A DISORDERED LAMELLAR STRUCTURE IN THE ISOTROPIC-PHASE OF A TERNARY DOUBLE-CHAIN SURFACTANT SYSTEM

被引:39
作者
BARNES, IS
DERIAN, PJ
HYDE, ST
NINHAM, BW
ZEMB, TN
机构
[1] AUSTRALIAN NATL UNIV,DEPT APPL MATH,CANBERRA,ACT 2601,AUSTRALIA
[2] CENS,DEPT LASERS & PHYSICOCHIM,F-91191 GIF SUR YVETTE,FRANCE
来源
JOURNAL DE PHYSIQUE | 1990年 / 51卷 / 22期
关键词
D O I
10.1051/jphys:0199000510220260500
中图分类号
学科分类号
摘要
The ≪ anomalous ≫ fluid isotropic phase in the DDAB/tetradecane/water system differs in important ways from microemulsion phases in related systems, and is thus a useful test for models. On the basis of absolute scaled neutron and X-ray scattering data we show here that the microstructure is best characterised as a randomly folded reverse bilayer. All previously reported examples of this structure are restricted to a narrow range of composition and temperature. In this case of a stiff bilayer with low spontaneous interfacial curvature it extends over a large region of the ternary phase diagram at room temperature, the boundaries of which are explained in terms of simple geometric constraints. Other possible microstructures are critically reviewed.
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页码:2605 / 2628
页数:24
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