Abstract
Protection from UV radiation is important for the performance of wood substrate and the coating that protects it. Ultraviolet light causes degradation of both wood substrate and coating polymers. Additives (UV stabilizers) are generally added into the coating to reduce the adverse influence of UV radiations under exterior applications. The performance of coating depends upon the amount and type of UV absorbers used in the coating. In this study, the effectiveness of titanium dioxide (TiO2) nanoparticles for protection of wood surfaces and polyurethane (PU) against UV light was studied. TiO2 nanoparticles were chemically functionalized with an organic alkoxy silane (3-GlycidoxyPropylTriMethoxySilane), and modified nanoparticles were dispersed in PU coating. Rubberwood surfaces were coated with nanoparticles dispersed PU coatings and were exposed to UV light in an accelerated weathering tester for 500 h. Colour changes occurred due to UV light exposure were analysed at regular intervals of time. Dispersion of TiO2 nanoparticles in PU coatings restricted the photo-yellowing of wood surfaces.
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Srinivas, K., Pandey, K.K. (2017). Enhancing Photostability of Wood Coatings Using Titanium Dioxide Nanoparticles. In: Pandey, K., Ramakantha, V., Chauhan, S., Arun Kumar, A. (eds) Wood is Good. Springer, Singapore. https://doi.org/10.1007/978-981-10-3115-1_23
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DOI: https://doi.org/10.1007/978-981-10-3115-1_23
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