion, adopt the method for anion exchange, will prepare with Br - The aqueous solution of the quaternary ammonium salt type cationic surfactant as the counter ion is exchanged into OH - It is the aqueous solution of quaternary ammonium base type cationic surfactant of counter ion;

[0027] (2) Prepare a standard solution of potassium hydrogen phthalate, use phenolphthalein as an indicator, and calibrate with OH - The exact concentration of the quaternary ammonium base type cationic surfactant aqueous solution as the counter ion, according to the measured concentration to the OH - Adding an equimolar amount of fatty acid into an aqueous solution of a quaternary ammonium base type cationic surfactant as a counter ion, heating and shaking it to completely dissolve it, and then drying the solution to obtain a solid anion / cation pair;...

Embodiment 2

[0030] Embodiment 2: step is the same as embodiment 1, and difference is:, solid surfactant add-on is 0.025g, changes the percentage composition of water. The results of the oscillatory shear are shown in Figure 6 middle.

Embodiment 3

[0031] Embodiment 3: The steps are the same as in Embodiment 1, except that the liquid paraffin is replaced by toluene.

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Abstract

The invention relates to a viscoelastic emulsion with a stable salt-free anionic / cationic surfactant, and a preparation method thereof. The viscoelastic emulsion is prepared by mixing the anionic / cationic surfactant without inorganic salt, organic oil and deionized water; the viscoelastic emulsion comprises the following components: 0.5%-5% of an anionic / cationic surfactant by weight percent, 0.05%-0.2% of deionized water by volume percent and the balance of organic oil, wherein the organic oil is selected from liquefied petrolatum, cyclohexane and methylbenzene. The water in oil or oil in water type emulsion is formed by an oil / water system and anion / cation pairs; the prepared mixed system is good in stability, is a uniform phase from a macroscopic view and can be placed without macro-phase separation at room temperature within a certain period of time.

Description

technical field [0001] The invention relates to a viscoelastic emulsion and a preparation method thereof, belonging to the field of new materials. Background technique [0002] Surfactants are widely used and have the reputation of "industrial monosodium glutamate". Human beings have used surfactants for thousands of years. In actual use, it is often necessary to mix two surfactants in order to obtain properties that a single surfactant system does not possess. In recent years, the research on the mixed system of salt-free anion / cation surfactant represented by long-chain alkyltrimethylammonium hydroxide / long-chain fatty acid has aroused people's strong interest. This wonderful combination of surfactants breaks through the thinking limitation that "two surfactants with opposite charges cannot be mixed in aqueous solution". Since the formation of anion / cation pairs greatly reduces the effective cross-sectional area of ​​the hydrophilic group, the surfactant molecules are ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/08
Inventor 郝京诚李洪光张娜陈国君陈坤
Owner SHANDONG UNIV
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