Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Mandla A TshabalalaSam Williams
    Date: 2008
    Source: PRA’s 6th International Woodcoatings Congress : "preserve, protect, prolong", Amsterdam, The Netherlands, 14-15 October 2008, conference papers. Hampton : PRA Coatings Technology Centre, 2008: 14 p.: ISBN: 9780955131752: 0955131758.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.72 MB)

    Description

    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.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Tshabalala, Mandla A; Williams, R. Sam. 2008. Sol-gel modification of wood substrates to retard weathering. In: PRA’s 6th International Woodcoatings Congress : "preserve, protect, prolong", Amsterdam, The Netherlands, 14-15 October 2008, conference papers. Hampton : PRA Coatings Technology Centre, 2008: 14 p.: ISBN: 9780955131752: 0955131758.

    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

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/39492