OSMOTIC-PRESSURE AND SALT EXCLUSION IN ELECTROSTATICALLY SWOLLEN LAMELLAR PHASES

被引：138

作者：

DUBOIS, M ^{[1
]}

ZEMB, T ^{[1
]}

BELLONI, L ^{[1
]}

DELVILLE, A ^{[1
]}

LEVITZ, P ^{[1
]}

SETTON, R ^{[1
]}

机构：

[1] CNRS,CTR RECH MATIERE DIV,F-45071 ORLEANS 02,FRANCE

来源：

JOURNAL OF CHEMICAL PHYSICS | 1992年 / 96卷 / 03期

关键词：

D O I：

10.1063/1.462078

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Measurements of osmotic pressure, mainly of electrostatic origin, are reported in the diluted regime of charged bilayers. The interlamellar distances (100-1000 angstrom) are measured using small-angle neutron scattering. The electrostatic repulsive pressure is evaluated within the framework of the Poisson-Boltzmann model, taking into account the conditions of ionic conservation and electrochemical equilibrium, and checked by Monte Carlo simulations in the grand canonical ensemble. The predicted phenomenon of salt ejection from the bilayers is evidenced by direct chemical analysis. Implications concerning the phase behavior of double-tailed surfactants are discussed.

引用

页码：2278 / 2286

页数：9

共 51 条

[1] GRAND CANONICAL ENSEMBLE MONTE-CARLO FOR A LENNARD-JONES FLUID [J].