The Effect of Post-Steaming on Copper Naphthenate-Treated Southern Pine
Keywords:XPS, XRD, ESEM-EDXA, copper naphthenate, cuprous oxide, steam, wood preservatives, southern yellow pine
AbstractThe reduction of copper from cupric (Cu2+) to cuprous (Cu1+) form in post-steamed copper naphthe-nate-treated southern pine was monitored. The amount of cuprous oxide formed after the post-steam treatment was determined by X-ray diffraction (XRD). About 50% of copper was reduced from cupric to cuprous in post-steamed samples treated to a retention of 0.31 to 0.51% total copper. Less than 15% of the copper was reduced to cuprous in the post-steamed samples containing 0.71% total copper. Environmental scanning electron microscopy (ESEM) was used to collect images of the crystalline cuprous oxide deposits on the wood cell walls.
American Wood Preservers' Association (AWPA). 1996. Standard method of determining the leachability of wood preservatives. AWPA standard E11-87. AWPA, Woodstock, MD.nAyres, G. H. 1958. Quantitative chemical analysis. Harper & Brothers, New York, NY.nBarnes, M., and R. W. Hein. 1988. Treatment of steamconditioned pine poles with copper naphthenate in hydrocarbon solvent. Rec. Ann. Conv. BWPA, 3-33.nBratt, R. P., D. J. Squirrell, S. Millington, G. Manton, and W. Hoskins. 1992. Comparison of the performance of several wood preservatives in a tropical environment. Int. Biodeterior. Biodegrad. 29(1):61-73.nDe Groot, R. C., C. L. Link, and J. B. Huffman. 1988. Field trials of copper naphthenate treated wood. Proc. Am. Wood Preserv. Assoc. 84:186-200.nFreeman, M. H. 1994. Copper naphthenate: An effective wood pole and cross arm preservative. Pages 68-77 in Proc. First Southern Pole Conference. Forest Products Society, Madison, WI.nHarp, K. L., and S. L. Grove. 1993. Evaluation of wood and soil samples from copper naphthenate-treated utility poles in service. Proc. Am. Wood Preserv. Assoc. 89: 167-191.nHartford, W. H. 1973. Chemical and physical properties of wood preservatives. In D. D. Nicholas, ed. Wood deterioration and its prevention by preservative treatment. Syracuse Univ. Press, Syracuse, NY.nKalnins, M. A., R. S. Boone, and D. I. Gutzmer. 1990. Practical preservation procedures for beehive bodies. Am. Bee J. 130(5):337-340.nKamdem, D. P., K. Gruber, and M. Freeman. 1995. Laboratory evaluation of copper naphthenate as wood preservative for northern red oak. Forest Prod. J. 45(9):72-76.nKamdem, D. P. 1997. Unpublished report.nKlug, H. P., and L. E. Alexander. 1954. X-ray diffraction procedures for polycrystalline and amorphous materials, 1st ed. John Wiley and Sons Inc., New York, NY.n
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