Rheophysics of Lamellar Phases
نویسندگان
چکیده
منابع مشابه
Interfaces and Grain Boundaries of Lamellar Phases
Interfaces between lamellar and disordered phases, and grain boundaries within lamellar phases, are investigated employing a simple Landau free energy functional. The former are examined using analytic, approximate methods in the weak segregation limit, leading to density profiles which can extend over many wavelengths of the lamellar phase. The latter are studied numerically and exactly. We fi...
متن کاملSurface relaxation of lyotropic lamellar phases
– We study the relaxation modes of an interface between a lyotropic lamellar phase and a gas or a simple liquid. The relaxation is found to be qualitatively different from those of both simple liquids and single-component smectic-A liquid crystals. It is governed by a non-inertial, diffusive mode whose decay rate increases quadratically with wavenumber, |ω| = Aq. The coefficient A depends on th...
متن کاملBoltzmann simulations of lamellar and droplet phases
Lattice Boltzmann simulations are used to investigate spinodal decomposition in a two-dimensional binary fluid with equilibrium lamellar and droplet phases. We emphasise the importance of hydrodynamic flow to the phase separation kinetics. For mixtures slightly asymmetric in composition the fluid phase separates into bulk and lamellar phases with the lamellae forming distinctive spiral structur...
متن کاملMelting of lamellar phases in temperature sensitive colloid-polymer suspensions.
We prepare a novel suspension composed of rodlike fd virus and thermosensitive polymer poly(N-isopropylacrylamide) whose phase diagram is temperature and concentration dependent. The system exhibits a rich variety of stable and metastable phases, and provides a unique opportunity to directly observe melting of lamellar phases and single lamellae. Typically, lamellar phases swell with increasing...
متن کاملAtomic force microscopy images of lyotropic lamellar phases.
For the very first time, atomic force microscope images of lamellar phases were observed combined with a freeze fracture technique that does not involve the use of replicas. Samples are rapidly frozen, fractured, and scanned directly with atomic force microscopy, at liquid nitrogen temperature and in high vacuum. This procedure can be used to investigate micro-structured liquids. The lamellar p...
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ژورنال
عنوان ژورنال: Revue de l'Institut Français du Pétrole
سال: 1997
ISSN: 0020-2274
DOI: 10.2516/ogst:1997013