Contact
    Start Publications From hydrophilic to hydrophobic wood using direct fluorination: ...
    ←  Publication Finder
    Attension

    From hydrophilic to hydrophobic wood using direct fluorination: A localized treatment

    Year: 2018

    Journal: C. R. Chim., Volume 21, AUG, page 800–807

    Authors: Pouzet, Martial; Dubois, Marc; Charlet, Karine; Beakou, Alexis

    Organizations: Conseil regional d'Auvergne

    Keywords: Wood; Silver fir; Wood flour; Fluorination; Hydrophobicity; Mechanical properties

    When controlled by the treatment duration or the quantity of reactive molecules, direct fluorination using F-2 gas is efficient to decrease the hydrophilicity of wood both in the form of massive piece and powder. To prove that silver fir pieces and wood flour (mix of spruce and silver fir species) were investigated as representative examples. In both the cases, hydroxyl groups are converted into C-F bonds resulting in the decrease in affinity for water. Fluorination is mainly located in the outer parts of the wood cell, where the content of lignin is the highest, maintaining the inner ones nonmodified. Because the microstructure is maintained by this location of fluorination, the mechanical properties are conserved for silver fir pieces. The mechanical properties are even enhanced for composite containing fluorinated wood flour because of a better compatibility between the fluorinated fillers and the polyester matrix. (C) 2018 Academie des sciences. Published by Elsevier Masson SAS.
    View publication