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Water vapor sorption kinetics of wood modified with glutaraldehyde
Author(s) -
Xie Yanjun,
Hill Callum A. S.,
Xiao Zefang,
Jalaludin Zaihan,
Militz Holger,
Mai Carsten
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32054
Subject(s) - sorption , kinetics , equilibrium moisture content , glutaraldehyde , water vapor , scots pine , moisture , materials science , water activity , chemistry , chemical engineering , water content , pinus <genus> , polymer chemistry , thermodynamics , adsorption , chromatography , organic chemistry , composite material , botany , physics , geotechnical engineering , quantum mechanics , engineering , biology
The modifying effects of Scots pine ( Pinus sylvestris L.) wood with the crosslinking agent glutaraldehyde (GA) on the water vapor sorption kinetics were studied by curve fitting the experimental isotherm sorption data obtained using a Dynamic Vapor Sorption apparatus using the parallel exponential kinetics model (PEK model) and the Hailwood–Horrobin model (H–H model) for the isotherm. Both the H–H model and the PEK model provided good fits to the experimental data. Modification of wood with GA reduced both the time to equilibrium and the equilibrium moisture content (EMC). According to the PEK and H–H models, the reduction in EMC was mainly due to the decrease of moisture content (MC) associated with the slow sorption processes and polylayer water. The fast sorption processes and monolayer water were little affected by GA modification. Compared to the untreated control, the estimated total water absorbed by wood treated to a WPG of 20.9% at 100% RH decreased by 52.2%, by extrapolating the fitted curves derived from the H–H model. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010