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European Journal of Wood and Wood Products

, Volume 69, Issue 2, pp 255–262 | Cite as

Effect of oil heating age on colour and dimensional stability of heat treated Pinus radiata

  • Manoj Kumar Dubey
  • Shusheng PangEmail author
  • John Walker
Originals Originalarbeiten

Abstract

Pinus radiata specimens with moisture content of 8–11% and dimensions of 90×35×200 mm3 were heat-treated in an oil bath of commercial grade raw linseed oil. The effect of oil aging was investigated under treatment condition of 180°C and 3 hours by using oil that had been preheated for 0, 3, 9, 15, 21, and 27 hours, respectively, before the wood treatment. After treatment using oils of varying ages, wood colour change was examined using a Minolta spectrophotometer through CIE 1976 (L*a*b) system. Water repellent efficiency and anti swelling efficiency in high humidity conditions were measured to determine the stability of the treated wood.

The results show that stability of the treated wood was improved significantly compared to the matched untreated wood but the treated wood tended to be darker. Oil viscosity increased with the heating age resulting in slight decrease in weight percentage gain. Water repellent efficiency was decreased with an increase in heating age of oil. However no significant difference in total colour variation and wood stability (anti swelling efficiency) was observed between specimens treated with oils of varying heating age.

Keywords

Dimensional Stability Treated Wood Wood Colour Weight Percentage Change Heat Treated Wood 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

ASE

Anti-swelling Efficiency

CIE

Commission internationale de l’éclairage

WPC

Weight Percentage Change

WRE

Water Repellent Efficiency

Einfluss der Gebrauchsdauer des Ölbades auf die Färbung und Dimensionsstabilität von wärmebehandelter Radiatakiefer

Zusammenfassung

Pinus radiata Prüfkörper mit einer Holzfeuchte von 8–11 % und den Abmessungen 90×35×200 mm3 wurden in einem Ölbad aus Rohleinöl wärmebehandelt. Der Einfluss der Gebrauchsdauer des Ölbades wurde bei einer Wärmebehandlung von 180°C und 3 Stunden untersucht. Das dabei verwendete Öl war vor dieser Behandlung für eine Dauer von 0, 3, 9, 15, 21 und 27 Stunden vorerhitzt worden. Nach der Wärmebehandlung im unterschiedlich lang vorerhitzten Ölbad wurde die Farbveränderung im Holz mit einem Minolta Spektralfotometer anhand des CIE 1976 (L * a * b) Systems untersucht. Zur Bestimmung der Stabilität des behandelten Holzes wurden das Wasserabstoßungsvermögen und das Quellresistenzvermögen bei hoher Umgebungsfeuchte ermittelt.

Die Ergebnisse zeigen, dass die Stabilität des behandelten Holzes im Vergleich zu unbehandeltem Holz signifikant besser war, sich aber tendenziell dunkel verfärbte. Die Ölviskosität nahm mit zunehmender Dauer der Vorerhitzung zu. Dies führte zu einer leicht sinkenden Massenzunahme des Holzes. Das Wasserabstoßungsvermögen nahm mit zunehmender Dauer der Vorerhitzung des Öls ab. Hinsichtlich der Farbveränderung und des Quellresistenzvermögens konnte jedoch kein signifikanter Unterschied zwischen den Prüfkörpern, die mit unterschiedlich lang vorerhitzten Ölen behandelt worden waren, festgestellt werden.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Manoj Kumar Dubey
    • 1
  • Shusheng Pang
    • 1
    Email author
  • John Walker
    • 2
  1. 1.Department of Chemical and Process EngineeringUniversity of CanterburyChristchurchNew Zealand
  2. 2.School of ForestryUniversity of CanterburyChristchurchNew Zealand

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