Wood Science and Technology

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Nondestructive detection of cracks near the surface of wooden boards by dynamic heat dissipation
Wood Science and Technology - Tập 48 - Trang 773-786 - 2014
Minoru Aoyagi, Takefumi Hiraguri, Takahiro Ueno
A method to detect cracks near the surface of wooden boards has been developed where the change in surface temperature of the wood sample is monitored using an infrared camera following momentary heating by a flash. Cylindrical holes simulating cracks were drilled into the wood samples, and blackbody paint was painted onto the surface of the samples to assist flash absorption. This method uses the...... hiện toàn bộ
Wettability of Sitka spruce timber stored in a Scottish sawmill yard
Wood Science and Technology - Tập 35 - Trang 107-115 - 2001
C. J. Payne, S. Woodward, J. A. Petty
Kiln-dried and air-dried Sitka spruce battens were exposed to outdoor weathering within stickered, close packed and wrapped packs and at the upper surface of these packs. A four-week exposure period was used in James Jones and Sons Ltd. sawmill yard near Aboyne, NE Scotland. The wettability of batten samples removed from the packs of timber was determined by a drop contact angle method using a vi...... hiện toàn bộ
Assessment of the effectiveness of liquid hot water and steam explosion pretreatments of fast-growing poplar (Populus trichocarpa) wood
Wood Science and Technology - Tập 56 - Trang 87-109 - 2021
Andrzej Antczak, Jan Szadkowski, Dominika Szadkowska, Janusz Zawadzki
In this paper, the influence of physicochemical pretreatment methods on the chemical composition, enzymatic hydrolysis efficiency and porosity of fast-growing Populus trichocarpa wood was compared. Among the pretreatment methods, the liquid hot water (LHW) and steam explosion (SE) were used, which were performed at three different temperatures (160 °C, 175 °C and 190 °C) and two residence times (1...... hiện toàn bộ
Chemical aspects of wood modification by sol–gel-derived silica
Wood Science and Technology - Tập 47 - Trang 83-104 - 2012
Brita Unger, Michael Bücker, Stefan Reinsch, Thomas Hübert
It has been shown that tetraethoxysilane-derived precursors are suitable solutions for impregnating pine sapwood to improve its dimensional stability. Tailored sol–gel syntheses result in precursors with nano-scaled silica species which are able to penetrate into the cell walls of wood. The physical fixation of those species inside the cell walls was verified by ESEM/EDX investigations. There is e...... hiện toàn bộ
Automated image processing for quantification of blue-stain discolouration of Norway spruce wood
Wood Science and Technology - Tập 45 - Trang 331-337 - 2010
M. Schubert, S. Mourad, F. W. M. R. Schwarze
Bioincising is a promising method for enhancing liquid uptake (e.g. preservatives or wood-modification agents) in refractory wood. Incubation with the white-rot fungus, Physisporinus vitreus, which selectively degrades pit membranes, results in deeper and more homogeneous penetration of liquids. Conventional methods of assessing the degree of fungal discolouration of wood after treatment with pres...... hiện toàn bộ
Lattice Boltzmann simulations of diffusion through native and steam-exploded softwood bordered pits
Wood Science and Technology - - 2017
Patric Kvist, Adam Therning, Tobias Gebäck, Anders Rasmuson
The relationship between full penetration uptake and swelling of different fluids
Wood Science and Technology - Tập 35 - Trang 217-227 - 2001
P. O'Leary, P. A. Hodges
A test method was developed to calculate the amount of fluid needed to achieve full penetration in Pinus sylvestris sapwood samples. The samples were treated using a vacuum schedule with a range of solvents with varying swelling capabilities. The solvents were xylene, methanol, water and three intermediate binary solutions. It was found that there was a linear relationship between full penetratio...... hiện toàn bộ
Interaction of lignin and hemicelluloses in hydrolysate and with stainless steel surface
Wood Science and Technology - Tập 56 - Trang 793-812 - 2022
Haosong Zhao, Weijue Gao, Pedram Fatehi
Autohydrolysis is vastly used in industry to extract hemicellulose from lignocellulosic biomass. Despite their potential end-use applications, lignocelluloses cannot be completely extracted from hydrolysate as they may deposit on the equipment during the hydrolysis process. This study tends to investigate the physicochemical properties and adsorption behavior of the components of hydrolysates prod...... hiện toàn bộ
Các phép đo thực nghiệm về sự truyền nhiệt và khối lượng trong quá trình sấy đối lưu gỗ thông miền Nam Dịch bởi AI
Wood Science and Technology - Tập 18 - Trang 187-204 - 1984
O. A. Plumb, C. A. Brown, B. A. Olmstead
Việc vận chuyển nhiệt và độ ẩm trong quá trình sấy đối lưu gỗ thông miền Nam đã được khảo sát thực nghiệm. Phân bố độ ẩm trong các mẫu gỗ đã được đo bằng phương pháp giảm gamma. Độ chính xác của các phép đo này phụ thuộc vào hàm lượng độ ẩm, với sự không chắc chắn ước tính dao động từ 29,5% tại hàm lượng độ ẩm 10% đến 6,8% tại hàm lượng ẩm 120%. Các phép đo độ ẩm cục bộ cho thấy sự thay đổi lớn ở ...... hiện toàn bộ
#gỗ thông miền Nam #sấy đối lưu #độ ẩm #truyền nhiệt #truyền khối lượng #phân bố độ ẩm #tốc độ sấy
Isolation and characterization of bagasse cellulose nanofibrils by optimized sulfur-free chemical delignification
Wood Science and Technology - Tập 50 - Trang 1071-1088 - 2016
Pejman Heidarian, Tayebeh Behzad, Keikhosro Karimi
Cellulose nanofibril (CNF) was isolated from bagasse using a modified sulfur-free and bio-refinery-based approach. For this purpose, a chemo-mechanical procedure was designed that consisted of depithing, de-waxing, autohydrolyzing, soda-anthraquinone pulping, elemental chlorine-free bleaching, refining, and ultrafine grinding. In order to obtain a high degree of final fibrillation, the most impor...... hiện toàn bộ
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