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Title: Photostability and moisture uptake properties of wood veneers coated with a combination of thin sol-gel films and light stabilizers

Source: Holzforschung, Volume 65, pp. 215-220, 2011

Author(s)Tshabalala, Mandla A.; Libert, Ryan; Shaller, Christian M.

Publication Year: 2011  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4707-1A

Abstract: In recent years, there has been increased interest in the use of inorganic UV blocking nanoparticles for photostabilization of wood surfaces. Photostability and moisture uptake properties of wood veneers coated with a combination of hybrid inorganic-organic thin sol-gel films and organic light stabilizers was investigated. The light stabilizers were applied by brushing, and the thin sol-gel films were deposited on the wood surface by dipping in a sol prepared from a mixture of methyltrimethoxysilane, hexadecyltrimethoxysilane, and aluminum isopropoxide precursors. Although the sol-gel film improved the moisture resistance of the wood veneers, it showed mixed results on photostability. Under light and spray conditions in a Weather-Ometer™, specimens treated with a combination of sol-gel thin film and a UV absorber, tris-resorcinol triazine and an acrylic self-crosslinking binder, or treated with lignin stabilizer/tris-resorcinol triazine/acrylic self-crosslinking binder showed good overall weathering performance. Under permanent light conditions in the Weather-Ometer™, specimens treated with a combination of sol-gel thin film, a lignin stabilizer, and a water soluble UV absorber - namely: (2-hydroxyphenyl)-benzotriazole - revealed a good overall weathering performance. This study has demonstrated the feasibility of using a combination of organic light stabilizers and sol-gel deposits of hybrid inorganic-organic thin films to improve weathering resistance of softwood substrates.

Keywords: Wood surfaces, wood deterioration, coatings, thin films, moisture, water repellents, wood moisture, surface chemistry, weathering, color fading, ultraviolet radiation, veneers, veneering, aluminum, crosslinking, lignin, resorcinol, Pinus radiata, sol-gel deposition, moisture content, methyltrimethoxysilane, resistance to decay, wood decay, durability, discoloration, photostabilizers, hexadecyltrimethoxysilane, aluminum isopropoxide, softwoods, radiata pine, hybrid inorganic-organic thin films, light stabilizers, sol-gel precursors, UV absorber, weathering, wood coatings

Publication Review Process: Formally Refereed

File size: 215 kb(s)

Date posted: 05/16/2011

This publication is also viewable on Treesearch:  view
RITS Product ID: 39103
Current FPL Scientist associated with this product
Tshabalala, Mandla A.
Research Chemist
  

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