Article (Scientific journals)
Wetting in ternary mixtures - with and without amphiphiles
Schilling, Tanja; Gompper, G.
2002In Journal of Chemical Physics, 117 (15), p. 7284-7294
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Abstract :
[en] The interfacial wetting behavior of ternary fluid mixtures is investigated, both for systems where all components have isotropic interaction potentials, as well as for systems where one component is an amphiphile. The BEG model and the corresponding two-order-parameter Ginzburg–Landau model are employed for systems without amphiphiles. We calculate the global wetting phase diagram for nonamphiphilic mixtures. In the investigated range of interaction parameters, the wetting transitions are always continuous at three-phase coexistence. The critical behavior is found to be universal in some, nonuniversal in other parts of the phase diagram. For systems with amphiphiles, two additional interaction terms are taken into account. The first models the aggregation of amphiphilic molecules at the air–water interface, the second the formation of amphiphilic bilayers in water. We find that the first term leads to a reduction of the tension of the air–water interface, and favors wetting by the water-rich phase, while the second—bilayer—term leads to a reduction of the tension of the interface between the water-rich and amphiphile-rich phases.
Disciplines :
Physics
Identifiers :
UNILU:UL-ARTICLE-2010-910
Author, co-author :
Schilling, Tanja ;  Institut für Festkörperforschung, Forschungszentrum Jülich, Germany
Gompper, G.;  Institut für Festkörperforschung, Forschungszentrum Jülich, Germany
Language :
English
Title :
Wetting in ternary mixtures - with and without amphiphiles
Publication date :
2002
Journal title :
Journal of Chemical Physics
ISSN :
1089-7690
Publisher :
AMER INST PHYSICS, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Volume :
117
Issue :
15
Pages :
7284-7294
Peer reviewed :
Peer Reviewed verified by ORBi
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