ENTROPY-DRIVEN PHASE-SEPARATION IN BINARY EMULSIONS

被引：62

作者：

STEINER, U

MELLER, A

STAVANS, J

机构：

[1] Department of Complex Systems, Weizmann Institute of Science

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.74.4750

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied experimentally phase separation in binary mixtures comprised of nearly monodisperse emulsion droplets of two different sizes. For three values of ξ, where ξ<1 is the size ratio, we have determined phase diagrams and find that segregation occurs for ξ≤0.30±0.02. The phase boundaries are strongly dependent on ξ, and phase-separated samples show nearly complete segregation of the two components, as a result of the osmotic depletion effect which drives the phase segregation. Our results agree qualitatively with recent model calculations. © 1995 The American Physical Society.

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页码：4750 / 4753

页数：4

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