The rate at which coalescence occurs is strongly dependent on the structure and dynamics of the interfacial membranes which surround the droplets. As a consequence, the most appropriate method of controlling coalescence is highly dependent on the type of emulsifier used to stabilize the system, as well as the prevailing environmental conditions. Even so, it is possible to give some general advice about the most effective methods of avoiding coalescence. These methods can be conveniently divided into two categories: those which prevent extended close contact and those which prevent membrane disruption.
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