Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Thermal Compression Treatment on the Surface Hardness, Vertical Density Propile and Thickness Swelling of Eucalyptus Wood Boards by Hot-pressing

  • Unsal, Oner (Dept. of Forest Products Engineering, Faculty of Forestry, Istanbul University) ;
  • Candan, Zeki (Dept. of Forest Products Engineering, Faculty of Forestry, Istanbul University) ;
  • Buyuksari, Umit (Dept. of Forest Products Engineering, Faculty of Forestry, Istanbul University) ;
  • Korkut, Suleyman (Dept. of Forest Industrial Engineering, Faculty of Forestry, Duzce University) ;
  • Chang, Yoon-Seong (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Yeo, Hwan-Myeong (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University)
  • Received : 2010.11.12
  • Accepted : 2010.12.22
  • Published : 2011.03.25
Download PDF
⟨ Previous Next ⟩

Abstract

Thermal treatment techniques are used for modifying wood and wood-based materials to improve dimensional stability and hygroscopicity. This study investigated the effects of press pressure and temperature on density, vertical density profile, thickness swelling and surface hardness of eucalyptus wood boards. The experimental wood boards were prepared from Turkish River Gum ($Eucalyptus$ $camaldulensis$ Dehn.). The surface hardness value increased with increasing press pressure in the treated groups. The application of a higher pressure at the same temperature level increased the amount of swelling of wood. It means that it is not needed for application of higher pressure to enhance the dimensional stability of wood. It is expected that it is possible to produce increased hardness, dimensional stability and durability by application of hot pressing treatment. This research showed that different press pressure and temperature values should be used to improve the performance properties of eucalyptus wood so that the end-use of the wood materials could be expanded.

Keywords

References

  1. American Society for Testing and Materials ASTM-D 1037. 1999. Standard Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials. ASTM International. West Conshohocken, PA.
  2. Burmester, A. 1973. Effect of heat-pressure-treatment of semi-dry wood on its dimensional stability. Holz Roh-Werkst 31: 237-243. https://doi.org/10.1007/BF02607268
  3. Candan, Z. 2007. Effects of some production parameters on vertical density profile (VDP) and technological properties of medium density fiberboard (MDF). MS Thesis, Istanbul University. Istanbul. Turkey. p. 400.
  4. Esteves, B., A. V. Marques, I. Domingos, and H. Pereira. 2007. Influence of steam heating on the properties of pine (Pinus pinaster) and eucalypt (Eucalyptus globulus) wood. Wood Science and Technology 41(3): 193-207. https://doi.org/10.1007/s00226-006-0099-0
  5. Giebeler, E. 1983. Dimensional stabilization of wood by moisture-heat-pressure-treatment. Holz Roh-Werkst 41: 87-94. https://doi.org/10.1007/BF02608498
  6. Kamke, F. A. and L. J. Casey. 1988. Fundamentals of flakeboard manufacture: Internal mat conditions. Forest Products Journal 38(6): 38-44.
  7. Militz, H. 2002. Thermal treatment of wood: European processes and their background. In Proceedings of the 33rd Annual Meeting; Cardiff- Wales. 1217 May, 2002: pp. 1-17. IRG/WP 02-40241.
  8. Norimoto, M. 1993. Large compressive deformation in wood. Mokuzai Gakkaishi 39(8): 867- 874.
  9. Norimoto, M. 1994. Heat treatment and steam treatment of wood. Wood Industry 49(12): 588- 592.
  10. Seborg, R. M., M. A. Millett, and A. J. Stamm. 1945. Heat stabilized compressed wood (Staypak). Mech. Eng. 67: 25-31.
  11. Stamm, A. J. 1964. Wood and cellulose science. Ronald Press. New York. USA.
  12. Stamm, A. J. and E. E. Haris. 1953. Chemical processing of wood, Chemical Publishing Co., Inc. New York. USA.
  13. Strickler, M. D. 1959. Effect of press cycle and moisture content on properties of Douglas fir flakeboard. Forest Products Journal 9(7): 203- 215.
  14. Tarkow, H. and R. M. Seborg. 1968. Surface densification of wood. Forest Products Journal 18(9): 104-107.
  15. Unsal, O., S. Korkut, and C. Atik. 2003. The effect of heat treatment on some properties and colour in eucalyptus (Eucalyptus camaldulensis Dehn.) wood. MADERAS: Ciencia Y Tecnologia Journal 5(2): 145-152.
  16. Unsal, O. and N. Ayrilmis. 2005. Variations in compression strength and surface roughness of heat-treated Turkish river red gum (Eucalyptus camaldulensis Dehn.) wood. Journal of Wood Science 51: 405-409. https://doi.org/10.1007/s10086-004-0655-x
  17. Unsal, O. and Z. Candan. 2008. Moisture content, vertical density profile and Janka hardness of thermally compressed pine wood panels as a function of press pressure and temperature. Drying Technology 26: 1165-1169. https://doi.org/10.1080/07373930802266306
  18. Unsal, O., S. N. Kartal, Z. Candan, R. A. Arango, C. A. Clausen, and F. Green. 2009. Decay and termite resistance, water absorption and swelling of thermally compressed wood panels. International Biodeterioration & Biodegradation 63(5): 548- 552. https://doi.org/10.1016/j.ibiod.2009.02.001
  19. Wang, J. M., G. J. Zhao, and I. Lida. 2000. Effect of oxidation on heat fixation of compressed wood of China fir. Forestry Studies in China 2(1): 73- 79.
  20. Wang, J. and P. A. Cooper. 2004. Vertical density profiles in thermally compressed balsam fir wood. Forest Products Journal 55(5): 65-68.
  21. Wang, J. and P. A. Cooper. 2005. Effect of grain orientation and surface wetting on vertical density profiles of thermally compressed fir and spruce. Holz als Roh-und Werkstoff 63: 397-402. https://doi.org/10.1007/s00107-005-0034-3
  22. Wang, S. and P. M. Winistorfer. 2000. Fundamentals of vertical density profile formation in wood composites, Part 2, Methodology of vertical density formation under dynamic condition. Wood and Fiber Science 32(3): 220-238.
  23. Yeo, H., J. J. Lee, I. G. Choi, K. J. Yoon, C. D. Eom, J. H. Park, and Y. S. Chang. 2010. Color control of cedar wood and its durability improvement by neat and hot water treatment. In Proceeding of 11th IUFRO Wood Drying Conference. Skelleftea. Sweden. pp. 277-284.

Cited by

  1. Dimensional Responses of Wood Under Cyclical Changing Temperature at Constant Relative Humidity vol.43, pp.5, 2015, https://doi.org/10.5658/WOOD.2015.43.5.539
  2. Effect of thermal modification by hot pressing on performance properties of paulownia wood boards vol.45, 2013, https://doi.org/10.1016/j.indcrop.2012.12.024
  3. Optimal Condition for Torrefaction of Eucalyptus by Response Surface Methodology vol.41, pp.6, 2013, https://doi.org/10.5658/WOOD.2013.41.6.497
  4. A Study on Dimensional Stability and Thermal Performance of Superheated Steam Treated and Thermal Compressed Wood vol.44, pp.2, 2016, https://doi.org/10.5658/WOOD.2016.44.2.184