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| Comparison of longitudinal liquid permeability of Pinus koraiensis sapwood treated by steaming and various drying methods |
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| 글쓴이 : 관리자
날짜 : 10-03-09 15:26
조회 : 15480
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증기 및 여러 가지 건조방법으로 처리된 잣나무 변재의 섬유방향 액체투과율 비교
Comparison of longitudinal liquid permeability of Pinus koraiensis sapwood treated by steaming and various drying methods <Mokchae Konghak 33(6):17-24, 2005> Corresponding author hykang@cnu.ac.kr
Korean pine 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 decrease 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 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
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