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Method for regulating and controlling quick demulsification and restabilization of emulsion without using surfactant

An emulsion and demulsification technology, applied in chemical instruments and methods, mixing methods, dissolution and other directions, can solve the problems of high cost and large amount of surfactant, and achieve the effect of low cost, wide application and lower use cost.

Active Publication Date: 2021-12-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the surfactant alone stabilizes the emulsion because it needs to cover a whole layer of interfacial film, resulting in a large amount of surfactant and high cost.

Method used

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  • Method for regulating and controlling quick demulsification and restabilization of emulsion without using surfactant
  • Method for regulating and controlling quick demulsification and restabilization of emulsion without using surfactant
  • Method for regulating and controlling quick demulsification and restabilization of emulsion without using surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: n-decane / water emulsion stabilized by nano silicon dioxide particles and n-octylamine composite emulsifier.

[0037] Disperse 0.021g of nano-silica particles (0.3wt.%) in n-octylamine solutions with concentrations of 0.5, 1, 1.5, 2, 3 and 6mmol / L, and add 3mL of n-decylamine at a volume ratio of 1:1 to water. Alkanes were homogenized at 11,000 rpm for 2 minutes using a homogenizer to obtain a stable emulsion.

[0038] like figure 1 As shown, the emulsion cannot be stabilized in the presence of nano-silica particles alone, and the stable emulsion cannot be formed in the presence of n-octylamine alone. The nano-silica particles are dispersed in n-octylamine solution to form a composite emulsifier, and a stable O / W emulsion can be obtained when the n-octylamine concentration is above 0.5mmol / L. And with the increase of n-octylamine concentration, the particle size of the dispersed phase in the emulsion becomes smaller. After standing for six months, the appea...

Embodiment 2

[0039] Example 2: n-decane / water emulsion stabilized by nano-alumina particles and n-octylamine composite emulsifier.

[0040] 0.021g of nano-alumina particles (0.3wt.%) is dispersed in the n-octylamine solution whose concentration is 0.001, 0.003, 0.006, 0.01, 0.03, 0.06, 0.1, 0.3, 0.6, 1, 3 and 6mmol / L, Add 3 mL of n-decane at an oil-water volume ratio of 1:1, and use a homogenizer to homogenize at 11,000 rpm for 2 minutes to obtain a stable emulsion.

[0041] like figure 2 As shown, the emulsion cannot be stabilized in the presence of nano-alumina particles alone, and the stable emulsion cannot be formed in the presence of n-octylamine alone. Disperse the nano-alumina particles into the n-octylamine solution to form a composite emulsifier. When the n-octylamine concentration is above 0.03mmol / L, a stable O / W emulsion can be obtained. And with the increase of n-octylamine concentration, the particle size of the dispersed phase in the emulsion becomes smaller. After stand...

Embodiment 3

[0042] Embodiment 3: the n-decane / water emulsion that nano-silica particles and N, N dimethyl hexadecylamine stabilize

[0043] Prepare the n-decane / water system of 0.3wt.% nano-silica particles and 0.001, 0.01, 0.1, 1 and 10mmol / L N, N dimethyl hexadecylamine, using a homogenizer Homogenize for 2 minutes at 11000 rpm to obtain a stable emulsion.

[0044] like image 3 As shown, the emulsion cannot be stabilized in the presence of nano-silica particles alone, and the stable emulsion cannot be formed in the presence of N,N dimethyl hexadecylamine alone. The emulsifier formed after the two are compounded can prepare a stable O / W emulsion when the concentration of N,N dimethyl hexadecylamine is above 1mmol / L. And with the increase of N,N dimethyl hexadecylamine concentration, the particle size of the dispersed phase in the emulsion becomes smaller. After standing for six months, the appearance of the emulsion remained basically unchanged, indicating that the obtained emulsion ...

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Abstract

The invention discloses a method for regulating and controlling rapid demulsification and restabilization of emulsion without using a surfactant, and belongs to the field of colloid and interface chemistry. An O / W type emulsion is prepared by using a composite emulsifier composed of inorganic nanoparticles and an organic amine compound and not containing any surfactant component; then acid is added into the emulsion for demulsification, and then alkali is added for neutralizing the previously added acid to form a stable emulsion. The process can be circulated for multiple times and can be realized in an aqueous solution. After demulsification, all components of the compound emulsifier enter the water phase, so that the water phase can be used as a carrier of the emulsifier for repeated use. The method for efficiently regulating and controlling the emulsion is low in cost and has important application in the aspects of emulsion polymerization, oil product transportation, catalysis and the like.

Description

technical field [0001] The invention relates to a method for regulating rapid demulsification and restabilization of emulsion without using surfactant, and belongs to the technical field of colloid and interface chemistry. Background technique [0002] An emulsion is a liquid-liquid dispersion system formed by two immiscible liquids, in which the phase existing in the form of droplets is called the dispersed phase, and the other phase is the continuous phase. Emulsions are usually oil-water dispersions, and O / W emulsions and W / O emulsions are common. Emulsions are widely used in many different technical fields, such as cosmetics, food, pharmaceuticals, crude oil transportation, emulsion polymerization, etc. At the same time, the demulsification and restabilization of emulsions are very important in the application of daily life and industrial technology. On the one hand, some emulsions, such as food and cosmetics, need to maintain good stability during application. On the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/08B01F17/00B01F17/16C09K23/00C09K23/16
Inventor 宋冰蕾薛林雨张金朋陈豪
Owner JIANGNAN UNIV
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