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

    Description

    Stable and durable wood products can be produced by chemical modification at the molecular level. One modification that is effective in achieving these properties is by reacting both hardwoods and softwoods with acetic anhydride. The reaction takes place in the most accessible hydroxyl groups in the cell wall polymers. Lignin reacts the fastest followed by the hemicelluloses. Both are highly substituted. As the level of bonded acetyl increases, dimensional stability increases and attack by fungi decreases. The threshold of fungal resistance is approximately 18% acetyl. The moisture in the cell wall may be too low to support fungal growth. This is a summary of several independent projects on the mechanism of property enhancement that were previously published in proceedings.

    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

    Rowell, R.M.; Ibach, R.E. 2018. Stable and durable wood products based on molecular modification. Journal of Tropical Forest Science. 30(5): 488-495. https://doi.org/10.26525/jtfs2018.30.5.488495.

    Cited

    Google Scholar

    Keywords

    Hardwoods, softwoods, modification, acetylation, stable, durable, swelling, shrinking, decay, performance

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/58834