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Surface Characterization of Hydrophobically Modified MCC Using Inverse Gas Chromatography  

Lee, Hak-Rae (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University)
Lee, Yong-Min (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University)
Park, Il (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University)
Lee, Jin-Hee (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University)
Cho, Joong-Yeon (Department of Paper Technology)
Han, Sin-Ho (Dept. of Chemical Engineering, Korea Polytechnic University)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.34, no.3, 2002 , pp. 9-16 More about this Journal
Abstract
The adsorption characteristics and surface energetics of hydrophobically modified MCC have been investigated by the inverse gas chromatography technique at infinite dilution. The thermodynamic parameters of adsorption, ΔG, ΔH and ΔS, for n-alkanes were determined at infinite dilution. Heats of adsoption of the n-alkanes increased as the level of hydrophobic modification increased. The hydrophobically modified MCC also showed greater entropy of adsorption indicating restricted mobility of the adsorbed n-alkanes. The acid/base characteristics of the MCC were evaluated using polar probes. As the hydrophobicity of MCC increased, the basisity of the MCC decreased.
Keywords
Surface energetics; inverse gas chromatography; heat of adsorption; entrophy; adid/base characteristics;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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