Contact
    Start Publications Modeling Adsorption of Cationic Surfactants at Air/Water ...
    ←  Publication Finder
    Attension

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

    Year: 2013

    Journal: Langmuir, 29, pp 4743-4749, 20130926

    Authors: Chi M. Phan, Thu N. Le, Cuong V. Nguyen, Shin-ichi Yusa

    Organizations: Department of Chemical Engineering, Curtin University, Perth, WA 6845, Australia, Department of Materials Science and Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan

    The Gibbs adsorption equation has beenindispensable in predicting the surfactant adsorption at theinterfaces, with many applications in industrial and naturalprocesses. This study uses a new theoretical framework tomodel surfactant adsorption at the air/water interface withoutthe Gibbs equation. The model was applied to two surfactants,C14TAB and C16TAB, to determine the maximum surfaceexcesses. The obtained values demonstrated a fundamentalchange, which was verified by simulations, in the moleculararrangement at the interface. The new insights, in combinationwith recent discoveries in the field, expose the limitations of applying the Gibbs adsorption equation to cationic surfactants at theair/water interface.