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ZnO‐Based UV Nanocomposites for Wood Coatings in Outdoor Applications
Author(s) -
Weichelt Franziska,
Emmler Rico,
Flyunt Roman,
Beyer Evelin,
Buchmeiser Michael R.,
Beyer Mario
Publication year - 2010
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200900135
Subject(s) - materials science , nanocomposite , composite material , coating , elongation , air permeability specific surface , layer (electronics) , ultimate tensile strength
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.