紫外光照射对杉木涂层样品稳定性的影响

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2022-10-01 DOI:10.2478/bsmm-2022-0012

L. Iancu, R. Grigorescu, R. Ion, M. David, Sofia Slamnoiu-Teodorescu

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引用次数: 0

摘要

摘要:本文的目的是评估用聚丙烯酸酯和二氧化钛作为吸收剂对杉木样品抗紫外线降解的保护作用。辐照时间为648小时，相当于2年的风化时间。在辐照前后对样品进行比色、吸水和力学研究。FTIR光谱证实了结构的变化。经过长达648小时的UV处理后，涂层木材样品的颜色变化很小，其中Paraloid B72-TiO2覆盖的样品效果最好。聚合物- tio2涂层具有较高的抗压强度，但所研究样品的吸水能力较小。FTIR显示，随着强度的增加，木质素和聚丙烯酸酯辐照产生了结构变化。研究结果表明，与TiO2混合的拟合物B72和拟合物B67可作为杉木木材的高效紫外线防护涂料。

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

Abstract 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-TiO2. Higher compressive strengths were observed for the polymer-TiO2 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 TiO2 can be used as efficient UV protective coatings for fir wood.

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Scientific Bulletin of Valahia University Materials and Mechanics

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4 weeks