Interfacial Forces Between a Solid Colloidal Particle and a Liquid


Geoffrey W. Stevens Department of Chemical and Biomolecular Engineering, University of Melbourne

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Coalescence phenomena, emulsion stability, and the role of colloids in stabilizing liquid–liquid emulsions have been the subject of intensive study, yet there is still no satisfactory quantitative theory for the prediction of the rate of coalescence of drops at an interface or in an emulsion. Direct measurement of the forces between a liquid interface and another liquid interface or a colloid particle has been a key piece of information that has been missing. This article describes recent advances in the theory and experimental techniques in colloid chemistry that enable the direct measurement of these forces.

This is an important step in the understanding of coalescence and emulsion stability phenomena.