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    Author(s): Joseph E. JakesCharles R. FrihartChristopher G. HuntDaniel J.  YelleNayomi PlazaLinda Lorenz; Daniel J. Ching
    Date: 2017
    Source: In: Hunt, C.G.; Smith, G.D.; Yan, N. eds. Proceedings, 2017 international conference on wood adhesives. Peachtree Corners, GA: Forest Products Society. 13 p.
    Publication Series: Paper (invited, offered, keynote)
    Station: Forest Products Laboratory
    PDF: View PDF  (1.0 MB)

    Description

    The development of new and improved wood adhesives is hindered by an incomplete mechanistic understanding of what makes a wood-adhesive bond able to withstand changes in moisture levels. Although common methods are used to test and report the bulk level properties of bondlines, such as bondline shear strength and wood failure analysis, sufficient experimental tools to study wood-adhesive bondlines and the effects of moisture at the nm- to mm-length scales are lacking. Here we review recently developed tools that, when combined, are capable of studying bondlines and the effects of moisture across these length scales. The tools include X-ray computed tomography (XCT), X-ray fluorescence microscopy (XFM), nanoindentation, and small angle neutron scattering (SANS). Their utility has been demonstrated by studying model bondline systems using phenol formaldehyde adhesives. The combined results lead to new insights towards understanding moisture durability in wood-adhesive bondlines and a new model to facilitate the discussion of adhesive penetration into the wood nanostructure.

    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

    Jakes, Joseph E.; Frihart, Charles R.; Hunt, Christopher G.; Yelle, Daniel J.; Plaza, Nayomi; Lorenz, Linda; Ching, Daniel J. 2017. Integrating multi-scale studies of adhesive penetration into wood. In: Hunt, C.G.; Smith, G.D.; Yan, N. eds. Proceedings, 2017 international conference on wood adhesives. Peachtree Corners, GA: Forest Products Society. 13 p.

    Keywords

    Wood adhesive, penetration, moisture, durability

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https://www.fs.usda.gov/treesearch/pubs/56457