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Micellar Behaviour and Solute-Solvent Interactions of Copper Soaps (derived from treated vegetable oils) in Non-aqueous Solvent

Author(s): M. R. K. Sherwani, Rashmi Sharma and Renu Bhutra

copper soaps prepared from treated oils have been analysed for their micellar characteristics. Mustard and soyabean oils have been treated for 15 and 60 minutes. Densities of copper soap solutions of various concentrations have been measured and using density data, molar volume and apparent molar volumes have been evaluated. These parameters show a change at cmc, which suggests the micellar behaviour of the soaps. The critical micelle concentrations are found to decrease with increase in average molecular weight of the soap. The results of apparent molar volume have been explained on the basis of Masson’s equation. The plots of apparent molar volume against c are characterised by an intersection of two straight lines at the cmc of the soap. It has been observed that the solute-solvent interaction is more pronounced in dilute solutions while in concentrated solutions, solute-solute interaction becomes prominent. The cmc has been further confirmed by viscosity and acoustic parameters.

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  • Geneva Foundation for Medical Education and Research

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