Moisture movement and thickness swelling in oriented strandboard, part 1. Analysis using nuclear magnetic resonance microimaging
Moisture movement and thickness swelling in oriented strandboard, part 1. Analysis using nuclear magnetic resonance microimaging
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DOI：
10.1007/s00226-004-0258-0
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发表时间：
2004-10
影响因子：
3.4
通讯作者：
J. V. Houts;Siqun Wang;Huiping Shi;H. Pan;G. Kabalka
中科院分区：
文献类型：
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作者：
J. V. Houts;Siqun Wang;Huiping Shi;H. Pan;G. Kabalka
建立了一种在核磁共振显微成像设备中观察定向刨花板(OSB)和实木小样的吸水特性的方法。该程序允许样本被包围在水中，同时保持在成像线圈内的固定位置，之后可以去除水并立即对样本进行成像。这项技术允许在多次不同的水浸泡后拍摄样本的图像，而不必移除和更换样本，因此很容易保持相同的图像位置。利用这一技术观察了自由水的分布及其随时间的运动。在这种类型的样品中，OSB内部的链间空隙被证明是水分移动的主要途径。研究了OSB固有的各向异性对水分运动的影响，方法是用硅胶密封试件的选定表面，观察预定方向的吸湿情况。
A procedure was developed to observe the water absorption characteristics of small specimens of oriented strandboard (OSB) and solid wood in a nuclear magnetic resonance (NMR) microimaging facility. The procedure allowed a specimen to be surrounded in water while remaining in a fixed position within the imaging coil, after which the water could be removed and the specimen immediately imaged. This technique permitted images of the specimen to be taken after a number of different periods of water soak without having to remove and replace the specimen, thus easily maintaining the same image location. Both the distribution of free water and its movement as a function of time were observed using this technique. Inter-strand voids within OSB were shown to be the main route for moisture movement through a specimen of this type. The influence of the inherent anisotropy of OSB on moisture movement was investigated by sealing selected surfaces of a specimen with silicone to observe moisture absorption in predetermined directions.