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Microstructural and physical aspects of heat treated wood, part 2: hardwoods

Michiel J Boonstra, JF Rijsdijk, C Sander, Edo V Kegel, B Tjeerdsma, Holger Militz, Joris Van Acker UGent and Marc Stevens UGent (2006) MADERAS. CIENCIA Y TECNOLOGIA. 8(3). p.209-218
abstract
Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Optimisation of a two-stage heat treatment process at relatively mild conditions (<200°C) and its effect on the anatomical structure of hardwoods were investigated by means of a light and scanning electron microscopic analysis. Hardwood species such as beech and poplar, were predominantly sensitive to collaps of the vessels and some deformation of the libriform fibres directly near the vessels. In treated beech and birch radial cracks were observed near the rays. Optimisation of the heat treatment process conditions including the application of a steam hydro thermolysis stage reduced such damages to a minimum. Broken cell walls perpendicular to the fibre direction resulting in transverse ruptures has been noticed in heat treated hardwood species. This contributes to abrupt fractures of treated wood as observed in bending tests which can lead to considerably different failure behavior after impact of mechanical stress. In some treated hardwood species maceration (small cracks between tracheids) was noticed after heat treatment. Heat treatment did not reveal damage to the ray parenchyma pit membranes, bordered pits and large window pit membranes; and the margo fibrils appeared without damage.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Wood modification, microscopy, hardwood, heat treatment
journal title
MADERAS. CIENCIA Y TECNOLOGIA
Maderas, Cienc. Tecnol.
volume
8
issue
3
pages
209 - 218
ISSN
0718-221X
DOI
10.4067/S0718-221X2006000300007
language
English
UGent publication?
yes
classification
A2
additional info
heavy file (21.2 Mb)
copyright statement
I have transferred the copyright for this publication to the publisher
id
852675
handle
http://hdl.handle.net/1854/LU-852675
alternative location
http://www.scielo.cl/pdf/maderas/v8n3/art07.pdf
date created
2010-02-05 11:10:37
date last changed
2010-02-16 10:06:53
@article{852675,
  abstract     = {Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Optimisation of a two-stage heat treatment process at relatively mild conditions ({\textlangle}200{\textdegree}C) and its effect on the anatomical structure of hardwoods were investigated by means of a light and scanning electron microscopic analysis. Hardwood species such as beech and poplar, were predominantly sensitive to collaps of the vessels and some deformation of the libriform fibres directly near the vessels. In treated beech and birch radial cracks were observed near the rays. Optimisation of the heat treatment process conditions including the application of a steam hydro thermolysis stage reduced such damages to a minimum. Broken cell walls perpendicular to the fibre direction resulting in transverse ruptures has been noticed in heat treated hardwood species. This contributes to abrupt fractures of treated wood as observed in bending tests which can lead to considerably different failure behavior after impact of mechanical stress. In some treated hardwood species maceration (small cracks between tracheids) was noticed after heat treatment. Heat treatment did not reveal damage to the ray parenchyma pit membranes, bordered pits and large window pit membranes; and the margo fibrils appeared without damage.},
  author       = {Boonstra, Michiel J and Rijsdijk, JF and Sander, C and Kegel, Edo V and Tjeerdsma, B and Militz, Holger and Van Acker, Joris and Stevens, Marc},
  issn         = {0718-221X},
  journal      = {MADERAS. CIENCIA Y TECNOLOGIA},
  keyword      = {Wood modification,microscopy,hardwood,heat treatment},
  language     = {eng},
  number       = {3},
  pages        = {209--218},
  title        = {Microstructural and physical aspects of heat treated wood, part 2: hardwoods},
  url          = {http://dx.doi.org/10.4067/S0718-221X2006000300007},
  volume       = {8},
  year         = {2006},
}

Chicago
Boonstra, Michiel J, JF Rijsdijk, C Sander, Edo V Kegel, B Tjeerdsma, Holger Militz, Joris Van Acker, and Marc Stevens. 2006. “Microstructural and Physical Aspects of Heat Treated Wood, Part 2: Hardwoods.” Maderas. Ciencia Y Tecnologia 8 (3): 209–218.
APA
Boonstra, Michiel J, Rijsdijk, J., Sander, C., Kegel, E. V., Tjeerdsma, B., Militz, H., Van Acker, J., et al. (2006). Microstructural and physical aspects of heat treated wood, part 2: hardwoods. MADERAS. CIENCIA Y TECNOLOGIA, 8(3), 209–218.
Vancouver
1.
Boonstra MJ, Rijsdijk J, Sander C, Kegel EV, Tjeerdsma B, Militz H, et al. Microstructural and physical aspects of heat treated wood, part 2: hardwoods. MADERAS. CIENCIA Y TECNOLOGIA. 2006;8(3):209–18.
MLA
Boonstra, Michiel J, JF Rijsdijk, C Sander, et al. “Microstructural and Physical Aspects of Heat Treated Wood, Part 2: Hardwoods.” MADERAS. CIENCIA Y TECNOLOGIA 8.3 (2006): 209–218. Print.