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Change of Dimensional Stability of Thermally Compressed Korean Pine (Pinus koraiensis Sieb. et Zucc.) Wood by Heat Treatment

잣나무 열압밀화재의 열처리에 의한 치수안정성 변화

  • Cho, Beom-Geun (Department of Wood Science & Technology, College of Agriculture & Life Sciences, Kyungpook National University) ;
  • Hwang, Sung-Wook (Department of Wood Science & Technology, College of Agriculture & Life Sciences, Kyungpook National University) ;
  • Kang, Ho-Yang (Department of Wood Science & Technology, College of Agriculture & Life Sciences, Kyungpook National University) ;
  • Lee, Won-Hee (Department of Wood Science & Technology, College of Agriculture & Life Sciences, Kyungpook National University)
  • 조범근 (경북대학교 농업생명과학대학 임산공학과) ;
  • 황성욱 (경북대학교 농업생명과학대학 임산공학과) ;
  • 강호양 (경북대학교 농업생명과학대학 임산공학과) ;
  • 이원희 (경북대학교 농업생명과학대학 임산공학과)
  • Received : 2015.06.02
  • Accepted : 2015.06.22
  • Published : 2015.07.25

Abstract

This study was carried out to investigate the change of dimensional stability of thermally compressed Korean pine (Pinus koraiensis Sieb. et Zucc.) wood by post heat treatment. Specific gravity of compressed wood was notably increased with thermal compression. In the compression set 50%, compressed Korean pine showed a specific gravity of 0.84. The amount of water absorption and swelling of thermally compressed Korean pine decreased with increasing temperature and time of the heat treatment. Set recovery also decreased with increasing temperature and time of heat treatment. Thermally compressed Korean pine that heat-treated in $120^{\circ}C$ for 24 hours showed a set recovery of 3.8%, whereas non-treated group showed 11.5%. Therefore, it was confirmed that the thermal treatment was a very effective method for the dimensional stability of the heat compressed wood.

국내산 잣나무(Pinus koraiensis Sieb. et Zucc.) 열압밀화재의 치수안정성 확보를 위해 열압밀화 후 열처리를 실시하여 흡수시험을 실시하였다. 잣나무재를 압축세트량 50%로 열압밀화하여 비중 0.84의 고비중재를 얻을 수 있었다. 열처리 온도와 시간이 증가함에 따라 열압밀화재의 흡수성과 팽윤성은 감소하였다. 그리고 열압밀화 후 열처리에 의해 열압밀화재의 치수안정성은 크게 향상되었다. 대조군의 두께 회복률이 11.5%인 반면, $120^{\circ}C$ 온도에서 24시간 열처리 된 그룹의 두께회복도는 3.8%로 나타났다. 열압밀화 후 열처리는 열압밀화재의 치수안정성 확보를 위한 매우 효과적인 방안임을 확인하였다.

Keywords

References

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