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23 results on '"Mucic, N."'

5. Interfacial Dynamics Methods

Author

Javadi, A., Mucic, N., Karbaschi, M., Won, J. Y., Fainerman, V. B., Sharipova, A., Aksenenko, E. V., Kovalchuk, V. I., Kovalchuk, Nina M., Makievski, A. V., Krägel, J., Miller, R., and Tadros, Tharwat, editor

Published
2013
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18. Interfacial Properties of Tridecyl Dimethyl Phosphine Oxide Adsorbed at the Surface of a Solution Drop in Hexane Saturated Air

Author

B. Fainerman, V., V. Aksenenko, E., V. Makievski, A., Liggieri, L., Mucic, N., (0000-0002-9881-7304) Javadi, A., I. Kovalchuk, V., Miller, R., B. Fainerman, V., V. Aksenenko, E., V. Makievski, A., Liggieri, L., Mucic, N., (0000-0002-9881-7304) Javadi, A., I. Kovalchuk, V., and Miller, R.

Abstract

The surface tension of C13DMPO aqueous solution drops in hexane vapor is studied using the drop profile method. The hexane was injected into the measuring cell at three different conditions: before the formation of the solution drop, at a certain moment during the adsorption process, and after reaching the equilibrium of surfactant adsorption. The surface tension values for all experiments at the same concentration and different injection situations ultimately coincide with each other after attaining the final equilibration stage. The equilibrium surface tension isotherms of C13DMPO solutions, and the adsorption of both components—surfactant and hexane—were calculated. It was shown that the presence of surfactant leads to an increased hexane adsorption.

Published
2020

22. Adsorption of Alkyltrimethylammonium Bromides at Water/AlkaneInterfaces: Competitive Adsorption of Alkanes and Surfactants.

Author

Fainerman, V. B., Mucic, N., Pradines, V., Aksenenko, E. V., and Miller, R.

Subjects
*ADSORPTION (Chemistry), *TRIMETHYL ammonium compounds, *SEPARATION (Technology), *BROMIDES, *ALKANES, *BROMINE compounds
Abstract

Theadsorption of members of the homologous series of alkyl trimethylammoniumbromides (CnTAB) is studied at water/alkaneinterfaces by drop profile analysis tensiometry. The results are discussedin terms of a competitive adsorption process of alkane and surfactantmolecules. A thermodynamic model, derived originally for the adsorptionof surfactant mixtures, is adapted such that it describes a competitiveadsorption of the surfactant molecules from the aqueous phase andalkane molecules from the oil phase. This new model involves the interspeciesattraction coefficient, which mutually increases the adsorption activitiesof the alkane and CnTAB. The effects ofthe alkyl chain length nof CnTABs and the influence of the number of C atoms in the alkanechain are discussed, and the physical quantities are compared to thosedetermined at the aqueous solution/air interface. The new theoreticalmodel for aqueous solution/oil interfaces is also compared to a theorythat does not consider the adsorption of alkane. The proposed newmodel demonstrates good agreement with the experimental data. [ABSTRACT FROM AUTHOR]

Published
2013
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23. Adsorption of equimolar aqueous sodium dodecyl sulphate/dodecyl trimethylammonium bromide mixtures at solution/air and solution/oil interfaces

Author

H. Fauser, N. Mucic, V. Ulaganathan, G. Gochev, Aliyar Javadi, Eugene V. Aksenenko, Reinhard Miller, J. Y. Won, Jürgen Krägel, Mucic, N, Gochev, G, Won, JY, Ulaganathan, V, Fauser, H, Javadi, A, Aksenenko, EV, Kragel, J, and Miller, R

Subjects
thermodynamic model, Aqueous solution, cationic–anionic complexes, Polymers and Plastics, Chemistry, Physical, Inorganic chemistry, Polymer Science, Partition coefficient, Hexane, Surface tension, chemistry.chemical_compound, Chemistry, Colloid and Surface Chemistry, Adsorption, chemistry, Pulmonary surfactant, drop profile analysis tensiometry, Bromide, solution/air interface, Materials Chemistry, Physical and Theoretical Chemistry, Solubility, adsorption of surfactant mixtures, dynamic interfacial tension, solution/hexane interface
Abstract

Two oppositely charged surfactants in an aqueous solution interact with each other via electrostatic interactions and produce surfactant complexes-catanionics. However, their quantitative influence on the interfacial tension at the solution/air and solution/oil interfaces is still unknown. We have measured the interfacial tension of sodium dodecyl sulphate (SDS) and dodecyltrimethylammonium bromide (DoTAB) aqueous mixtures using the du Nouy ring tensiometer and drop profile analysis tensiometry (PAT-1). For the oil phase, we used hexane. The obtained kinetic and equilibrium experimental results were fitted with the common theoretical Frumkin adsorption model. We found that SDS + DoTAB complexes show much higher surface activity than the single surfactants. At solution/air and solution/oil interfaces, SDS and DoTAB produce ion pairs with low water affinity and relatively low oil solubility. SDS + DoTAB partition coefficient between hexane and water phases is 0.32. Such surfactant complexes with advanced surface characteristics may be beneficial in different industrial branches nowadays. Refereed/Peer-reviewed

Published
2015

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