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http://dx.doi.org/10.5012/jkcs.2011.55.2.163

Effect of N-Methyl Acetamide on the Critical Micelle Concentration of Aqueous Solutions of Some Surfactants  

Alawi, Sadeq M. (Department of Chemistry, University of Bahrain)
Akhter, M. Salim (Department of Chemistry, University of Bahrain)
Publication Information
Journal of the Korean Chemical Society / v.55, no.2, 2011 , pp. 163-168 More about this Journal
Abstract
The variations of molar conductivity of various surfactants such as sodium caprylate, sodium laurate, sodium palmitate, sodium stearate, sodium oleate, sodium dodecyl sulphate, and lithium dodecyl sulphate with concentrations of the surfactants for each of the solutions consisting of mixtures of varying concentrations of N-methyl acetamide in water at constant temperature of $30{\pm}0.2^{\circ}C$ were studied. The critical micelle concentration (CMC) for each surfactant is measured. It is found that the CMC values in mixtures of N-methyl acetamide and water solutions of various surfactants are lower than the CMC values in water, and the driving force for micelle formation correlates with solvophobicity. The surfactant-solvent interactions that drive amphiphilic self-organization in N-methyl acetamide in water are discussed. Thermodynamic parameters were evaluated for micellar system to explain the results.
Keywords
N-methyl acetamide; Conductivity; Critical micelle concentration; Hydrophobic interactions; Micelle;
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