Browse > Article

Comparison of Longitudinal Liquid Permeability of Pinus koraiensis Sapwood Treated by Steaming and Various Drying Methods  

Kang, Ho-Yang (College of Agriculture, Chungnam National University)
Lu, Jianxiong (Research Institute of Wood Industry, Chinese Academy of Forestry)
Publication Information
Journal of the Korean Wood Science and Technology / v.33, no.6, 2005 , pp. 17-24 More about this Journal
Abstract
Korean pine (Pinus koraiensis Sieb.et Zucc.) boards of 30 mm thickness were treated by steaming and four different drying methods. Small specimens were taken from the sapwoods of the treated boards and their longitudinal liquid permeability was measured according to Darcy's law. The specimens were also extracted with alcohol and aceton solutions to examine the mechanism of liquid flow in wood. It was observed that specific permeability drastically decreases with measurement time, resulting in violation of Darcy's law. It may be due to that air bubbles formed under vacuum block flow paths in resin canals. The average specific permeabilities of non-extracted and extracted specimens are different from one treatment to another. It is supposed that the properties of residual resin in resin canals change depending on the conditions of treatments. Anatomical examination was conducted with a scanning electron microscope.
Keywords
longitudinal liquid permeability; Darcy's law; steaming treatment; air drying; conventional kiln drying; high temperature drying; microwave-vacuum drying;
Citations & Related Records
연도 인용수 순위
  • Reference
1 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   DOI   ScienceOn
2 Comstock, G. L. 1965. Longitudinal permeability of green Eastern hemlock. Forest Products Journal 15(4): 441-449
3 Siau, J. F. 1984. Tranport Process in Wood. Springer-Velag, New York. p74
4 강호양. 2001. 단척 통나무와 제기목의 마이크로웨이브-진공 건조. 목재공학 29(4): 25-32
5 송홍근, 김재광. 1994. 소나무와 잣나무의 잎과 수지에 함유된 정유 성분. 목재공학 22(3): 59-67
6 허종윤, 강호양. 1997. Pressure Bomb법을 이용한 섬유방향 액체투과성 측정. 목재공학 25(3): 66-74
7 황병호, 강하영. 1976. 잣나무송지의 화학적 성상에 관한 연구. 목재공학 4(1): 3
8 Han, J. S. and 황병호. 1988. 잣나무 Diterpene Resin Acid의 분석. 목재공학 16(2): 62
9 Sjoestroem, E. 1981. Wood Chemistry. Academy Press, Inc., New York. p84
10 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. (seen in Comstock(1965))
11 Matsumura, J., R. E. Booker, L. 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   DOI
12 Kelso, W. C., R. D. Gertjejensen, and R. L. Hossfeld. 1963. The effect of air blockage upon the permeability of wood to liquids. Univ. of Minn., Agr. Expt. Sta., Tech. Bul. 242