A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
New properties for wood by plasma treatment
In textile industries, plasma (partially ionised gas, containing charged and neutral particles including: electrons, positive or negative ions, radicals, excited atoms, and molecules) technology is used to make fibres water-repellent, fluorinated monomers or silicone products polymerise under the effect of plasma. A invisible microfilm is created on the fibres, which are thus protected against water. The aim of this study is to transpose this technology to wood in order to make it waterproofed and to protect it when used outdoors. Different plasma treatments on bare wood and coated wood are presented: fluorine in gaseous phase, fluorine in liquid phase and silicone in gaseous phase. As the plasma coating is invisible, the unfinished and natural wood appearance so sought after by architects is retained when the treatment is applied to bare wood. Applied on coated wood, the treatment allows to extend the service life of the coating. Artificial weathering tests have shown that best results were obtained in liquid fluorine. Better results could probably obtained by a selection of treatment parameter directly on coated wood samples. By protecting wood from moisture, the micro-film has been envisaged as a barrier against brown rot fungi. But the plasma treatments did not provide any preventive protection against Basidiomycetes. This treatment may have many applications, for example for coated wooden windows, window sills and bottom beads, which are particular sensitive to weathering.
New properties for wood by plasma treatment
In textile industries, plasma (partially ionised gas, containing charged and neutral particles including: electrons, positive or negative ions, radicals, excited atoms, and molecules) technology is used to make fibres water-repellent, fluorinated monomers or silicone products polymerise under the effect of plasma. A invisible microfilm is created on the fibres, which are thus protected against water. The aim of this study is to transpose this technology to wood in order to make it waterproofed and to protect it when used outdoors. Different plasma treatments on bare wood and coated wood are presented: fluorine in gaseous phase, fluorine in liquid phase and silicone in gaseous phase. As the plasma coating is invisible, the unfinished and natural wood appearance so sought after by architects is retained when the treatment is applied to bare wood. Applied on coated wood, the treatment allows to extend the service life of the coating. Artificial weathering tests have shown that best results were obtained in liquid fluorine. Better results could probably obtained by a selection of treatment parameter directly on coated wood samples. By protecting wood from moisture, the micro-film has been envisaged as a barrier against brown rot fungi. But the plasma treatments did not provide any preventive protection against Basidiomycetes. This treatment may have many applications, for example for coated wooden windows, window sills and bottom beads, which are particular sensitive to weathering.
New properties for wood by plasma treatment
Podgorski, Laurence (author) / Schambourg, Francoise (author) / Maguin, Jacques (author) / Chevet, Bruno (author)
2005
8 Seiten, 4 Bilder, 4 Tabellen, 10 Quellen
Conference paper
English
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