In contrast to the situation for hydrocarbon surfactant The constitution of reversed micelles of C 6 F 13 COOH (perfluoreversed micelles, there is little information on fluorocarbon roheptanoic acid, PFHA) in a chlorofluorocarbon medium (1,1,2reversed micelles (9, 10). Duns et al. (9) have conducted trichlorotrifluoroethane, TCFE) was characterized by a number fluorine-19 nuclear magnetic resonance ( 19 F NMR) experiof techniques, including IR, NMR, and UV-vis and fluorescence ments on a system of perfluorooctanoate reversed micelles. probes. Dimensions of these reversed micelles were determined The a-CF 2 group of perfluorooctanoate is more deshielded by quasielastic light scattering. With increasing concentration of than the terminal v-CF 3 group. D'Angelo et al. (10) have surfactant in TCFE, the estimated diameter of the water pool in studied the reversed micellar system perfluoropolyether the reversed micelles increased, the estimated aggregation number (PFPE) ammonium salt (surfactant)/PFPE oil/water (D 2 O)
of the reversed micelles increased, and the estimated wt% water increased. These estimates were consistent with the results of the with infrared spectroscopy as a sensitive tool for the study probe studies and Karl Fischer titrations. Adsorption of fluoroof water in fluorocarbon reversed micelles. Due to the imporacids from this solvent onto alumina showed cooperative interactance of perfluorochemicals in many applications, the objections between head groups.