Water Vapor Sorption Behavior of Arabinoxylan from Corn Pericarp

Tomoki Yoshida (Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502)
Wahyu Dwianto (Reseach and Development Unit for Biomaterials, Indonesian Institute of Sciences, Bogor 16911)
Yoichi Honda (Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502)
Hiroshi Uyama (Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka, Suita 565-0871, Osaka)
Jun-ichi Azuma (Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka, Suita 565-0871, Osaka)

Wood Research Journal : Journal of Indonesian Wood Research Society
Vol 4, No 1 (2013): Wood Research Journal

The influence of the degree of arabinose substitution in arabinoxylan on its water vapor sorption behavior was investigated by comparing the application of the independent dual sorption model and the Hailwood-Horrobin (H-H) model on corn pericarp arabinoxylans with arabinose/xylose ratios of 0.35, 0.26 and 0.12. Characterization of their sigmoid shaped adsorption isotherms grouped in IUPAC Type II indicates the usefulness of the former model to demonstrate the importance of arabinose substituents in increasing the affinity of corn pericarp arabinoxylan for water molecules. The present results open the future applicability of the independent dual sorption model for characterization of the hydration behavior of other branched polymers.