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Official Journal of the Japan Wood Research Society

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Influence of moisture content on the vibrational properties of hematoxylin-impregnated wood

Abstract

The vibrational property of hematoxylinimpregnated wood was investigated from the aspect of moisture content dependence. The specific dynamic Young's modulus (E/γ) and loss tangent (tanδ) of hematoxylin-impregnated wood were determined in the relative humidity (RH) range of 0%–97%, and were compared with those of the untreated and some conventional chemically treated woods. The changes in theE/γ and tanδ of wood with increasing RH were suppressed by acetylation and formaldehyde treatment because of a marked reduction in the hygroscopicity of the wood. Although the hematoxylin impregnation did not significantly affect the hygroscopicity of the wood, its influence onE/γ and tanδ were similar to that of formaldehyde treatment at low RH and of acetylation at medium RH. It was supposed that at low to medium RH hematoxylin restrains the molecular motion of amorphous substances in the cell wall because of its bulkiness and rigidity. On the other hand, at high RH it seems to work as a plasticizer with adsorbed water molecules.

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Correspondence to Eiichi Obataya.

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Obataya, E., Minato, K. & Tomita, B. Influence of moisture content on the vibrational properties of hematoxylin-impregnated wood. J Wood Sci 47, 317–321 (2001). https://doi.org/10.1007/BF00766720

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Key words

  • Vibrational properties
  • Chemical treatment
  • Moisture content