Repository logo
 

Effects of an innovative densification process on mechanical and physical properties of beech and Norway spruce veneers

Published version
Peer-reviewed

Change log

Authors

Cencin, A 
Urso, T 
Crivellaro, A 

Abstract

jats:titleAbstract</jats:title>jats:pIncreased wood density is obtained by compressing the wood porous structure under suitable moisture and temperature conditions to improve its physical, mechanical and color properties. A recently proposed wood densification method based on partial removal of lignin and hemicellulose in hot water solution of sodium hydroxide and sodium sulphite has shown promising results on solid wood. However, its applicability and effect on thin wood veneers have not been tested yet. In this study, the timing of the method has been adapted to estimate the densification treatment intensity dependence of wood properties (wood density and modulus of elasticity) and color change of softwood (Norway spruce) and hardwood (beech) veneers. Compared to control, density and rigidity increased, with improved wood properties peaking after only 90 s of treatment intensity. Furthermore, the color became darker after treatment compared to control, with no significant color difference between treatment intensities. In conclusion, densification of veneers, according to the presented adapted method, provides a significant improvement of veneers physical and mechanical properties, and produces color changes perceptible by the human eye. Our results can be further implemented and adapted to application in industrial plants, calling for new application of densified veneers.</jats:p>

Description

Keywords

Wood densification, MOE, Wood color, Veneers, Wood density

Journal Title

Journal of Wood Science

Conference Name

Journal ISSN

1435-0211
1611-4663

Volume Title

67

Publisher

Springer Science and Business Media LLC