The sponge phase of a mixed surfactant system

被引：18
|
作者：
Maldonado, A.
Ober, R.
Gulik-Krzywicki, T.
Urbach, W.
Langevin, D.
机构：
[1] Univ Sonora, Dept Fis, Hermosillo 83000, Sonora, Mexico
[2] Coll France, Lab Phys Mat Condensee, URA 792, CNRS, F-75231 Paris, France
[3] CNRS, Ctr Genet Mol, F-91198 Gif Sur Yvette, France
[4] Ecole Normale Super, Phys Stat Lab, URA 1302, CNRS, F-75231 Paris, France
[5] Univ Paris 11, Phys Solides Lab, UMR 8502, F-91405 Orsay, France
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2007年 / 308卷 / 02期
关键词：
surfactant; sponge phase; lamellar phase; SAXS; FFEM; electrical conductivity;
D O I：
10.1016/j.jcis.2007.01.012
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：
We study the sponge phase of the mixed non-ionic/ionic surfactant system C(14)DMAO-TTAB-hexanol-brine. Our aim is to determine if this phase exists in this mixed system and if it preserves or changes its structure when the relative amount of the charged surfactant is increased in the mixture. SAXS, FFEM, and conductivity results show that for the same bilayer volume fraction the sponge phase preserves its global structure. We propose a method to determine the geometrical obstruction factor from electrical conductivity measurements in ionic sponge phases. Analysis of lamellar phases in the same system shows that the bilayer thickness increases when the ionic surfactant concentration is increased. (c) 2007 Published by Elsevier Inc.
引用
收藏
页码：485 / 490
页数：6
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