Controlling particle attachment is crucial where powdered solids come into contact with oil and water. Particles are trapped in a deep energy well at the oil-water interface, stabilising emulsions. Here it is shown that adding anionic surfactant causes dramatic changes to the bulk and interfacial structure of silica particle-stabilised oil-in-water emulsions._x000D_
Exposing particle-stabilised drops to surfactant concentrations above the critical micelle concentration enhances the rate and extent of creaming and flocculation. Mixing particle-stabilised emulsions with surfactant solutions causes drop fragmentation. As the surfactant concentration increases, the average drop size decreases and particles are displaced from the interface during the mixing process._x000D_
CITATION:Vashisth, C, Whitby, C, Fornasiero, D and Ralston, J, 2010. Effect of anionic surfactant on silica particle attachment at the oil-water interface, in Proceedings XXV International Mineral Processing Congress (IMPC) 2010, pp 407-416 (The Australasian Institute of Mining and Metallurgy: Melbourne).