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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/190544
- Influence of surfactants on the force between two bubbles
- Manor, Ofer; Chan, Derek Y. C.
- The retardation of the interfacial velocity due to the presence of surface-active species is a key feature that determines the magnitude of the dynamic interaction force between colliding bubbles. Here we derive simple measures to quantify the influence of a surface-active species during a head-on collision between bubbles to be used as guidelines in the design and analysis of emulsion stability and related experiments. These measures are derived from a theoretical model that was found to be consistent with experiment and are shown to characterize the interfacial dynamics without the need to use numerical analysis. It is shown that a surface mobility may change with the geometry of the film between the bubbles for a specific amount of a surface-active species. However, small amounts of surface-active species are sufficient to immobilize the interfaces under most physical conditions as found in earlier studies.
- Publication type
- Journal article
- Langmuir, Vol. 26, no. 2 (Jan 2009), pp. 655-662
- Publication year
- FOR Code(s)
- 0306 Physical Chemistry (Incl. Structural); 0904 Chemical Engineering
- Bubble dynamics; Interfacial energy; Interfaceial velocity; Surface active agents
- American Chemical Society
- Publisher URL
- Copyright © 2009 American Chemical Society.
- Peer reviewed