Abstract
The peculiar nature of temperature-induced vesicle aggregation (TIVA) in some catanionic surfactant systems is systematically investigated. On the basis of a general analysis of the intervesicular interactions, the main driving force for this phenomenon is considered to be the intervesicular hydrophobic interaction among the exposed hydrophobic part of the surfactant headgroups. The addition of an oppositely charged hydrophobic salt to the catanionic vesicle systems is also found to promote the occurrence of TIVA. In fact, TIVA can be induced in ordinary catanionic vesicle systems by the addition of an oppositely charged hydrophobic counterion.
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