Charge reversal at the air/water interface as inferred from the thickness of foam films |
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| Authors: | T Kolarov R Yankov N E Esipova D Exerowa Z M Zorin |
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| Institution: | (1) Present address: Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1040 Sofia, Bulgaria;(2) Institute of Physical Chemistry, Russian Academy of Sciences, 1040 Moscow, Russia |
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| Abstract: | Experiments are reported with foam films from aqueous solutions with increasing concentration of a cationic surfactant. A correlation is established between the foam film thickness and the possible variation of diffuse electric layer potential at the air/water interface from a negative value in absence of surfactant to positive values at higher surfactant concentrations. It is concluded that a charge reversal at the air/water interface is expected to occur under increasing concentration of cationic surfactants in aqueous solutions. |
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| Keywords: | Charge reversal air/water interface foam film cationic surfactants diffuse electric layer potential |
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