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Critical micelle concentrations for alkyltrimethylammonium bromides in water from 25 to 160°C

Abstract

Critical micelle concentrations were determined by conductance measurements for decyl-, dodecyl-, tetradecyl- and hexadecyltrimethylammonium bromide in water at 25, 60, 95, 130, and 160°C. The results are discussed in terms of the equilibrium model and the nonlinear Poisson-Boltzmann model for micelle formation. The free energies of transferring a methylene group from water to the oil-like interior of the micelle are found to be −781 at 25°C, −796 at 60°C, −819 at 95°C, −815 at 130°C, and −787 at 160°C cal-mol−1.

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Evans, D.F., Allen, M., Ninham, B.W. et al. Critical micelle concentrations for alkyltrimethylammonium bromides in water from 25 to 160°C. J Solution Chem 13, 87–101 (1984). https://doi.org/10.1007/BF00646042

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Key Words

  • Critical micelle concentrations
  • alkyltrimethylammonium bromides
  • hydrophobic interactions