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Continuous surface densification of wood: A new concept for large-scale industrial processing
Gorgan University of Agricultural Scienes & Natural Resources.
Gorgan University of Agricultural Scienes & Natural Resources.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-4526-9391
Gorgan University of Agricultural Scienes & Natural Resources.
Number of Authors: 4
2017 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 12, no 2, 3122-3132 p.Article in journal (Refereed) Published
Abstract [en]

Fast growing and low-density species can be modified by various thermo-hydro-mechanical (THM) treatments. Wood densification is one of the promising techniques for broadening the application of these species. This study focuses on the use of a high-capacity continuous pressing technique that considerably increases the density in the region beneath the surface of poplar wood. Prior to densification at 185 °C, a softening stage was implemented, with water spraying followed by heating at a temperature of 205 °C to 235 °C. The density profile, set-recovery, and morphology of the densified surface were investigated. Densitometry revealed that an M-shaped density profile was created through the thickness, with a peak density of approximately 700 kg/m3 close to the surfaces. The set-recovery after three wetting-drying cycles was 44%, which revealed that partial stress relaxation occurred during the densification. Scanning electron microscopy (SEM) confirmed that both sides of the wood were successfully densified and that after the wetting-drying cycles, the deformed cells did not completely recover.

Place, publisher, year, edition, pages
2017. Vol. 12, no 2, 3122-3132 p.
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-62362DOI: 10.15376/biores.12.2.3122-3132ISI: 000402883700065Scopus ID: 2-s2.0-85018907346OAI: oai:DiVA.org:ltu-62362DiVA: diva2:1079586
Note

Validerad; 2017; Nivå 2; 2017-03-15 (andbra)

Available from: 2017-03-08 Created: 2017-03-08 Last updated: 2017-06-30Bibliographically approved

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Publisher's full textScopushttp://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_12_2_3122_Sadatnezhad_Continuous_Surface_Densification_Wood

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CiteExportLink to record
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