Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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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
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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

  1. Dwianto, W., Inoue, M., Norimoto, M. 1997. Fixation of compressive deformation of wood by heat treatment. Journal of The Japan Wood Research Society 43(4): 303-309.
  2. Hillis, W.E. 1984. High temperature and chemical effects on wood stability. Part 1: general considerations. Wood Science and Technology 18: 281-293. https://doi.org/10.1021/es00127a713
  3. Hwang, S.W., Lee, W.H. 2011a. The mechanical properties of heat-compressed Radiata pine (Pinus radiata D.Don) by compression set. Journal of The Korean Wood Science and Technology 39(4): 311-317. https://doi.org/10.5658/WOOD.2011.39.4.311
  4. Hwang, S.W., Lee, W.H. 2011b. Hardness and dimensional stability of Radiata pine (Pinus radiata D.Don) heat-compressed wood : Effect of press temperature & time. Journal of The Korean Wood Science and Technology 39(3): 206-212. https://doi.org/10.5658/WOOD.2011.39.3.206
  5. Hwang, S.W., Lee, W.H. 2011c. The mechanical properties of heat-compressed Radiata pine (Pinus radiata D.Don): Effect of press temperature & time. Journal of The Korean Wood Science and Technology 39(4): 303-310. https://doi.org/10.5658/WOOD.2011.39.4.303
  6. Hwang, S.W., Lee, W.H. 2011d. Change of wood color of Radiata pine (Pinus radiata D.Don) by press temperature and time. Journal of The Korean Wood Science and Technology 39(3): 238-243. https://doi.org/10.5658/WOOD.2011.39.3.238
  7. Hwang, S.W., Cho, B.G., Lee, W.H. 2014. Mechanical properties of thermally compressed domestic softwoods. Journal of The Korean Wood Science and Technology 42(6): 666-674. https://doi.org/10.5658/WOOD.2014.42.6.666
  8. Hwang, S.W., Cho, B.G., Lee, W.H. 2015. Hardness and dimensional stability of thermally compressed domestic Korean pine. Journal of The Korean Wood Science and Technology 43(1): 68-75. https://doi.org/10.5658/WOOD.2015.43.1.68
  9. Inoue, M., Norimoto, M., Tanahashi, M., Rowell, R.M. 1993. Steam or heat fixation of compressed wood. Wood and Fiber Science 25(3): 224-235.
  10. Inoue, M., Sekino, N., Morooka, T., Rowell, R.M., Norimoto, M. 2008. Fixation of compressive deformation in wood by pre-steaming. Journal of Tropical Forest Science 20: 273-281.
  11. Jung, S.S., Lee, W.H. 1998. Characteristics of moisture absorption for heat-compressed wood. Journal of The Korea Furniture Society 9(1): 9-16.
  12. Korean Standard Association. 2014. KS F 2204. Method of test for water absorption of wood.
  13. Kubojima, Y., Ohtani, T., Yoshihara, H. 2003. Effect of shear deflection on bending properties of compressed wood. Wood and Fiber Science 36: 210-215.
  14. Laine, K., Belt, T., Rautkari, L., Ramsay, J., Hill, C.A., Hughes, M. 2013a. Measuring the thickness swelling and set-recovery of densified and thermally modified Scots pine solid wood. Journal of Materials Science 48(24): 8530-8538. https://doi.org/10.1007/s10853-013-7671-4
  15. Laine, K., Rautkari, L., Hughes, M., Kutnar, A. 2013b. Reducing the set-recovery of surface densified solid Scots pine wood by hydrothermal post-treatment. European Journal of Wood and Wood Products 71(1): 17-23. https://doi.org/10.1007/s00107-012-0647-2
  16. Morsing, N. 2000. Densification of wood-the influence of hygrothermal treatment on compression of beech perpendicular to the grain. Department of structural engineering and materials, Technical university of Denmark. Series R No 79.
  17. Norimoto, M., Ota, C., Akitsu, H., Yamada, T. 1993. Permanent fixation of bending deformation in wood by heat treatment. Wood Research : bulletin of the Wood Research Institute Kyoto University 79: 23-33.
  18. Park, Y., Eom, C.D., Park, J.H., Chang, Y.S., Kim, K.M., Kang, C., Yeo, H. 2012. Evaluation of physical properties of Korean pine (Pinus koraiensis Siebold & Zucc.) lumber heat-treated by superheated steam. Journal of The Korean Wood Science and Technology 40(4): 257-267. https://doi.org/10.5658/WOOD.2012.40.4.257
  19. Tabarsa, T. 1995. The effects of transverse compression and press temperature on wood response during hot-pressing. M. Sc., thesis, The University of New Brunswick, Canada.

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