| 초록 |
Recently, the microemulsion technology has received much attention because it has many advantages such as low overall cost, good adhesion to vertical surfaces, better reagent performance, application to both hydrophilic and hydro-phobic contaminants, low surface tension, and good stability. In our previous work, the fluorinated analogue of AOT(F-AOT), the sodium salt of bis(2,2,3,3,4,4,5,5-octafluoro-1-pentyl)-2-sulfosuccinate(di-HCF4) was synthesized and we investigated the effects of W0(molar ratio of water to surfactant), amount of CO2, and weight percent of surfactant in CO2 on cloud point of water in CO2(w/c) microemulsion using this. In this study, we formed various type of microemulsion composed of F-AOT, sc-CO2, organic solvent such as methanol, ethanol, acetonitrile, pyridine, tetrahydrofuran, and isopropyl alcohol instead of water. Their cloud points were measured with various amount of organic solvents at a constant concentration of surfactant in CO2. The cloud points of microemulsions formed in this work were more positive than that of w/c microemulsion.
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