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Dynamic and static mechanical properties of eucalyptus nitens thermally modified in an open and closed reactor system

Dynamic and static mechanical properties of eucalyptus nitens thermally modified in an open and closed reactor system

Authors :
Maximilian Wentzel
Christian Brischke
Holger Militz
Source :
Maderas: Ciencia y Tecnología, Vol 21, Iss 2 (2019)
Publication Year :
2019
Publisher :
Universidad del Bío-Bío, 2019.

Abstract

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.

Details

Language :
English, Spanish; Castilian
ISSN :
07173644 and 0718221X
Volume :
21
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Maderas: Ciencia y Tecnología
Publication Type :
Academic Journal
Accession number :
edsdoj.3b82be9e24a94029b0e044c930fe57b3
Document Type :
article