The Effect of UV Irradiation on the Stability of Coated Fir Wood Samples

The aim of the paper consists in assessing the protection of fir wood samples against UV degradation by using polyacrylates and titanium dioxide as absorber. The irradiation was achieved for 648 hours, considered as about 2 years of weathering. Colorimetric, water absorption, and mechanical investig...

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Published in:The Scientific Bulletin of "Valahia" University, Materials and Mechanics Materials and Mechanics, 2022-10, Vol.18 (19), p.8-14
Main Authors: Iancu, Lorena, Grigorescu, Ramona Marina, Ion, Rodica-Mariana, David, Madalina Elena, Slamnoiu-Teodorescu, Sofia
Format: Article
Language:English
Subjects:
colorimetric tests
consolidant efficiency
fir wood
polyacrylates coatings
UV irradiation
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description The aim of the paper consists in assessing the protection of fir wood samples against UV degradation by using polyacrylates and titanium dioxide as absorber. The irradiation was achieved for 648 hours, considered as about 2 years of weathering. Colorimetric, water absorption, and mechanical investigations were performed on samples before and after irradiation. The structural changes were evidenced by FTIR spectroscopy. Small changes in color for coated wood samples are observed after maximum 648 h of UV treatment, with the best results obtained for the specimen covered with Paraloid B72-TiO . Higher compressive strengths were observed for the polymer-TiO coatings, in correlation with a smaller water absorption capacity of the studied samples. FTIR revealed shifted peaks with increased intensities as proof of structural changes produced by irradiation of lignin and polyacrylates. The results highlight that Paraloid B72 and Paraloid B67 mixed with TiO can be used as efficient UV protective coatings for fir wood.
doi_str_mv 10.2478/bsmm-2022-0012
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subjects colorimetric tests
consolidant efficiency
fir wood
polyacrylates coatings
UV irradiation
title The Effect of UV Irradiation on the Stability of Coated Fir Wood Samples
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