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Kinetics of Water Vapor Adsorption by Chitosan-based Nanocomposite Films  

Seog, Eun-Ju (Department of Food Science and Engineering, Daegu University)
Zuo, Li (Department of Food Science and Engineering, Daegu University)
Lee, Jun-Ho (Department of Food Science and Engineering, Daegu University)
Rhim, Jong-Whan (Department of Food Engineering, Mokpo National University)
Publication Information
Food Science and Biotechnology / v.17, no.2, 2008 , pp. 330-335 More about this Journal
Abstract
Water vapor adsorption kinetics of 3 different types of chitosan-based films, i.e., control chitosan, chitosan/montmorillionite (Na-MMT), and chitosan/silver-zeolite (Ag-Ion) nanocomposite films, were investigated at temperature range of $10-40^{\circ}C$. In all the films, water vapor is initially adsorbed rapidly and then it comes slowly to reach equilibrium condition. Reasonably good straight lines were obtained with plotting of 1/($m-m_0$) vs. l/t. It was found that water vapor adsorption kinetics of chitosan-based films was accurately described by a simple empirical model and the rate constant of the model followed temperature dependence according to Arrhenius equation. Arrhenius kinetic parameters ($E_a$ and $k_o$) for water vapor adsorption by chitosan-based films showed a kinetic compensation effect between the parameters with the isokinetic temperature of 315.52 K.
Keywords
chitosan; montmorillionite (NA-MMT); silver-zeolite (Ag-Ion); nanocomposite films; water vapor adsorption; kinetics;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
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