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    Modeling Adsorption of Cationic Surfactants at Air/Water Interface Without Using the Gibbs Equation

    Access Status
    Fulltext not available
    Authors
    Phan, Chi
    Thu, L.
    Yusa, S.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Phan, Chi M. and Thu, Le N. and Yusa, Shin-ichi. 2013. Modeling Adsorption of Cationic Surfactants at Air/Water Interface Without Using the Gibbs Equation. Langmuir. 29: pp. 4743-4749.
    Source Title
    Langmuir
    DOI
    10.1021/la3046302
    ISSN
    0743-7463
    URI
    http://hdl.handle.net/20.500.11937/13698
    Collection
    • Curtin Research Publications
    Abstract

    The Gibbs adsorption equation has been indispensable in predicting the surfactant adsorption at the interfaces, with many applications in industrial and natural processes. This study uses a new theoretical framework to model surfactant adsorption at the air/water interface without the Gibbs equation. The model was applied to two surfactants, C14TAB and C16TAB, to determine the maximum surface excesses. The obtained values demonstrated a fundamental change, which was verified by simulations, in the molecular arrangement at the interface. The new insights, in combination with recent discoveries in the field, expose the limitations of applying the Gibbs adsorption equation to cationic surfactants at the air/water interface.

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