[en] We investigate the dynamical behavior of lamellar phases in ternary amphiphilic systems of
water, oil and amphiphile. The interaction between the amphiphilic monolayers is described by the steric interaction due to thermal fluctuations for uncharged, and by electrostatic interactions for charged systems.
The dynamics of the system is determined by the hydrodynamics of the fluid layers. The basic parameters of our model are the viscosities of the two solvents, the average thicknesses of the oil and water layers, and the bending rigidity. The model allows to consider different monolayer interactions across the oil and water layers. Relaxation rates are calculated for arbitrary wave vectors parallel and perpendicular to the average monolayer plane. We find that there is a quite complex crossover behavior from a q2 law for small parallel wave vectors to a q3 law for large q . We discuss the relevance of our result for the interpretation of dynamic light-scattering and neutron-spin-echo experiments for these systems.
Disciplines :
Physics
Identifiers :
UNILU:UL-ARTICLE-2010-911
Author, co-author :
Schilling, Tanja ; Institut für Festkörperforschung, Forschungszentrum Jülich, Germany
Theissen, O.; Institut für Festkörperforschung, Forschungszentrum Jülich / Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Germany
Gompper, G.; Institut für Festkörperforschung, Forschungszentrum Jülich / Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Germany
Language :
English
Title :
Dynamics of the swollen lamellar phase
Publication date :
2001
Journal title :
European Physical Journal E. Soft Matter
ISSN :
1292-895X
Publisher :
SPRINGER-VERLAG, 175 FIFTH AVE, NEW YORK, NY 10010 USA