Phase behavior of siloxane-based amphiphiles in supercritical carbon dioxide

Silicone-functional analogs to conventional surfactants have been synthesized, and their phase behavior in carbon dioxide explored at 65°C and room temperature. In agreement with work by other researchers, we have observed that these silicone amphiphiles exhibited UCST type behavior in CO 2, such th...

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Bibliographic Details
Published inThe Journal of supercritical fluids Vol. 18; no. 2; pp. 101 - 110
Main Authors Fink, Ralf, Beckman, Eric J
Format Journal Article
LanguageEnglish
Published Elsevier B.V 10.09.2000
Subjects
Carbon dioxide
Phase behaviour
Silicone
Phase behaviour
Carbon dioxide
Silicone
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Summary:Silicone-functional analogs to conventional surfactants have been synthesized, and their phase behavior in carbon dioxide explored at 65°C and room temperature. In agreement with work by other researchers, we have observed that these silicone amphiphiles exhibited UCST type behavior in CO 2, such that miscibility pressures tend to decrease as the temperature increases. Phase behavior is sensitive to the number and type of the CO 2-phobic groups, moreso than to the molecular wt. of the silicone component.
ISSN:0896-8446
1872-8162
DOI:10.1016/S0896-8446(00)00052-8