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Characterization of viscoelastic, shrinkage and transverse anatomy properties of four Australian hardwood species

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Redman, A., Bailleres, H. and Perré, P. (2011) Characterization of viscoelastic, shrinkage and transverse anatomy properties of four Australian hardwood species. Wood Material Science & Engineering, 6 (3). pp. 95-104. ISSN 1748-0272

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Article Link(s): https://doi.org/10.1080/17480272.2010.535014

Abstract

Several key wood properties of four Australian hardwood species: Corymbia citriodora, Eucalyptus pilularis, Eucalyptus marginata and Eucalyptus obliqua, were characterized using state-of-the-art equipment at AgroParisTech, ENGREF, France. The wood properties were measured for input into microscopic (cellular level) and macroscopic (board level) vacuum-drying models currently under development. Morphological characterization was completed using a combination of environmental scanning electron microscopy and image analysis software. A clear difference in fibre porosity, size, wall thickness and orientation was evident between species. Viscoelastic properties were measured in the tangential and radial directions using dynamic mechanical analysis instrumentation. The glass transition temperature was markedly different for each species owing to anatomical and chemical variations. The radial direction showed higher stiffness, internal friction and glass transition temperature than the tangential direction. A highly sensitive microbalance and laser technology were used to measure loss of moisture content in conjunction with directional shrinkage on microsamples. Collapse shrinkage was clearly evident with this method for E. obliqua, but not with other species, consistent with industrial seasoning experience. To characterize the wood?water relations of E. obliqua, free of collapse, thinner sample sections (in the radial?tangential plane) are recommended.

Item Type:Article
Business groups:Horticulture and Forestry Science
Subjects:Forestry > Research. Experimentation
Forestry > Forestry machinery and engineering
Forestry > Exploitation and utilization
Deposited On:16 Jun 2022 00:39
Last Modified:16 Jun 2022 00:40

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