Comparison of two encapsulation systems of UV stabilizers on the UV protection efficiency of wood clear coats
-
Caroline Queant
,
Pierre Blanchet
Abstract
One of the major issues in the wood industry is the durability of clear coatings. The addition of organic ultraviolet absorbers (UVAs) improves coating resistance by the absorption and conversion of UV radiation into harmless heat. Organic UVAs are, however, easily degraded by free radicals produced by photodegradation inside the polymer matrix and are prone to migration in the coating. In this study, commercial UVAs and hindered amine light stabilizers (HALS) entrapped into poly(methyl methacrylate) (PMMA) microspheres and CaCO3 templates coated with UV-responsive polymers were added into clear acrylic water-based coating formulation. Artificial accelerated weathering experiments were performed on each formulation. Raman spectroscopy mapping was performed to visualize the concentration and distribution of UVAs and HALS. This study also presents a comparison of the mechanical properties of coatings obtained by dynamic mechanical analysis. Results showed that coating mechanical properties were improved when using encapsulated UVAs and HALS inside PMMA microspheres. The color change of the wood and coating system was minimized and the production of photo-oxidation compounds in the binder was also limited.
Acknowledgments
The authors are grateful to the Natural Sciences and Engineering Research Council of Canada (NSERC) for the financial support through its IRC No. 461745 and CRD No. 445200 programs as well as the industrial partners of the NSERC Industrial Chair on Eco-Responsible Wood Construction (CIRCERB).
Conflict of interest statement: The authors declare to have no conflicts of interest regarding this article.
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©2019 Walter de Gruyter GmbH, Berlin/Boston
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- Comparison of two encapsulation systems of UV stabilizers on the UV protection efficiency of wood clear coats
Articles in the same Issue
- Frontmatter
- Material properties
- Interpenetrating polymer network adhesive bonding of PEEK to titanium for aerospace application
- NanoSiO2 strengthens and toughens epoxy resin/basalt fiber composites by acting as a nano-mediator
- Structure and properties of PA6-66/γ-aminopropyltriethoxysilane-modified clay nanocomposites prepared by in situ polymerization
- Tribological and mechanical properties of polyamide-11/halloysite nanotube nanocomposites
- Dynamic and creep analysis of polyvinyl alcohol based films blended with starch and protein
- Effect of addition of silicone oil on the rheology of fumed silica and polyethylene glycol shear thickening suspension
- Thermal degradation kinetics of oxo-degradable PP/PLA blends
- Preparation and assembly
- Comparative studies of energy saving polymers and fabrication of high performance transparent polymer by solvent bonding
- Preparation and characterization of poly(lactic acid)/sisal fiber bio-composites under continuous elongation flow
- Graphene oxide modification for enhancing high-density polyethylene properties: a comparison between solvent reaction and melt mixing
- Comparison of two encapsulation systems of UV stabilizers on the UV protection efficiency of wood clear coats
