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Sodium Triflate Decreases Interaggregate Repulsion and Induces Phase Separation in Cationic Micelles

Lima, Filipe S. ; Cuccovia, Iolanda M. ; Buchner, Richard ; Antunes, Filipe E. ; Lindman, Bjorn ; Miguel, Maria G. ; Horinek, Dominik ; Chaimovich, Hernan



Abstract

Dodecyltrimethylammonium triflate (DTATf) micelles possess lower degree of counterion dissocn. (α), lower hydration, and higher packing of monomers than other micelles of similar structure. Addn. of sodium triflate ([NaTf] > 0.05 M) to DTATf solns. promotes phase sepn. This phenomenon is commonly obsd. in oppositely charged surfactant mixts., but it is rare for ionic surfactants and relatively ...

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