Abstract
IT has long been known that a liquid drop at an oil/aqueous interface does not coalesce spontaneously, the drop resting at the interface for some time before coalescing1. This rest time phenomenon is attributed to the presence of a thin film of the surrounding liquid (the continuous phase) trapped between the drop and the interface, as shown in Fig. 1 (refs. 2–4). This film drains radially under the influence of gravitational forces until it is approximately 1–10 µ in thickness, when rupture and subsequent coalescence take place.
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References
Mahajan, L. D., Phil. Mag., 10, 383 (1930).
Gillespie, T., and Rideal, E., Trans. Farad. Soc., 52, 173 (1956).
Charles, G. E., and Mason, S. G., J. Colloid Sci., 15, 105 (1960).
Charles, G. E., and Mason, S. G., J. Colloid Sci., 15, 236 (1960).
Brown, A. H., and Hanson, C., Trans. Farad. Soc., 61, 1754 (1965).
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BROWN, A., HANSON, C. Drop Coalescence in Liquid–Liquid Systems. Nature 214, 76–77 (1967). https://doi.org/10.1038/214076a0
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DOI: https://doi.org/10.1038/214076a0
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