Effect of accelerated weathering on surface chemistry of modified wood

Abstract

In this study, the effects of UV-light irradiation and water spray on colour and surface chemistry of scots pine sapwood samples were investigated. The specimens were treated with chromated copper arsenate (CCA), a metal-free propiconazol-based formulation, chitosan, furfuryl alcohol and linseed and tall oils. The weathering experiment was performed by cycles of 2 h UV-light irradiation followed by water spray for 18 min. The changes at the surface of the weathered samples were characterised by Fourier transform infrared spectroscopy (FT-IR); colour characterizations were performed by measuring CIELab parameters. The results show that all treatment methods except chitosan treatment provided lower colour changes than the control groups after 800 It exposure in weathering test cycle, but differences between chitosan and control were also small. The lowest colour changes were found on linseed oil (full cell process) and CCA treated wood. FT-IR results show that oil treatment (linseed and tall oil) decreased the intensities of a lignin specific peak (1500-1515 cm(-1)). Absorption band changes at 1630-1660 cm(-1) were reduced by all treatments. (C) 2006 Elsevier B.V. All rights reserved

Published in

Applied Surface Science
2007, volume: 253, number: 12, pages: 5355-5362
Publisher: ELSEVIER SCIENCE BV

SLU Authors

• Hafrén, Jonas

  • Department of Forest Products, Swedish University of Agricultural Sciences
    

• Terziev, Nasko

  • Department of Forest Products, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Forest Science

Publication identifier

• DOI: https://doi.org/10.1016/j.apsusc.2006.12.005

Permanent link to this page (URI)

https://res.slu.se/id/publ/15161