期刊
HOLZFORSCHUNG
卷 67, 期 2, 页码 227-235出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/hf-2011-0247
关键词
4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT); chromic acid; FTIR spectroscopy; hindered amine light stabilizer (HAL); hydroxyphenyl bezotriazole; isothiazolone; lignin; loblolly pine; Pinus taeda; UV stabilizers; water repellents; wax; weathering; wood surfaces
资金
- Viance LLC
Visual appeal of wood is as important as its structural integrity in outdoor applications. Discoloration and checking of wood favor the utilization of alternative materials for outdoor cladding and decking. Lignin depolymerization is one of the critical processes leading to weathering. In the present paper, the potential of different classes of surface protection agents has been assessed on loblolly pine (Pinus taeda) impregnated with water repellents, organic UV inhibitors, and an organic biocide. The treated samples were exposed to predetermined doses of solar radiation in Eastern Oregon, and the chemical changes occurring on the surfaces were evaluated by FTIR spectroscopy. After 1-year exposure, lignin loss was complete on all surfaces; however, some treatments provided longer term protection than others. Organic UV light inhibitors were most effective in this regard. A petroleum-based water repellent with a melting point of 54-58 degrees C also provided protection against lignin degradation.
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