COLL 198 |
| JongChoo Lim, Department of Chemical and Biochemical Engineering, Department of Chemical and Biochemical Engineering, Dongguk University, 3Ga-26 Phil-Dong, Chung-Gu, Seoul 100-715, South Korea |
| In this work, the effect of additives such as solvent, cosurfactant and SDS on microemulsion phase behavior and flux removal efficiency in systems containing commercial AEO nonionic surfactant was investigated. The addition of a n-hydrocarbon as a solvent produced a O/W microemulsion phase over a wider ranges of temperatures and cosurfactant to surfactant ratios and also promoted a better flux removal efficiency than terpene hydrocarbon based microemulsion. The same trend was observed with addition of an anionic surfactant, SDS. On the other hand, phase behavior in the surfactant systems with addition of a cosurfactant showed different trends depending on temperature and chain length of an alcohol added. For example, the increase in solubilization capacity of a microemulsion for abietic acid and decrease in interfacial tension were observed with an increase in the chain length of an alcohol used. It was also found that the addition of medium-chain alcohols such as n-hexanol and n-heptanol produced a microemulsion phase over a wide range of temperatures. The results shown with the above additives will be discussed in connection with interfacial tension measurements and cleaning efficiency measured by FT-IR, UV-visible and SEM. |
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Posters: Fundamental Research in Surface and Colloid Chemistry
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |