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http://dx.doi.org/10.5012/jkcs.2010.54.4.374

Study on the Solubilizations of Dichlorophenol Isomers by the Cationic Surfactant Solution  

Lee, Nam-Min (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Lee, Byung-Hwan (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Publication Information
Abstract
The interaction of dichlorophenol isomers with the micellar system of TTAB (tetradecyltrimethylammonium bromide) was studied by the UV/Vis spectrophotometric method. The solubilization constants ($K_s$) of dichlorophenol isomers into the micellar system have been measured with the change of temperature and the various thermodynamic parameters have been calculated and analyzed from these changes. The results show that the values of ${\Delta}G^{\circ}_s$ and ${\Delta}H^{\circ}_s$ are all negative within the measured temperature range. The effects of additives (n-butanol and NaCl) on the solubilization of dichlorophenol isomers have been also measured. There was a great change on the values of $K_s$ and CMC simultaneously with these additives. From these changes we can postulate the solubilization sites of each isomers in the micellar system of TTAB.
Keywords
TTAB; Solubilization constant; Dichlorophenol; Critical micelle Concentration; Isostructural temperature;
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