An Anionic Surfactant on an Anionic Substrate: Monovalent Cation Binding

作者：Allen Finian J; Griffin Lucy R; Alloway Richard M; Gutfreund Philipp; Lee Seung Yeon; Truscott Chris L; Welbourn Rebecca J L; Wood Mary H; Clarke Stuart M

来源：Langmuir, 2017, 33(32): 7881-7888.

DOI：10.1021/acs.langmuir.7b01837

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.

• 出版日期2017-8-15