Statics and kinetics of water vapor sorption of small loblolly pine samples |
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Authors: | Trairat Neimsuwan Siqun Wang Adam M Taylor Timothy G Rials |
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Institution: | (1) Department of Forestry, Wildlife and Fisheries, Tennessee Forest Products Center, The University of Tennessee, 2506 Jacob Drive, Knoxville, TN 37996-4570, USA |
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Abstract: | A better understanding of the sorption behavior of different wood structures could be useful in protecting wood against wood
deterioration and fungal attack. The purpose of this study was to investigate the effect of differences among earlywood, latewood,
and tree ring location within the stem cross-section of loblolly pine (Pinus taeda) on the sorption kinetics and statics of water vapor under ambient conditions. The water vapor sorption of earlywood and
latewood in different tree rings was recorded using a dynamic contact angle analyzer under relative humidity changes from
11 to 89%, as provided by saturated salt solutions. Earlywood had higher sorption rates and diffusion coefficients than latewood,
while outer tree rings had higher sorption rates and diffusion coefficients than inner tree rings. The sorption isotherms
of earlywood, latewood, and different tree ring locations within the stem cross-section were fitted very well by a Hailwood–Horrobin
model. |
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