Abstract
Abstract: The present paper concerns emulsions stabilised by silica nanoparticles with modified surface. Nanoparticles with silanol groups at the surface may stabilise oil-in-water (o/w)) emulsions whereas silica nanoparticles modified with hydrophobic groups stabilise water-in-oil (w/o) emulsions. It has been observed that the nature of the emulsion, o/w or w/o depend on the particle type as well as the oil or water content in the emulsion. The type of the emulsion has been determined by conductivity measurements and drop test.