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    Stability of a Floating Water Droplet on an Oil Surface

    Access Status
    Fulltext not available
    Authors
    Phan, Chi
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Phan, C. 2014. Stability of a Floating Water Droplet on an Oil Surface. Langmuir. 30 (3): pp. 768-773.
    Source Title
    Langmuir
    DOI
    10.1021/la403830k
    ISSN
    0743-7463
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/36120
    Collection
    • Curtin Research Publications
    Abstract

    This article presents a new configuration of a water droplet floating on oil surface. The configuration is characterized by an acute contact angle (i.e., θ2 < π/2). In contrast, the previously identified droplet had an obtuse contact angle, which was easily sunk by a small disturbance. By employing a common surfactant, the new configuration was experimentally verified in a mineral oil with a density similar to that of crude oils. The new droplet is kinetically more stable than the previous configuration and can sustain strong disturbances. The results also highlight the significance of dynamic interfacial adsorption on the stability of the floating droplet.

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