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Title: Sol-Gel Modification of Wood Substrates to Retard Weathering

Source: In: PRA's 6th international Woodcoatings congress, Perserve, Protect, Prolong. 2008 October 14-15. Amsterdam, Netherlands. Paper 35: 1-14; 2009

Author(s)Tshabalala, Mandla A.; Williams, R. Sam

Publication Year: 2009  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4707-1A

Abstract: Wood specimens were treated with sol-gel systems based on metalorganic precursors of silicon (Si), iron (Fe), zirconium (Zr), and titanium (Ti). The effect of these sol-gel systems on weathering properties of wood was investigated. These sol-gel systems were found to have a positive effect on surface color stability and water vapor resistance of the specimens. Under accelerated weathering conditions, the sol-gel systems retarded the degradation of the wood fiber. Scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDXA), after accelerated weathering in a Weather-Ometer showed a marked difference between the treated specimens and the controls in the pattern and localization of degradation. Although the controls showed severe micro-fracturing of the cell walls, the treated specimens showed no such micro-fracturing. On the contrary, the sol-gel-treated specimens showed micro-checks that were predominantly confined to weak areas of the cell wall, such as fusiform rays and the tracheid interfaces.

Keywords: Wood surfaces, wood deterioration, coatings, deterioration, thin films, moisture, water repellents, wood moisture, surface chemistry, weathering, titanium, color-fading, ultraviolet radiation, zirconium, stabilizing agents, plant cell walls, iron, silicon, accelerated life testing, scanning electron microscopy, sol-gel deposition, moisture content, durability, exposure tests, discoloration, titanium compounds, photodegradation, photostabilization, surface properties, accelerated testing, Energy dispersive x-ray analysis

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 1,758 kb(s)

Date posted: 10/06/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 31190
Current FPL Scientist associated with this product
Tshabalala, Mandla A.
Research Chemist
  

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