Phase Inversion of Emulsions Containing a Lipophilic Surfactant Induced by Clay Concentration

被引：25

作者：

Zhang, Jingchun ^{[1
]}

Li, Lu ^{[1
]}

Wang, Jun ^{[2
]}

Xu, Jian ^{[1
]}

Sun, Dejun ^{[1
]}

机构：

[1] Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Shandong, Peoples R China

[2] Shandong Prov Key Lab Test Technol Mat Chem Safet, Jinan 250103, Peoples R China

来源：

LANGMUIR | 2013年 / 29卷 / 12期

关键词：

IN-WATER EMULSIONS; PARTICLE-STABILIZED EMULSIONS; OIL-SOLUBLE SURFACTANT; SOLID PARTICLES; SILICA NANOPARTICLES; COLLOIDAL PARTICLES; CACO3; NANOPARTICLES; RHEOLOGY; MIXTURE; ADSORPTION;

D O I：

10.1021/la304642m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Emulsions stabilized by clay particles and sorbitan monooleate (Span 80) were investigated, and an abnormal phase inversion was observed by increasing the concentration of clay particles in the aqueous phase. At a fixed concentration of Span 80 in the oil phase, the emulsions were oil-in-water (o/w) when the concentration of clay particles in the aqueous phase was low. Surprisingly, the emulsion inverted to water-in-oil (w/o) when the concentration of the hydrophilic clay particles was increased. On the basis of the results of rheological measurements and laser-induced fluorescent confocal microscopy observation, we suggest that this phase inversion is induced by the gel structures formed at high concentration of clay particles. The effects of clay concentration on the stability and the droplet size of these emulsions were also investigated.

引用

页码：3889 / 3894

页数：6

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