An Anionic Surfactant on an Anionic Substrate: Monovalent Cation Binding
An Anionic Surfactant on an Anionic Substrate: Monovalent Cation Binding
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DOI：
10.1021/acs.langmuir.7b01837
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发表时间：
2017-08-15
期刊：
影响因子：
3.9
通讯作者：
Clarke, Stuart M.
中科院分区：
文献类型：
--
作者：
Allen, Finian J.;Griffin, Lucy R.;Clarke, Stuart M.
用中子反射法研究了阴离子表面活性剂琥珀酸双（2-乙基己基）酯磺酸铯盐在云母阴离子表面的吸附。报告了显著吸附的证据。吸附是可逆的，并与pH值变化不大。这种意想不到的吸附行为的阴离子表面上的阴离子分子进行了讨论，在最近的模型表面活性剂吸附，如阳离子桥接，吸附已报道与二价离子钙，但以前没有观察到与单价离子。
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.