Photostabilisation of wood using aromatic vinyl esters |
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Authors: | Mohamed Jebrane Ian Cullis |
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Institution: | a Unité Sciences du Bois et des Biopolmères, Université Bordeaux 1, INRA, CNRS, UMR US2B 351 Cours de la Libération, Talence F-33405, France b Centre for Advanced Wood Processing, University of British Columbia, 2900-2424, Main Mall, Vancouver, BC V6T 1Z4, Canada |
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Abstract: | Thin wood veneers were esterified to different weight gains with vinyl benzoate, vinyl cinnamate or vinyl-4-T-butylbenzoate to graft aromatic groups to wood's molecular components. We hypothesised that such modification would increase the resistance of wood to photodegradation. There was a linear relationship between the level of esterification of wood with vinyl benzoate and the photostability of the modified veneers exposed to natural weathering. Vinyl benzoate protected lignin and cellulose in wood from photodegradation at high weight gains (>30%) whereas modification of wood with vinyl-4-T-butylbenzoate provided no such protection and vinyl cinnamate increased the photodegradation of wood. We provide an explanation for why these effects occurred and discuss the implications of our findings for the development of weather-resistant wood materials. |
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Keywords: | Wood Photostabilization Chemical modification Aromatic vinyl esters |
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