Intercalation of polyfluorinated surfactants into clay minerals and the characterization of the hybrid compounds
Intercalation of polyfluorinated surfactants into clay minerals and the characterization of the hybrid compounds
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DOI：
10.1021/la011297x
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发表时间：
2002-01
期刊：
影响因子：
3.9
通讯作者：
Tatsuto Yui;H. Yoshida;H. Tachibana;D. Tryk;H. Inoue
中科院分区：
文献类型：
--
作者：
Tatsuto Yui;H. Yoshida;H. Tachibana;D. Tryk;H. Inoue
Intercalation of seven types of cationic surfactants, including polyfluorinated surfactants, into a cation-exchangeable clay mineral, saponite, was investigated. All of the surfactants were found to intercalate in amounts exceeding the cation exchange capacity (CEC). This tendency was more evident in the cases of the polyfluorinated surfactants, ((((perfluoroalkanoyl)amino)ethyl)hexadecyl)dimethylammonium bromide (CnF-S, where n indicates the number of carbons in the perfluoroalkyl group, F denotes a fluorinated surfactant, and S denotes a surfactant having a single, long alkyl chain); C3F-S exhibited intercalation up to 4.4 times CEC as a saturated adsorption limit. The saponite interlayer distance increased upon surfactant intercalation and reached a constant value at intercalation levels exceeding CEC. The occupied areas for each surfactant molecule decreased in the order C1F-S > C2F-S > C3F-S among the polyfluorinated surfactants. All of the experimental results, including the saturated intercalation ...
