Effect of Bolaform Counterions on the Adsorption of Sodium Dodecyl Sulfonate at the Air/Water Interface

作者: Jianxi Zhao , Duoping Yang , Yi You

DOI: 10.1007/S11743-013-1486-9

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摘要: The effect of quaternary ammonium-based bolaform counterions (Bolan-series where n is the number carbon atoms between heads) on adsorption sodium dodecyl sulfonate (SDDS) at air/water interface has been studied using surface tension measurements. results showed that Bolan strongly interacted with SDDS even very low concentrations. This reduced CMC and C 20 in presence counterions. packed more tightly under inducement thus occupied area per surfactant molecule decreased. Another counterion series (Bolanph) a benzene ring attached each side ammonium heads could further enhance interaction SDDS. due to fact aromatic rings penetrate into gaps headgroups, which provide an additional association force besides electrostatic attractions. present suggested approach construct gemini-like surfactants depending attraction conventional ionic or hydrophobic made by rings.

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