Different Types Of Surfactants And Hectorite Particles Co-stable Pickering Emulsion

In this article, the stability and type of emulsions prepared by the cooperation of oil soluble surfactant Span 80 and disk nano-particle laponite or the cationic surfactant CTAB and laponite is described. For the emulsion prepared by the oil soluble surfactant Span 80 and laponite particles, the main research content is as follows:1. The stability and type of the emulsions prepared by different laponite concentrations and different oil soluble surfactant Span80 concentrations are investigated. The combination of oil soluble surfactant and laponite particles achieved good result in preparing emulsion. Only low surfactant concentration is needed to make emulsion which can maintain stable to coalescence for half a year when the laponite concentration reaches a fixed concentration. Moreover, the combination of Span80 and laponite particle can produce O/W(paraffin-in -water) emulsion or W/O/W(water-in-paraffin-in-water) emulsions, although Span80 tends to prepare W/O emulsion alone.2. The emulsion diameters decrease with increasing surfactant concentration at fixed laponite concentration, and the emulsion type change from simple O/W to multiple W/O/W with increasing surfactant concentration.3. We have measured the emulsion drop diameters at different laponite concentrations at the high surfactant concentration and low surfactant concentration respectively. When the surfactant concentration is low, the diameters decrease as increasing laponite concentration, and then maintain constant as the laponite concentration is high enough to prevent coalescence of emulsions.4. We have investigated the oil fraction where the catastrophic phase inversion occurs at different surfactant concentrations at fixed laponite concentration, which didn't change as the surfactant concentration.5. The effect of the addition of electrolyte on the emulsion type stability and diameters is also investigated both at low and high surfactant concentration...