Dynamic Behavior in Isotropic Regions of Tetradecylpyridinium Bromide/pentanol/heptane/water System
Self-diffusion coefficients from pulsed-gradient spin-echo NMR are reported for four components of the tetradecylpyridinium bromide-85% heptane 15% pentanol-water pseudoternary system. Measurements were taken throughout the inverted microemulsion region and also in a small isotropic region beyond the domain of lamellar liquid crystals. Boundaries for the smaller isotropic region were also delineated. Observations of the self-diffusion coefficients for water relative to those of the surfactant, oil, and alcohol show several distinct structural transitions within the water-in-oil region of the phase diagram. The smaller isotropic region exhibits a complete inversion of phase relative to the water-in-oil region. Conductivity measurements were used to further clarify the NMR data. © 1990.
P. M. Lindemuth et al., "Dynamic Behavior in Isotropic Regions of Tetradecylpyridinium Bromide/pentanol/heptane/water System," Journal of Colloid And Interface Science, Elsevier, Jan 1990.
The definitive version is available at http://dx.doi.org/10.1016/0021-9797(90)90024-I
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