Micellization of dodecylpyridinium chloride in water-ethanol solutions

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dc.contributor.authorAkbas, Halide
dc.contributor.authorBatigoec, Cigdem
dc.date.accessioned2024-06-12T11:18:40Z
dc.date.available2024-06-12T11:18:40Z
dc.date.issued2008
dc.departmentTrakya Üniversitesien_US
dc.description.abstractMicellar properties of dodecylpyridinium chloride (DPC) were investigated by means of electrical conductometry with emphasis on the influences of cosolvent-water content and temperature. Ethanol was used as a cosolvent. Conductivity measurements gave information about critical micelle concentration and micellar ionization degree of the water-ethanol micellar solutions at different temperatures. In all solvent mixtures, it was observed that the critical micelle concentration of DPC and the degree of the counterion dissociation increase with an increasing concentration of ethanol and increasing temperature. Micellar and thermodynamics data were obtained from the temperature dependence of critical micelle concentrations in various aqueous mixtures of ethanol. In order to explain the effect of the cosolvent, the differences in the Gibbs energies of micellization of DPC between water and binary cosolvent were determined. The standard free energy (Delta G degrees(mic)) of micellization was found to be negative as the concentration of the solvent increases, but it is roughly independent of temperature. Although the enthalpic contribution was found to be larger than the entropic one, in particular at lower temperatures, an entropy-enthalpy compensation effect was observed for all systems. Also, enthalpy (Delta H degrees(mic)) and entropy (Delta S degrees(mic)) of micellization are strongly temperature dependent and decrease with increasing temperature and cosolvent content.en_US
dc.identifier.doi10.1007/s10595-008-2001-2
dc.identifier.endpage133en_US
dc.identifier.issn1061-933X
dc.identifier.issn1608-3067
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-42249085755en_US
dc.identifier.scopusqualityQ4en_US
dc.identifier.startpage127en_US
dc.identifier.urihttps://doi.org/10.1007/s10595-008-2001-2
dc.identifier.urihttps://hdl.handle.net/20.500.14551/24906
dc.identifier.volume70en_US
dc.identifier.wosWOS:000255031700001en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPleiades Publishing Incen_US
dc.relation.ispartofColloid Journalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCritical Micelle Concentrationen_US
dc.subjectSodium Dodecyl-Sulfateen_US
dc.subjectAqueous-Solutionsen_US
dc.subjectBromideen_US
dc.subjectSurfactantsen_US
dc.subjectThermodynamicsen_US
dc.subjectMixturesen_US
dc.titleMicellization of dodecylpyridinium chloride in water-ethanol solutionsen_US
dc.typeArticleen_US

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