The lamellar-to-isotropic transition in ternary amphiphilic systems

• Verfasst von: Schwarz, Ulrich S. [VerfasserIn]
• Verfasst von: Swamy, K. [VerfasserIn]
• Verfasst von: Gompper, Gerhard [VerfasserIn]
• Titel: The lamellar-to-isotropic transition in ternary amphiphilic systems
• Verf.angabe: U.S. Schwarz, K. Swamy and G. Gompper
• Fussnoten: Gesehen am 18.12.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 1996
• Band/Heft Quelle: (1996) Artikel-Nummer 9608157, 11 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1566480817

Abstract

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 surfactant film with sufficiently large spontaneous curvature and sufficiently negative saddle-splay modulus 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 k_B T, 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.