Dimensional Stability of Poplar Wood after Densification Combined with Heat Treatment

Abstract:

Hybrid poplar boards were subjected to thermo-mechanical densification combined with heat treatment. Hydroscopicity and hygroscopicity of the treated samples were measured. The results showed that dimensional stability of the samples was influenced by compression set significantly. The higher the compression set, the greater the swelling of the samples. On the contrary, the influence of densification temperature and duration was not significant. Thermal modification significantly reduced hydroscopicity and hygroscopicity of the samples. Both higher treatment temperature and longer holding time resulted in better dimensional stability.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 112-116
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.112
• Online since: January 2012
• Authors: Jia Bin Cai, Tao Ding, Liu Yang
• Keywords: Densification, Dimensional Stability, Heat Treatment, Poplar Wood

References

[1] N. Morsing: Densification of wood. The influence of hygrothermal treatment on compression of beech perpendicular to the grain. Doctoral thesis, Technical University of Denmark (1997).

[2] C. Fang, N. Mariotti, A. Cloutier, A. Koubaa, P. Blanchet, Densification of wood veneers by compression combined with heat and steam, Eur. J. Wood Prod. (2011) DOI 10. 1007/s00107-011- 0524-4.

DOI: 10.1007/s00107-011-0524-4

[3] C. R. Welzbacher, J. Wehsener, A. O. Rapp, P. Haller, Thermo-mechanical densification combinedwith thermal modification ofNorway spruce (Picea abies Karst) in industrial scale –Dimensional stability and durability aspects, Holz Roh Werkst 66 (2008).

DOI: 10.1007/s00107-007-0198-0

[4] X. Yang, S. Gao, Study on fixing compressive deformation of  fast-grown poplar wood by heat treatment, J. of Changchun Univ. of Tech. 27(1) (2006) 75-77.

[5] M. J. Boonstra and B. Tjeerdsma, Chemical analysis of heat treated softwoods, Holz Roh- Werkst 64 (2006) 204–211.

DOI: 10.1007/s00107-005-0078-4

[6] J. O. Brito, F. G. Silva, M. M. Leão, G. Almeida, Chemical composition changes in eucalyptus and pinus woods submitted to heat treatment, Bioresour. Technol. 99 (2008) 8545–8548.

DOI: 10.1016/j.biortech.2008.03.069

[7] M. Borrega, and P. P. Karenlampi, Mechanical behavior of heat-treated spruce ( Picea abies ) wood at constant moisture content and ambient humidity, Holz Roh- Werkst 66 (2008) 63-69.

DOI: 10.1007/s00107-007-0207-3

[8] M. Akgul, E. Gumuskaya, S. Korkut, Crystalline structure of heat-treated Scots pine [Pinus sylvestris L. ] and Uludağ fir [Abies nordmanniana (Stev. ) subsp. bornmuelleriana (Mattf. )] wood, Wood Sci Technol. 41 (2007) 281–289.

DOI: 10.1007/s00226-006-0110-9

[9] Md. Tariqur, R. Bhuiyan, N. Hirai, N. Sobue, Changes of crystallinity in wood cellulose by heat treatment under dried and moist conditions, J. Wood Sci. 46 (2000) 431-436.

DOI: 10.1007/bf00765800

[10] E. Windeisen, C. Strobel and G. Wegener, Chemical changes during the production of thermo-treated beech wood, Wood Sci. Technol. 41 (2007) 523-536.

DOI: 10.1007/s00226-007-0146-5

[11] E. Windeisen and G. Wegener, Behavior of lignin during thermal treatments, Ind. Crop Prod. 27 (2008) 157-162.