Journal
WOOD SCIENCE AND TECHNOLOGY
Volume 46, Issue 1-3, Pages 563-578Publisher
SPRINGER
DOI: 10.1007/s00226-011-0430-2
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A combined effect of steaming and heat treatment was imposed on green Turkey oak wood, both for sapwood and heartwood. Steaming was carried out in an autoclave at 100-120-130A degrees C whereas heating was carried out in an oven for 2 h at 120-180A degrees C. Equilibrium moisture content at dry, intermediate and moist state both in desorption and adsorption, swelling, cup, twist, color change, and spectral reflectance measures were registered. Swelling and water absorption decreased due to the hydro-thermal treatment. During adsorption, heartwood showed a higher hygroscopic inertia compared to sapwood and this difference increased with temperature. Cup increased with temperature in the steaming process. Twist seemed to be affected more by quality of original trunks than treatments. The wood color was more sensitive at a steaming temperature of 130A degrees C combined with heat treatment at 180A degrees C. Transitional treatments assured more reliable results on homogenization of hue between sapwood and heartwood.
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