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Wood Science and Technology

Erschienen in:

14.09.2017 | Original

Deposition of fluorocarbon groups on wood surfaces using the jet of an atmospheric-pressure dielectric barrier discharge

verfasst von: O. Levasseur, M. Vlad, J. Profili, N. Gherardi, A. Sarkissian, L. Stafford

Erschienen in: Wood Science and Technology | Ausgabe 6/2017

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Abstract

This work reports the functionalization of sugar maple (Acer saccharum) wood surfaces following their exposure to the jet of an atmospheric-pressure dielectric barrier discharge operated in either Ar or N₂ with C₃F₈ (octafluoropropane) as the growth precursor for plasma-enhanced chemical vapour deposition. Analysis of the current–voltage characteristics (I–V) revealed a filamentary behaviour in all conditions. While more intense current peaks were observed after addition of C₃F₈ in Ar, a decrease in the discharge current was seen in N₂/C₃F₈ plasmas. Optical emission spectroscopy showed the apparition of a CF₂ ⁺ continuum and CF₂ rovibrational bands between 225 and 350 nm with increasing applied voltage and precursor concentration in the Ar plasmas; a feature ascribed to the presence of plasma-generated C₃F₈ fragments. In such conditions, water contact angle (WCA) measurements indicated that freshly sanded wood samples became highly hydrophobic, with WCAs in the 140° range and excellent dimensional stability for a period of up to 125 days. X-ray photoelectron spectroscopy revealed that such behaviours result from the deposition of highly hydrophobic CF_x groups on the surface. On the other hand, no increase in surface hydrophobicity was observed following exposure to the jet of N₂/C₃F₈ plasmas, probably due to their much lower precursor fragmentation levels.

Vorheriger Artikel Biosorption (removing) of Cd(II), Cu(II) and methylene blue using biochar produced by different pyrolysis conditions of beech and spruce sawdust

Nächster Artikel Desulfurization of black liquor soap for production of crude tall oil with lower sulfur content

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Titel: Deposition of fluorocarbon groups on wood surfaces using the jet of an atmospheric-pressure dielectric barrier discharge
verfasst von: O. Levasseur
M. Vlad
J. Profili
N. Gherardi
A. Sarkissian
L. Stafford
Publikationsdatum: 14.09.2017
Verlag: Springer Berlin Heidelberg
Erschienen in: Wood Science and Technology / Ausgabe 6/2017
Print ISSN: 0043-7719
Elektronische ISSN: 1432-5225
DOI: https://doi.org/10.1007/s00226-017-0958-x

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