Influence of atmospheric pressure plasma jet and diffuse coplanar surface barrier discharge treatments on wood surface properties: A comparative study

Beech and larch substrates were successfully treated by an atmospheric pressure plasma jet (APPJ) or a diffuse coplanar surface barrier discharge (DCSBD) system. Applying both technologies on wood, more hydrophilic properties were achieved, potentially by the degradation of hydrophobic extractives,...

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Bibliographic Details
Published in:Plasma processes and polymers 2018-10, Vol.15 (10), p.n/a
Main Authors: Gerullis, Sven, Kretzschmar, Björn Sten‐Mark, Pfuch, Andreas, Beier, Oliver, Beyer, Mario, Grünler, Bernd
Format: Article
Language:English
Subjects:
Aging (natural)
Atmospheric pressure
atmospheric pressure plasma
Beech
Comparative studies
diffuse coplanar barrier discharge
Functional groups
Morphology
Plasma
plasma jet
Plasma jets
Scanning electron microscopy
Substrates
surface characterization
Surface properties
Surface roughness
wood
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Summary:Beech and larch substrates were successfully treated by an atmospheric pressure plasma jet (APPJ) or a diffuse coplanar surface barrier discharge (DCSBD) system. Applying both technologies on wood, more hydrophilic properties were achieved, potentially by the degradation of hydrophobic extractives, the generation of polar functional groups and a modification of surface roughness. Comparing both plasma systems, the hydrophilization effect was stronger using the APPJ. The formation of polar groups on the surface was detected by X–Ray photoelectron spectroscopy. Investigated by scanning electron microscopy, APPJ further showed a more distinct impact on surface morphology compared to DCSBD. Following natural aging, plasma treatment effects such as hydrophilicity were partially reduced and the recovery was more pronounced for larch wood compared to beech. Two different plasma sources were applied to modify the surfaces of wood surfaces. Moreover, the influences of such treatment on the wettability, morphology, chemical changes and pH value were characterized and are reported in this publication. Differences between both plasma systems were found and a comparison in respect of treatment efficiency and wood surface properties is also presented.
ISSN:1612-8850
1612-8869
DOI:10.1002/ppap.201800058