Abstract
Sound velocity and density measurements of aqueous solutions of the anionic surfactant SDS (sodium dodecyl sulfate) and the cationic surfactant CTAB (cetyltrimethylammonium bromide) with the drug furosemide (0.002 and 0.02 mol⋅dm−3) have been carried out in the temperature range 20–40 °C. From these measurements, the compressibility coefficient (β), apparent molar volume (φ v ) and apparent molar compressibility (φ κ ) have been computed. From electrical conductivity measurements, the critical micelle concentrations (CMCs) of SDS and CTAB has been determined in the above aqueous furosemide solutions. From the CMC values as a function of temperature, various thermodynamic parameters have been evaluated: the standard enthalpy change (\(\Delta H_{\mathrm{m}}^{\mathrm{o}}\)), standard entropy change (\(\Delta S_{\mathrm{m}}^{\mathrm{o}}\)), and standard Gibbs energy change (\(\Delta G_{\mathrm{m}}^{\mathrm{o}}\)) for micellization. This work also included viscosity studies of aqueous solutions of SDS and CTAB with the drug in order to determine the relative viscosity (η r). UV-Vis studies have also been carried for the ternary drug/surfactant/water system having SDS in the concentration range 0.002–0.014 mol⋅dm−3. All of these parameters are discussed in terms of drug–drug, drug–solvent and drug–surfactant interactions resulting from of various electrostatic and hydrophobic interactions.
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Chauhan, S., Chauhan, M.S., Kaushal, D. et al. Study of Micellar Behavior of SDS and CTAB in Aqueous Media Containing Furosemide—A Cardiovascular Drug. J Solution Chem 39, 622–638 (2010). https://doi.org/10.1007/s10953-010-9534-9
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DOI: https://doi.org/10.1007/s10953-010-9534-9