Influence of surfactants on the force between two bubbles

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/190544

Title: Influence of surfactants on the force between two bubbles
Author(s): Manor, Ofer; Chan, Derek Y. C.
Abstract: 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
Source: Langmuir, Vol. 26, no. 2 (Jan 2009), pp. 655-662
Publication year: 2009
FOR Code(s): 0306 Physical Chemistry (Incl. Structural); 0904 Chemical Engineering
Keyword(s): Bubble dynamics; Interfacial energy; Interfaceial velocity; Surface active agents
Publisher: American Chemical Society
ISSN: 0743-7463
Publisher URL: http://dx.doi.org/10.1021/la902243q
Peer reviewed