Interfacial effects in solids-stabilized emulsions: effect of surfactant and pH on film tension and particle interaction energy

Abstract In this paper, the effects of surfactant and pH on film tension and particle interaction energy for a layer of hydrophobic particles at an oil/water (O/W) interface are discussed. The surfactant (Aerosol-OT) was found to decrease the film tension, while the effect of pH was more complex. The results of our study are interpreted on the basis of the electrokinetic properties of the system, and potential applications in emulsification and demulsification are discussed.