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Science 14 July 2006:
Vol. 313. no. 5784, p. 144
DOI: 10.1126/science.313.5784.144d
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Emulsions consist of two immiscible liquids that are mixed together, and often the droplets of one component are stabilized by the addition of a surfactant. For small-sized droplets, internal pressure stabilizes the droplets and interactions between droplets are not significant. At large sizes, deformation and hydrodynamic forces dominate, and these forces can be measured by a number of techniques. Dagastine et al. (p. 210) have developed a method to study droplets of intermediate size. Deformation, hydrodynamic drainage, and interaction forces all contribute to the overall behavior of droplet-droplet interactions, and thus current models of emulsion behavior may not be suitable.




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