Volume 36, Number 2, October II 1996
|Page(s)||117 - 122|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
The lamellar-to-isotropic transition in ternary amphiphilic systems
Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Kantstr. 55, 14513
2 Sektion Physik der Ludwig-Maximilians-Universität München, Theresienstr. 37, 80333 München, Germany
Accepted: 29 August 1996
We study the dependence of the phase behavior of ternary amphiphilic systems on composition and temperature. Our analysis is based on a curvature elastic model of the amphiphile film with sufficiently large spontaneous curvature c0 and saddle-splay modulus sufficiently negative that the stable phases are the lamellar phase and a droplet microemulsion. In addition to the curvature energy, we consider the contributions to the free energy of the long-ranged van der Waals interaction and of the undulation modes. We find that for bending rigidities of order , the lamellar phase extends further and further into the water apex of the phase diagram as the phase inversion temperature is approached, in good agreement with experimental results.
PACS: 64.70.Ja – Liquid-liquid transitions / 64.75.+g – Solubility, segregation, and mixing / 82.70.-y – Disperse systems
© EDP Sciences, 1996
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.