Abstract
Wood, as a natural composite material used mainly in exterior construction and building applications, requires long-term durability under exposure to environmental factors including solar UV radiation, temperature, humidity and pollutants. The outdoor service life of wood and wood based materials, namely wood–thermoplastic polymer composites, is strongly related to their deterioration under weathering conditions. Wood is extremely sensitive to UV radiation in the range from 300 to 400 nm. Photo-chemical degradation of wood causes significant structural and color changes, lignin component being the most susceptible to de-polymerization reactions by which phenoxy radicals are generated as intermediates and further oxidized into colored chromophores (quinones). Effective treatments, e.g. UV photo-stabilizers, or surface coatings of wood products, e.g. paints, varnishes, stains or water repellents, may provide significant wood protection against weathering in long-term outdoor applications.
Dedicated to the memory of my dear friend and colleague, Dr. Ruxanda Bodîrlău, who recently passed away.
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Teacă, CA., Bodîrlău, R. (2016). Photochemical Behavior of Wood Based Materials. In: Rosu, D., Visakh P. M. (eds) Photochemical Behavior of Multicomponent Polymeric-based Materials. Advanced Structured Materials, vol 26. Springer, Cham. https://doi.org/10.1007/978-3-319-25196-7_4
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