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    Author(s): Samuel Zelinka; R. Ringman; A. Pilgard; E. E. Thybring; Joseph Jakes; K. Richter
    Date: 2016
    Source: International Wood Products Journal
    Publication Series: Scientific Journal (JRNL)
    Station: Forest Products Laboratory
    PDF: View PDF  (205.0 KB)

    Description

    Chemical modification of wood increases decay resistance but the exact mechanisms remain poorly understood. Recently, Ringman and coauthors examined established theories addressing why modified wood has increased decay resistance and concluded that the most probable cause of inhibition and/or delay of initiation of brown-rot decay is lowering the equilibrium moisture content. In another recent study, Jakes and coauthors examined moisture-induced wood damage mechanisms, including decay and fastener corrosion, and observed that these mechanisms require chemical transport through wood cell walls. They proposed that chemical transport within wood cell walls is controlled by a moisture-induced glass transition in interconnected networks of hemicelluloses and amorphous cellulose. This paper shows how these models jointly suggest mechanisms by which wood modifications can inhibit brown-rot. Alternative mechanisms are also discussed. These models can be used to understand and further improve the performance of wood modification systems.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Zelinka, Samuel L.; Ringman, Rebecka; Pilgard, Annica; Thybring, Emil Engelund; Jakes, Joseph E.; Richter, Klaus. 2016. The role of chemical transport in the brown-rot decay resistance of modified wood. International Wood Products Journal. 7(2): 66-70.

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    Keywords

    Wood modification, Brown-rot decay, Diffusion, Chemical transport, Percolation theory, Glass transition temperature

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