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Macro- and micro-me...
Macro- and micro-mechanical properties of red oak wood (Quercus rubra L.) treated with hemicellulases
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- Konnerth, Johannes (författare)
- BOKU-University of Natural Resources and Applied Life Sciences, Austria
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- Eiser, Martina (författare)
- Competence Center for Wood Composites and Wood Chemistry, Austria
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- Jäger, Andreas (författare)
- Vienna University of Technology, Austria
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- Bader, Thomas K. (författare)
- Vienna University of Technology, Austria
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Hofstetter, Karin (författare)
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- Follrich, Jürgen (författare)
- Competence Center for Wood Composites and Wood Chemistry, Austria
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- Ters, Thomas (författare)
- BOKU-University of Natural Resources and Applied Life Sciences, Austria
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- Hansmann, Christian (författare)
- Competence Center for Wood Composites and Wood Chemistry, Austria
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- Wimmer, Rupert (författare)
- ood Technology and Wood-based Composites Unit, Germany
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(creator_code:org_t)
- Walter de Gruyter GmbH, 2010
- 2010
- Engelska.
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Ingår i: Holzforschung. - : Walter de Gruyter GmbH. - 0018-3830 .- 1437-434X. ; 64:4, s. 447-453
- Relaterad länk:
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http:////www.degruyt...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Trävetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Wood Science (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- Forestry and Wood Technology
- Skog och träteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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