Authors: Freddy Muñoz Paulina Valenzuela William Gacitúa
Publish Date: 2012/06/13
Volume: 108, Issue: 4, Pages: 1007-1014
Abstract
In this study Eucalyptus nitens species was nanocharacterized to determine variability in nanomechanical properties within the cellular ultrastructure between the bark and wood fibers Three factors including site 2 levels family 2 levels and fiber type bark and wood were analyzed using three response variables including the elastic modulus E hardness H and ductility ratio E/H in the middle lamella ML and the cell wall within the S2 layer The results indicated significant differences for E S2 and H S2 when comparing fiber types E S2≈1252 GPa and H S2≈031 GPa for wood fiber and E S2≈1081 GPa and H S2≈026 GPa for bark fiber There is not statistically significant difference in ductility ratio E/H in S2 and ML between fiber types These results indicate that bark and wood fibers can be used together or separately in the development of new composite materials and engineering productsWe are grateful to the Biomaterials Nanotechnology Center at the Department of Wood Engineering at the University of BioBio for logistical support and equipment testing and to Forestal Mininco for providing a study raw material trees as well as to the FONDEF Project No D07i1101 for financial support and to the Organization of American States OAS and Technological Institute of Costa Rica for scholarships support
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