MICROCALORIMETRIC INVESTIGATION OF THE SOLUBILIZATION OF WATER IN REVERSED MICELLES AND WATER-IN-OIL MICROEMULSIONS

被引：0

作者：

HANDRIKMAN, G ^{[1
]}

DAANE, GJR ^{[1
]}

KERKHOF, FJM ^{[1
]}

VANOS, NM ^{[1
]}

RUPERT, LAM ^{[1
]}

机构：

[1] SHELL INT RES MAATSCHAPPIJ BV,KONINLIJKE SHELL LAB,1003 AA AMSTERDAM,NETHERLANDS

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1992年 / 96卷 / 22期

关键词：

D O I：

暂无

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：

Microcalorimetry has been used to study the solubilization of water in reversed micelles and water-in-oil (w/o) microemulsions. The systems were based on Aerosol OT (AOT) and two isomerically pure sodium alkylarenesulfonates as surfactants. The solubilization of water can be described in terms of hydration of the head group (ca. three H2O molecules per AOT), swelling of the water droplet, and phase separation. All steps are endothermic, indicating that a gain in entropy is the driving force for solubilization. Above 60-degrees-C the hydration energy for AOT is strongly affected by temperature. The swelling of alkylarenesulfonate w/o microemulsions droplets in n-heptane is more endothermic than that of AOT w/o microemulsion droplets in n-heptane, indicating a significant influence of surfactant structure.

引用

页码：9061 / 9068

页数：8

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