Phase behavior of siloxane-based amphiphiles in supercritical carbon dioxide

被引:50
作者
Fink, R [1 ]
Beckman, EJ [1 ]
机构
[1] Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA
关键词
carbon dioxide; silicone; phase behaviour;
D O I
10.1016/S0896-8446(00)00052-8
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
Silicone-functional analogs to conventional surfactants have been synthesized, and their phase behavior in carbon dioxide explored at 65 degrees C and room temperature. In agreement with work by other researchers, we have observed that these silicone amphiphiles exhibited UCST type behavior in CO2, such that miscibility pressures tend to decrease as the temperature increases. Phase behavior is sensitive to the number and type of the CO2-phobic groups, moreso than to the molecular wt. of the silicons component. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:101 / 110
页数:10
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