Micellization of sodium lauryl sulphate in aqueous sodium malonate solution

The micellization property of sodium lauryl sulphate (SLS) in water in presence of sodium malonate has been investigated conductometrically. The critical aggregation concentration (CAC) and critical saturation concentration (CSC) were determined. The molecular conductance value at infinite dilution for sodium malonate and sodium lauryl sulphate was calculated 225.5 Scm2mol-1 and 81.88 Scm2mol-1 at 298K respectively. The micellization of SLS in presence of sodium malonate in aqueous solution has shown that the formation of aggregates takes place between SLS and ions formed by sodium malonate. With increase in concentration of the surfactant at the saturation point beyond which ionization or dissociation of aggregates takes place justified by the binding capacity. The free energy of micellization has been reported for sodium lauryl sulphate in aqueous sodium malonate solution.

Author(s): Naveen Chandra, Shweta Mishra, Rajendra Joshi, Bhuwan Chandra, Kailash Tamta and Narain D. Kandpal

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