Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Evaluation of Physical Properties of Korean Pine (Pinus koraiensis Siebold & Zucc.) Lumber Heat-Treated by Superheated Steam

과열증기 열처리 잣나무재의 물성 평가

  • Park, Yong-Gun (Department of Forest Science, College of Agriculture & Life Science, Seoul National University) ;
  • Eom, Chang-Deuk (Division of Wood Engineering, Department of Forest Products, Korea Forest Research Institute) ;
  • Park, Jun-Ho (Department of Forest Science, College of Agriculture & Life Science, Seoul National University) ;
  • Chang, Yoon-Seong (Department of Forest Science, College of Agriculture & Life Science, Seoul National University) ;
  • Kim, Kwang-Mo (Division of Wood Engineering, Department of Forest Products, Korea Forest Research Institute) ;
  • Kang, Chun-Won (Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University) ;
  • Yeo, Hwan-Myeong (Department of Forest Science, College of Agriculture & Life Science, Seoul National University)
  • 박용건 (서울대학교 농업생명과학대학 산림과학부) ;
  • 엄창득 (국립산림과학원 녹색자원이용부 재료공학과) ;
  • 박준호 (서울대학교 농업생명과학대학 산림과학부) ;
  • 장윤성 (서울대학교 농업생명과학대학 산림과학부) ;
  • 김광모 (국립산림과학원 녹색자원이용부 재료공학과) ;
  • 강춘원 (전북대학교 생활과학대학 주거환경학과, 전북대학교 인간생활과학연구소) ;
  • 여환명 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2012.02.21
  • Accepted : 2012.07.12
  • Published : 2012.07.25
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Abstract

In this study, the method for heat treating wood using superheated steam (SHS) was designed and applied. The physical and mechanical properties of Korean Pine (Pinus koraiensis Siebold & Zucc.) lumber heat-treated by SHS at $170^{\circ}C$ and 0.4 MPa for 10 hours were compared with those of non-treated and normal heat-treated wood. The amount of adsorbed water and equilibrium moisture content of the SHS treated wood were lower than non-treated wood. On the other hand the compressive strength parallel to grain and the bending strength of SHS treated wood were higher than those of non-treated wood. The hygroscopicity of SHS treated wood was similar to normal heat treated wood at $220^{\circ}C$. Internal checks that often occur during normal heat treatment were not developed at SHS treatment. Also, SHS treatment are effective in control of internal checks occurrence and resin exudation.

본 연구에서는 과열증기를 이용한 열처리 공정 제어 방법을 설계하고 적용하였다. $170^{\circ}C$, 0.4 MPa 조건의 과열증기에서 약 10시간 동안 열처리한 잣나무 판재의 물리 및 역학적 성질 변화를 무처리재 및 $220^{\circ}C$ 상압조건에서 일반 열처리한 목재와 비교하였다. 과열증기 처리재는 무처리재에 비해서 수분 흡습량 및 평형함수율이 낮아졌으며, 종압축 강도 및 휨 강도가 증가하였다. 흡습성은 일반 열처리재와 비슷하였으며, 일반 열처리 시 발생하기 쉬운 내부 할렬은 발생하지 않았다. 또한 과열증기 처리에 의해서 잣나무 내부에 있는 다량의 송진이 제거되는 효과도 나타내었다.

Keywords

References

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