Dvořák Ondřej, Kvietková Monika Sarvašová, Šimůnková Kristýna, Machanec Ondřej, Pánek Miloš, Pastierovič Filip, Lin Chia-Feng, Jones Dennis
Department of Wood Processing and Biomaterials, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamýcká 1176, 165 00 Prague, Czech Republic.
Department of Engineering Sciences and Mathematics, Wood Science and Engineering, Lulea University of Technology, Forskargatan 1, SE-931 87 Skellefteå, Sweden.
Polymers (Basel). 2023 Jul 30;15(15):3251. doi: 10.3390/polym15153251.
This study determined the impact of undertaking an initial treatment of oak wood by sealing its surface pores with epoxy resin, focusing on the durability of transparent coating systems when exposed outdoors. Throughout the exposure period, various parameters including color, gloss, surface wettability, and both macroscopic and microscopic surface evaluation were continuously monitored. The study involved two sets of samples: one set underwent the pretreatment, while the other did not. Subsequently, four coating systems were applied to the samples, comprising two solvent-based and two water-based coatings. The experiment was conducted over a period of two years, utilizing natural weathering methods within the premises of the Czech University of Life Sciences in Prague. The pretreatment with epoxy resin exhibited enhanced durability for all paint systems. The analysis showed a significant difference in gloss and color after 12 months of weathering exposure without any significant effect on surface wettability and sealing. However, after 24 months of the weathering exposure, no significant differences between the sealed and unsealed surface were observed. The most significant change in properties was noted for the water-based coatings used in coating systems number 3 and 4, and these coatings were rated as the best.
本研究通过用环氧树脂密封橡木表面孔隙来确定对橡木进行初始处理的影响，重点关注透明涂层系统在户外暴露时的耐久性。在整个暴露期间，持续监测各种参数，包括颜色、光泽度、表面润湿性以及宏观和微观表面评估。该研究涉及两组样品：一组进行预处理，另一组未进行预处理。随后，将四种涂层系统应用于样品，包括两种溶剂型和两种水性涂料。实验在两年时间内进行，利用布拉格捷克生命科学大学内的自然风化方法。用环氧树脂进行的预处理对所有涂料系统均显示出更高的耐久性。分析表明，风化暴露12个月后，光泽度和颜色存在显著差异，但对表面润湿性和密封性没有任何显著影响。然而，在风化暴露24个月后，未观察到密封表面和未密封表面之间存在显著差异。涂层系统3和4中使用的水性涂料的性能变化最为显著，这些涂料被评为最佳。
