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Decay Resistance of Borate-Modified Oriented Strandboard: A Comparison of Zinc and Calcium Borate  

Lee, Sun-Young (Division of Environmental Material Engineering, Department of Forest Products, Korea Forest Research Institute)
WU, Qinglin (School of Renewable Natural Resources, Louisiana State University)
Publication Information
Journal of the Korean Wood Science and Technology / v.36, no.5, 2008 , pp. 1-10 More about this Journal
Abstract
Decay and mold resistance of zinc borate (ZB) and calcium borate (CB) modified oriented strandboard (OSB) from southern mixed hardwood and southern yellow pine was investigated in this study. Brown rot fungus Gloeophyllum trabeum and white-rot fungus Trametes versicolar were used to examine the decay resistance of the OSB. The OSB test specimens were colonized by brown and white rot fungal mycelium in both the brown and white-rot culture bottles after 8 and 12 weeks, respectively. The wood species and fungus type had the significant effects on the decay resistance. Brown rot decay was evident for all untreated southern pine and mixed hardwood controls. The white-rot decay, however, did not show significant weight loss at both species control samples. The incorporation of ZB and CB composites provides suitable protection against brown-and white-rot fungi. No significant weight loss was observed from the borate treated OSB.
Keywords
ZB; CB; oriented strandboard; white rot; brown rot; decay resistance; weight loss; ratings;
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