Universität Hamburg, Faculty of Mathematics, Informatics and Natural Sciences, Department Biology, Institute of Wood Science, Wood Physics, Leuschnerstr. 91 c, 21031, Hamburg, Germany.
Wood K plus - Competence Centre for Wood Composites and Wood Chemistry, Altenberger Straße 69, 4040, Linz, Austria.
Sci Rep. 2019 Jul 16;9(1):10309. doi: 10.1038/s41598-019-46381-8.
An investigation of simultaneous dynamic mass and length change measurement for wood is presented. In contrast to the equilibrium in moisture content and swelling and shrinking, where extensive data exists for different wood species, less information is available for the dynamics of moisture changes in direct comparison to the related dimensional changes during the sorption process. This is due to a lack of methods. A gravimetric sorption system, equipped with a high resolution camera and an automated image evaluation, is used to examine simultaneous effects of water vapour sorption dynamics and dimensional change. This method proves a strong correlation between mass and dimensional change, which is in contrast to other investigations. Equilibrium moisture content as well as swelling and shrinking data is in good agreement with literature and manual measurements. The method enables the possibility to determine swelling and shrinking values in-situ without disturbing the targeted climatic conditions. The system is applicable for the investigation of natural wood, modified wood, wood composites or other lignocellulosic materials.
本文提出了一种用于木材的同时动态质量和长度变化测量的研究。与水分含量和膨胀收缩的平衡不同，对于不同的木材种类，已经有大量的数据，但在吸附过程中，与相关的尺寸变化相比，关于水分变化的动力学的信息较少，这是由于缺乏方法。本文使用称重吸附系统，配备高分辨率相机和自动图像评估，研究水蒸气吸附动力学和尺寸变化的同时效应。该方法证明了质量和尺寸变化之间存在很强的相关性，这与其他研究结果形成对比。平衡含水量以及膨胀和收缩数据与文献和手动测量值吻合良好。该方法可以在不干扰目标气候条件的情况下实现原位确定膨胀和收缩值。该系统适用于天然木材、改性木材、木材复合材料或其他木质纤维素材料的研究。
