The Effect of Adding Organic Solvents on the Phase Behavior in Water/Surfactant/scCO₂ Microemulsion in Supercritical State

Abstract:

Water/CO2 (W/C) microemulsion was formed by sodium salt of bis(2,2,3,3,4,4,5,5-octa fluoro-1-pentyl)-2-sulfosuccinate and the phase behavior of this emulsion was investigated in supercritical state. In addition, the change of the phase behavior of W/C microemulsion was observed when various organic solvents were added into this microemulsion. The added organic solvents are isopropanol, n-propanol, ethanol, methanol, pyridine, 2-methoxyethanol, tetrahydrofuran, acetonitrile, acetone, and 1,4-dioxane. According to the results, the phase behavior of W/C microemulsion depended on the temperature and pressure and the microemulsion was thermodynamically stable in the special range of pressure. In case of W/C microemulsion with organic solvents, the phase behavior of this system was affected by the solubility parameter of organic solvents.

• Periodical: Key Engineering Materials (Volumes 277-279)
• Pages: 886-892
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.277-279.886
• Online since: January 2005
• Authors: Ji Young Park, Chang Ha Lee, K.P. Yoo, Jong Sung Lim
• Keywords: Fluorocarbon-Hydrocarbon Surfactant, Microemulsion, Organic Solvent, Phase Behaviour, Point Cloud, scCo₂, Solubility Parameter

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