6 research outputs found
Modeling Adsorption of Cationic Surfactants at Air/Water Interface without Using the Gibbs Equation
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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
