Dynamic and static mechanical properties of Eucalyptus nitens thermally modified in an open and closed reactor system
| Autor: | Holger Militz, Christian Brischke, Maximilian Wentzel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Bending Materials Science (miscellaneous) deflection Young's modulus engineering.material wood anatomy Industrial and Manufacturing Engineering symbols.namesake Flexural strength Deflection (engineering) lcsh:Manufactures Thermal Chemical Engineering (miscellaneous) Relative humidity lcsh:Forestry Composite material high energy multiple impact test 040101 forestry modulus of rupture biology Pulp (paper) modulus of elasticity Forestry 04 agricultural and veterinary sciences bending biology.organism_classification Solid wood symbols engineering lcsh:SD1-669.5 0401 agriculture forestry and fisheries Eucalyptus nitens lcsh:TS1-2301 |
| Zdroj: | Maderas. Ciencia y tecnología, Volume: 21, Issue: 2, Pages: 141-152, Published: MAR 2019 Maderas. Ciencia y tecnología v.21 n.2 2019 SciELO Chile CONICYT Chile instacron:CONICYT Maderas: Ciencia y Tecnología, Vol 21, Iss 2, Pp 141-152 (2019) Maderas: Ciencia y Tecnología, Vol 21, Iss 2 (2018) |
| Popis: | Eucalyptus nitens is a fast growing plantation species that has a good acclimation in Chile. It is commonly used for pulp and paper, but there is a growing market for solid wood products made from this species and an interest on producing high quality material. Thermal modification technology have been used to obtain high quality product out of fast growing plantation species. In this study we modified Eucalyptus nitens to analyse the influences of the process conditions and evaluated its mechanical properties under several process conditions. The material was modified in a closed system under elevated pressure and controlled relative humidity (30 and 100% relative humidity) at temperatures between 150 and 170°C, and in an open system with a standard thermal modification procedure between 160 and 230°C. Modulus of elasticity, modulus of rupture, deflection and work in bending (in elastic and inelastic proportions) and the resistance to impact milling in high energy multiple impact tests were determined. Mass loss after each modification was also measured and correlated with the mechanical properties. Anatomical properties of selected modifications were analysed. There were no significant differences between open and closed system modifications in both mechanical and anatomical properties. |
| Databáze: | OpenAIRE |
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