Investigations of the pore-size distribution of wood in the dry and wet state by means of mercury intrusion porosimetry

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• 作者：Mario Zauer ; Simone Hempel ; Alexander Pfriem…
• 刊名：Wood Science and Technology
• 出版年：2014
• 出版时间：November 2014
• 年：2014
• 卷：48
• 期：6
• 页码：1229-1240
• 全文大小：1,195 KB
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• 作者单位：Mario Zauer (1)
  Simone Hempel (2)
  Alexander Pfriem (3)
  Viktor Mechtcherine (2)
  André Wagenführ (1)
  
  1. Institute of Wood and Paper Technology, Technische Universit?t Dresden, 01062, Dresden, Germany
  2. Institute of Building Materials, Technische Universit?t Dresden, Dresden, Germany
  3. Eberswalde University for Sustainable Development, Eberswalde, Germany
  
• ISSN：1432-5225

文摘

This paper deals with the determination of the pore-size distribution of untreated and thermally modified twin samples of Norway spruce (Picea abies (L.) Karst.) and sycamore maple (Acer pseudoplatanus L.) by means of mercury intrusion porosimetry. The investigations considered oven-dried and at 22?°C and 95?% relative humidity-conditioned samples. A special sample holder and a novel method for evacuation were developed for the measurements. This was necessary both to ensure that samples were positioned at a defined distance and the conditioned samples did not dry in an uncontrolled manner. The results clearly show that the climatic state influences the results. Thermal modification greatly alters the pore-size distribution of spruce. This can be largely attributed to the formation of intercellular spaces in the middle lamella as a result of cell-wall compression due to thermal modification. The alteration of the pore structure of maple due to thermal modification is not as pronounced as that of spruce.