Thermodynamics of Micellization, Interfacial Behavior and Wettability Alteration of Aqueous Solution of Nonionic Surfactants
- 6 September 2017
- journal article
- Published by Walter de Gruyter GmbH in Tenside Surfactants Detergents
- Vol. 54 (5), 427-436
- https://doi.org/10.3139/113.110514
Abstract
The present work deals with the physiochemical properties of polyoxyethylene sorbitan fatty acid esters (polysorbates), which are commonly known under the trade name Tween. Thermodynamics of micellization and adsorption at air-water interface for these nonionic surfactants solutions have been studied over a broad range of temperature. As the temperature of the surfactant solutions increases, the surface tension decreases whereas the critical micelle concentration (CMC) of each surfactant solution initially decreases and then increases. The free Gibb free energies of the micelle formation Δ G m o $\Delta {\rm{G}}_{\rm{m}}^{\rm{o}}$ , and the surfactant adsorption Δ G ads o $\Delta {\rm{G}}_{{\rm{ads}}}^{\rm{o}}$ , are calculated for the CMC of each surfactant at different temperatures. The surface or expanding pressure (Πcmc), minimum area per molecule (Amin), maximum surface excess (Γmax) are also calculated. The interfacial tension (IFT) between the aqueous surfactant solutions and the crude oil are measured at different concentrations of the surfactants using a spinning drop tensiometer. The contact angles are determined on an oil wet quartz surface to investigate the wettability alteration in the presence of Tween surfactants with varying salinity. FTIR analysis of quartz at dry and oil wet state, crude oil and COBRS (crude oil-brine-rock-surfactant) combinations are performed to identify the associated functional groups and their mutual interactions.
Keywords
This publication has 52 references indexed in Scilit:
- Alcohols Effect on Critic Micelle Concentration of Polysorbate 20 and Cetyl Trimethyl Ammonium Bromine Mixed SolutionsJournal of Surfactants and Detergents, 2013
- Investigation of drop breakage and coalescence in the liquid–liquid system with nonionic surfactants Tween 20 and Tween 80Chemical Engineering Science, 2012
- The adsorption at solution–air interface and volumetric properties of mixtures of cationic and nonionic surfactantsColloids and Surfaces A: Physicochemical and Engineering Aspects, 2007
- Prediction of the critical micelle concentration in a lattice model for amphiphiles using a single-chain mean-field theoryThe Journal of Chemical Physics, 2005
- Importance of Micellar Kinetics in Relation to Technological ProcessesJournal of Colloid and Interface Science, 2002
- Thermodynamics of micellization of a non-ionic surfactant Myrj 45: effect of additivesColloids and Surfaces A: Physicochemical and Engineering Aspects, 1996
- Statistical thermodynamics of adsorption, micellisation and solubilisation in water–oil–surfactant systemsFaraday Discussions, 1996
- Thermodynamics of micellar systems: Comparison of mass action and phase equilibrium models for the calculation of standard Gibbs energies of micelle formationAdvances in Colloid and Interface Science, 1995
- A reappraisal of the role of water in promoting amphiphilic assembly and structurePublished by Cambridge University Press (CUP) ,1989
- Aqueous Solubility of Petroleum as Applied to Its Origin and Primary MigrationAAPG Bulletin, 1976