Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지

Effect of Drying Methods on Longitudinal Liquid Permeability of Korean Pine

  • Lee, Min-Gyoung (Department of Forest Products, College of Agriculture, Chungnam National University) ;
  • Lu, Jianxiong (Research Institute of Wood Industry, Chinese Academy of Forestry) ;
  • Jiang, Jiali (Research Institute of Wood Industry, Chinese Academy of Forestry) ;
  • Kang, Ho-Yang (Department of Forest Products, College of Agriculture, Chungnam National University)
  • Received : 2008.09.08
  • Accepted : 2008.09.18
  • Published : 2008.09.25
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Abstract

This study was carried to investigate the effects of steaming and four different drying methods on the longitudinal liquid permeability of Korean pine (Pinus koraiensis Sieb.et Zucc.) board. Four drying methods were air drying, conventional kiln drying, microwave-vacuum drying and high temperature drying. Darcy equation was used for calculating the specific permeability of the small sapwood specimens taken from the treated boards while capillary rising method was used for the heartwood specimens. The sapwood specimens were extracted with water and benzene-alcohol solution to examine the mechanism of liquid flow in treated wood. No significant correlation was found between specific permeability and the number of resin canals of the sapwood specimens. Extraction decreased the differences of specific permeabilities of the sapwood specimens between the five treatment methods. The effects of extraction on the longitudinal permeability are different between five treatments. The fluid path in heartwood was observed by dynamic observation method.

Keywords

References

  1. Booker, R. E. 1990. Changes in transverse wood permeability during the drying of Dacrydium cupressinum and Pinus radiata. New Zealand Journal of Forestry science 20(2): 231-244
  2. Booker, R. E. and J. M. Evans. 1994. The effect of drying schedule on the radial permeability of Pinus radiata D.Don. Holz als Roh- und Werkstoff 52: 150-156 https://doi.org/10.1007/BF02615211
  3. Erickson, H. D. and R. J. Crawford. 1959. The effects of several seasoning methods on the permeability of wood to liquids. Amer. Wood Preservers' Assoc. Proc.
  4. Flynn, K. A. 1995. A review of the permeability, fluid flow, and anatomy of spruce (Picea Spp.). Wood and Fiber Science 27(3): 278-284
  5. Iida, I., A. Ikeuchi, and Y. Imamura. 1995. Liquid penetration of precompressed wood III: Effects of moisture content of specimens and ambient temperature while compression on liquid uptake of softwoods and hardwoods. Mokuzai Gakkaishi 41(9): 811-819
  6. Iida I., S. Mori, Y. Nakamura, H. Sakai, and Y. Imamura. 1996. Liquid Penetration of Precompressed Wood V. Effects of cyclic loading, type of impregnated chemicals and annual ring angles on the uptake of water or oily solvents. Mokuzai Gakkaishi 42(6): 581-588
  7. Iida I., C. Takayama, O. Miyagawa, and Y. Imamura. 1992. Liquid penetration of precompressed wood I: Effect of compressive deformation and recovery upon liquid uptake. Mokuzai Gakkaishi 38(3): 233-240
  8. Iida, I., S. Yusuf, U. Watanabe, and Y. Imamura. 2002. Liquid penetration of precompressed wood VII: Combined treatment of precompression and extraction in hot water on the liquid penetration of wood. Journal of Wood Science 48(1): 81-85 https://doi.org/10.1007/BF00766243
  9. Kang, H-Y. and J. Lu. 2005. Comparison of longitudinal liquid permeability of Pinus koraiensis sapwood treated by steaming and various drying methods. Journal of Wood Science and Technology 33(6): 17-24
  10. Kawai A., I. Iida and Y. Ishimaru. 2001. Dynamic behavior of liquid penetration in softwood. Mokuzai Gakkaishi 47(6): 493-500
  11. Kim S-W and H-Y. Kang. 2005. Effect of Heating and Steaming Treatments on Residual Resin Content and Color Change of Radiata Pine Juvenile Wood. J. Korean Wood Science and Technology 33(4): 30-37 (in Korean)
  12. Lu J., Z. Lin, and J. Jiang. 2007. Effect of different drying methods on liquid penetration of Chinese fir plantation wood. Frontiers of Forestry in China 2(2): 222-226 https://doi.org/10.1007/s11461-007-0036-x
  13. Matsumura J., R. E. Booker, A. Donaldson, and B. G. Ridoutt. 1998. Impregnation of radiata pine wood by vacuum treatment: identification of flow paths using fluorescent dye and confocal microscopy. IAWA Journal 19(1): 25-33 https://doi.org/10.1163/22941932-90000649
  14. Matsumura, J, J. Tsutsumi, and O. Kazuyuki. 1995. Effect of ethanol exchange-drying and ethanol treatments after natural-drying on longitudinal gas permeability of softwood. Mokuzai Gakkaishi 41(9): 863-869.
  15. Matsumura, J, J. Tsutsumi, and O. Kazuyuki. 1996. Effect of water storage and methanol extraction on longitudinal gas permeability of karamatsu heartwood. Mokuzai Gakkaishi 42(2): 115-121
  16. Olsson T, M. Megnis, J. Varna, and H. Lindberg. 2001. Study of the transverse liquid flow paths in pine and spruce using scanning electron microscopy. Journal of Wood Science 47(4): 282-288 https://doi.org/10.1007/BF00766714
  17. Simpson, W. T. 1976. Effect of presteaming on moisture gradient of northern red oak during drying. Wood Science 8(4): 272-276
  18. Zhao Y, I. Iida, J. Lu, and H. Yan. 2003. Dynamic observation of liquid penetration into Chinese Fir and Popular. The proceeding of 9th wood science branch symposium of Chinese forestry society: 106-111