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Issue
Korean Journal of Chemical Engineering,
Vol.24, No.1, 165-169, 2007
Examination of the surface properties of kaolinites by inverse gas chromatography: Dispersive properties
Yang YC, Yoon PR
The application of inverse gas chromatography (IGC) for the examination of the surface properties of untreated kaolinite and kaolinites surface-treated with titanate coupling agents is discussed. This paper presents and discusses the dispersive properties expressed by γSD, the dispersive component of the surface free energy, as determined at various temperatures. The γSD values of all the samples were negatively correlated with the temperature of IGC measurement. At the same temperature of IGC measurement, the values of γSD determined by IGC were significantly lower for the surface-treated kaolinites than for the untreated ones. The γSD value of the kaolinite surface-treated with isopropyl triisostearoyl titanate (ITT) at 150 ℃exhibited a surface energy close to that (28.3 mJm.2) of polyethylene with no surface polarity.
Keywords: Inverse Gas Chromatography (IGC); Kaolinite; Dispersive Component of the Surface Free Energy (γSD)
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