2/28/2023 0 Comments Defintion of emulsionTo obtain stable emulsions, the following conditions should be fulfilled: 1. Nevertheless, the stabilisation mechanism is not fully clear. īasic factors affecting the stability of emulsions stabilised by solid particles are summarised in a number of reviews and monographs. For example, it is possible to prepare very stable multiple emulsions of the w/o/w (water in oil in water) and o/w/o (oil in water in oil) type using two kinds of silica particles with a different degree of hydrophobicity without surfactants. ĭuring the last years, nanoparticles (diameters between about 5 and 30 nm) are used as solid stabilisers. Solid particles (stabilisers of emulsions or as modifiers of different properties) are present in crude-oil and bitumen emulsions, paints, agricultural and pharmaceutical preparations, drilling fluids, food emulsions (water or fat crystals), in waste water, etc.Ī short historical essay of emulsions stabilised by solid particles and a list of substances used as solid stabilisers of emulsions could be found in the book by Clayton and in the work of Yan and Masliyah also. Like surfactant molecules, small solid particles can attach to the water-oil interface even though they are not usually amphiphilic. Emulsions stabilised by solid particles alone are often referred to as Pickering emulsions. It has been known for a long time that small solid particles can be effective emulsifiers like surfactant molecules. Nushtayeva, in Interface Science and Technology, 2004 1 INTRODUCTION
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