Anionic Surfactants on Anionic Substrate: Monovalent Cation Binding
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Peer-reviewed
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Abstract
Neutron reflectometry has been used to study the adsorption of the anionic surfactant bis(2-ethylhexyl) sulfosuccinate cesium salt on the anionic surface of mica. Evidence of significant adsorption is reported. The adsorption is reversible and changes little with pH. This unexpected adsorption behavior of an anionic molecule on an anionic surface is discussed in terms of recent models for surfactant adsorption such as cation bridging, where adsorption has been reported with the divalent ion calcium but not previously observed with monovalent ions.
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0306 Physical Chemistry (incl. Structural)
Journal Title
Langmuir
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Journal ISSN
0743-7463
1520-5827
1520-5827
Volume Title
33
Publisher
American Chemical Society
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Sponsorship
Engineering and Physical Sciences Research Council (1799423)
BP P.L.C. are thanked for financial support (RG86209).