Abstract
Some properties of wood (hinoki:Chamaecyparis obtusa) moisture-conditioned by an adsorption process from a dry state and by two desorption processes (from a water-saturated state and from a state with a moisture content slightly below the fiber saturation point) were investigated. The moisture contents of wood conditioned by the adsorption process and by the desorption process continued to approach to one another for the moisture-conditioning period of over 50 weeks. Accordingly, sorption hysteresis should be regarded as a transitional phenomenon that occurs during the process of approaching the true equilibrium, which requires a long time. The wood conditioned by the desorption process beginning from a water-saturated state showed slightly smaller dimensions than those conditioned by the adsorption process with the same moisture content; however, the wood conditioned by the desorption process from a moisture content below the fiber saturation point showed slightly larger dimensions than those conditioned by the adsorption process. The wood conditioned by the adsorption process from a dry state showed a higher modulus of elasticity and modulus of rupture than did the wood conditioned from a water-saturated state with the same moisture content. The mechanical properties of the wood also varied based on the states at which the desorption process was started. This is a notable characteristic of the relation between the drying condition and the mechanical properties of wood.
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Urquhart AR (1929) The mechanism of the adsorption of water by cotton. J Textile Inst 20:T125–134
Smith SE (1947) The sorption of water vapor by high polymers. J Am Chem Soc 69:646–651
White HJ, Eyring H (1947) The adsorption of water by swelling high polymeric materials. Textile Res J 10:523–553
Stamm AJ (1964) Wood and cellulose science. Ronald Press, New York, pp 145–149
Miyabe H (ed) (1968) In: Japan Society of Polymer Science: hand book of material and moisture [Zairyo to Mizu Handbook] (in Japanese). Kyoritu Shuppan, Tokyo, pp 240–262
Stamm AJ, Woodruff SA (1941) A convenient six-tube vapor sorption apparatus. J Ind Eng Chem 13:836–838
Kelsey KE (1957) The sorption of water vapor by wood. Aust J Appl Sci 8:42–54
Stamm AJ, Loughborough WK (1934) Thermodynamics of the swelling of wood. J Phys Chem 39:121–132
Shimaji K, Sudoh S, Harada H (1976) Wood histology (in Japanese). Morikita Shuppan, Tokyo, p 114
Stamm AJ (1964) Wood and cellulose science. Ronald Press. New York, pp 441–447
Kadita S, Yamada T, Suzuki M (1961) Study on rheological properties of wood. I. Effect of moisture content on the dynamic Young's modulus of wood (in Japanese). Mokuzai Gakkaishi 7:29–33
Ishimaru Y, Minase T (1992) Mechanical properties of wood in various stages of swelling. I. Mechanical and swelling behavior of wood swollen in various organic liquids (in Japanese). Mokuzai Gakkaishi 38:550–555
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Ishimaru, Y., Arai, K., Mizutani, M. et al. Physical and mechanical properties of wood after moisture conditioning. J Wood Sci 47, 185–191 (2001). https://doi.org/10.1007/BF01171220
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DOI: https://doi.org/10.1007/BF01171220