Thermodynamic and Interfacial Properties of DTABr/CTABr Mixed Surfactant Systems in Ethanolamine/Water Mixtures: A Conductometry Study | Zendy

Olaseni Segun Esan | Zendy; Medinat Olubunmi Osundiya | Zendy; Christopher Olumuyiwa Aboluwoye | Zendy; Olanrewaju Owoyomi | Zendy; Jide Ige | Zendy

Open Access

Thermodynamic and Interfacial Properties of DTABr/CTABr Mixed Surfactant Systems in Ethanolamine/Water Mixtures: A Conductometry Study

Author(s) -

Olaseni Segun Esan,

Medinat Olubunmi Osundiya,

Christopher Olumuyiwa Aboluwoye,

Olanrewaju Owoyomi,

Jide Ige

Publication year - 2013

Publication title -

isrn thermodynamics

Language(s) - English

Resource type - Journals

eISSN - 2090-5211

pISSN - 2090-5203

DOI - 10.1155/2013/280101

Subject(s) - ethanolamine , chemistry , micelle , conductometry , pulmonary surfactant , solvent , bromide , critical micelle concentration , thermodynamics , chromatography , inorganic chemistry , organic chemistry , aqueous solution , biochemistry , physics

Mixed-micelle formation in the binary mixtures of dodecyltrimethylammonium bromide (DTABr) and cetyltrimethylammonium bromide (CTABr) surfactants in water-ethanolamine mixed solvent systems has been studied by conductometric method in the temperature range of 298.1 to 313.1 K at 5 K intervals. It was observed that the presence of ethanolamine forced the formation of mixed micelle to lower total surfactant concentration than in water only. The synergistic interaction was quantitatively investigated using the theoretical models of Clint and Rubingh. The interaction parameter β12 was negative at all the mole fractions of DTABr in the surfactant mixtures indicating a strong synergistic interaction, with the presence of ethanolamine in the solvent system resulting in a more enhanced synergism in micelle formation than in water only. The free energy of micellization values was more negative in water-ethanolamine mixed solvent system than in pure water indicating more spontaneity in mixed micelle formation in the presence of ethanolamine than in pure water.

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