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3859913 
Journal Article 
Formation of fluorocarbon surfactant reversed micelles in a halosolvent 
Lai, CL; Orear, EA; Harwell, JH 
1996 
Yes 
Journal of Colloid and Interface Science
ISSN: 0021-9797
EISSN: 1095-7103 
183 
1 
166-175 
WOS:A1996VV31400021 
The constitution of reversed micelles of C6F13COOH (perfluoroheptanoic acid, PFHA) in a chlorofluorocarbon medium (1,1,2-trichlorotrifluoroethane, TCFE) was characterized by a number of techniques, including IR, NMR, and UV-vis and fluorescence probes. Dimensions of these reversed micelles were determined by quasielastic light scattering. With increasing concentration of surfactant in TCFE, the estimated diameter of the water pool in the reversed micelles increased, the estimated aggregation number of the reversed micelles increased, and the estimated wt% water increased. These estimates were consistent with the results of the probe studies and Karl Fischer titrations. Adsorption of fluoroacids from this solvent onto alumina showed cooperative interactions between head groups. (C) 1996 Academic Press. Inc. 
reversed micelles; fluorosurfactant; aggregation 
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