Abstract
Thermal modification of wood has gained its niche in the production of materials that are mainly used for outdoor applications, where the stability of aesthetic appearances is very important. In the present research, spectral sensitivity to discoloration of thermally modified (TM) aspen wood was assessed and, based on these results, the possibility to delay discoloration due to weathering by non-film forming coating containing transparent iron oxides in the formulation was studied. The effect of including organic light stabilizers (UVA and HALS) in coatings as well as pretreatment with lignin stabilizer (HALS) was evaluated. Artificial and outdoor weathering was used for testing the efficiency of different coating formulations on TM wood discoloration. For color measurements and discoloration assessment, the CIELAB color model was used. Significant differences between the spectral sensitivity of unmodified and TM wood was observed by implying that different strategies could be effective for their photostabilization. From the studied concepts, the inclusion of the transparent red iron oxide into the base formulation of the non-film forming coating was found to be the most effective approach for enhancing TM wood photostability against discoloration due to weathering.
Funder
European Regional Development Fund
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces
Reference51 articles.
1. Wood Modification: Chemical, Thermal, and Other Processes;Hill,2006
2. Wood modification by heat treatment: A review
3. Processes and Properties of Thermally Modified Wood Manufactured in Europe
4. An approach to classify thermally modified hardwoods by color;Schnabel;For. Prod. J.,2007
5. Effect of thermal modification on wood colour;Cirule;Res. Rural Dev.,2015
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