Tetraethanolammonium counterions in surfactant and classical colloidal systems |
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| Authors: | Masakatsu Ueno Yi-Hua Tsao Joyce B Evans D Fennell Evans |
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| Institution: | (1) Department of Applied Chemistry, Doshisha University, 602 Kyoto, Japan;(2) Department of Chemical Engineering and Materials Science, University of Minnesoto, Minnesoto, USA |
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| Abstract: | Interaction forces between mica surfaces as a function of added tetraethanolammonium bromide, (EtOH)4NBr, were determined using surface forces measurements. Critical micelle concentrations and aggregation numbers were determined for tetraethanolammonium dodecylsulfate, (EtOH)4NDS, using surface tension and fluorescence probe-quencher measurements. The properties of the large hydrophilic counterion (EtOH)4N+ are compared to those of its hydrophobic analogue Pr4N+. |
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| Keywords: | Tetraethanolammonium dodecylsulfate colloidal systems mica surfaces critical micelle concentrations aggregation numbers hydrophobic ions hydrophilic ions |
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