Thursday, 24 November 2016

Thermo-hydro-mechanical behaviour of acetylated wood: swelling, compression set recovery and mouldability

Published Date
Brief Original
DOI: 10.1007/s00107-016-1131-1

Cite this article as: 
Lallart, PY., Wehsener, J., Hartig, J. et al. Eur. J. Wood Prod. (2016). doi:10.1007/s00107-016-1131-1

Author
  • Pierre-Yves Lallart
  • Jörg Wehsener
  • Jens Hartig
  • Peer Haller
Abstract

Acetylated wood made from radiata pine (Pinus radiata D. Don) was densified at different temperatures in order to investigate its applicability to wood moulding. Six different densification levels ranging from 10 to 60% were carried out each at the temperature levels 80 and 110 °C. The swelling behaviour in cold (20 °C) and warm (60 °C) water and set-recovery cycles were investigated. Densified acetylated wood possesses compression set recovery especially at elevated temperature and humidity. Finally, a tubular section was moulded using a thermo-hydro-mechanical process. Such profiles are supposed to be used for structural purposes. They benefit from the strength, durability and dimension stability of acetylated wood, which in turn gains competitiveness in a material efficient structural product.

References 

  1. Bongers F, Alexander J, Marcroft J, Crawford D, Hairstans D (2013) Structural design with Accoya wood. Int Wood Prod J 4:172–176CrossRefGoogle Scholar
  2. Kollmann F (1936) Technologie des Holzes (Technology of wood) (In German). Springer, BerlinGoogle Scholar
  3. Kutnar A, Sandberg D, Haller P (2015) Compressed and moulded wood from processing to products—a review. Holzforschung 69:885–897CrossRefGoogle Scholar
  4. Militz H (1991) Die Verbesserung des Schwind- und Quellverhaltens und der Dauerhaftigkeit von Holz mittels Behandlung mit unkatalysiertem Essigsäureanhydrid (The improvement of dimensional stability and durability of wood through treatment with non-catalysed acetic-acid anhydrid) (In German). Holz Roh- Werkst 49:147–152CrossRefGoogle Scholar
  5. Sandberg D, Haller P, Navi P (2013) Thermo-hydro and thermo-hydro-mechanical wood processing: an opportunity for future environmentally friendly wood products. Wood Mater Sci Eng 8:1–25CrossRefGoogle Scholar
  6. Wehsener J, Weser T, Haller P, Diestel O, Cherif C (2014) Textile reinforcement of multidimensional formable wood. Eur J Wood Prod 72:463–475CrossRefGoogle Scholar

For further details log on website :
http://link.springer.com/article/10.1007/s00107-016-1127-x

No comments:

Post a Comment