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Macro- and micro-mechanical properties of red oak wood (Quercus rubra L.) treated with hemicellulases
BOKU-University of Natural Resources and Applied Life Sciences, Austria.
Competence Center for Wood Composites and Wood Chemistry, Austria.
Vienna University of Technology, Austria.
Vienna University of Technology, Austria.ORCID iD: 0000-0002-7829-4630
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2010 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 64, no 4, 447-453 p.Article in journal (Refereed) Published
Abstract [en]

Red oak wood (Quercus rubra L.) samples were submitted to an enzymatic treatment with a commercial mixture of hemicellulases aiming at the selective depolymerization and removal of the hemicelluloses. Mechanical properties of treated samples were characterized and compared with untreated samples at two hierarchical levels. At the macrolevel, tensile properties revealed to be less sensitive to degradation of the cell wall matrix compared to compression and hardness properties. Results obtained through indentation at the microlevel indicated that hardness and the so-called reduced modulus of treated wood were significantly lowered. Accordingly, hardness and reduced elastic modulus have proven to be most sensitive to modification of the cell wall matrix by reducing the content of hemicelluloses. It is proposed that transversal and shear stresses, which are mainly carried by the cell wall matrix, are additional parameters having strong effects on elastic modulus obtained by nanoindentation. Micromechanical modeling was employed to confirm the observed changes. There is consistency between the measured and the modeled properties, obtained at both the microlevel and the macrolevel of wood.

Place, publisher, year, edition, pages
2010. Vol. 64, no 4, 447-453 p.
National Category
Wood Science Composite Science and Engineering
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:lnu:diva-51216DOI: 10.1515/hf.2010.056OAI: oai:DiVA.org:lnu-51216DiVA: diva2:913867
Note

4

Available from: 2016-03-22 Created: 2016-03-22 Last updated: 2016-03-23Bibliographically approved

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Publisher's full texthttp:////www.degruyter.com/view/j/hfsg.2010.64.issue-4/hf.2010.056/hf.2010.056.xml

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Bader, Thomas K.
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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