Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 295, Issue 2, Pages 130-136Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.200900135
Keywords
coatings; hydrophobicity; nanoparticles; UV protection; wood
Funding
- Federal Ministryfor Economics and Technology (BMWi) [15 301 BR]
- Arbeitsgemeinschaft Industrieller Forschungsvereinigungen
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Nanocomposite UV coatings with adjustable properties for use on wood substrates in outdoor conditions were developed. Nanoscale ZnO was shown to be an efficient light absorber. Coatings were characterized in terms of elongation at brake, residual PI and double bond conversion, universal hardness, transparency, hydrophobicity, and yellowing. Coated samples were artificially weathered and studied with regard to their optical and mechanical properties, as well as to changes in brightness, transparency, hydrophobicity, and water permeability. The prepared wood coatings showed an increased weather fastness and improved optical properties. The suitability for use in outdoor conditions was assured by optimizing the elasticity of the coating and decreasing its water permeability.
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