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Open AccessArticle

Atmospheric Pressure Plasma Coating of Wood and MDF with Polyester Powder

Laboratory of Laser and Plasma Technologies, University of Applied Sciences and Arts, Von-Ossietzky-Str. 99, 37085 Göttingen, Germany
Wood Biology and Wood Products, Faculty of Forest Sciences, University of Goettingen, Büsgenweg 4, 37077 Göttingen, Germany
Application Center for Plasma and Photonics, Fraunhofer Institute for Surface Engineering and Thin Films, Von-Ossietzky-Str. 100, 37085 Göttingen, Germany
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Mojgan Nejad
Coatings 2017, 7(10), 171;
Received: 21 August 2017 / Revised: 2 October 2017 / Accepted: 10 October 2017 / Published: 17 October 2017
(This article belongs to the Special Issue Wood Coatings)
In this study, polyester powder based on iso- and teraphthalic acid was deposited with an atmospheric plasma jet. The powder was fed into the effluent plasma zone and deposited on European beech wood (Fagus sylvatica L.), Grand fir (Abies grandis Lindl.) and medium density fiberboard (MDF). The substrates were annealed subsequent to the coating process. To exclude decomposition of the polyester layers by the plasma treatment, the surface chemistry of the layers has been examined by X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) and compared with the polyester powder reference. Furthermore, topographical investigations were carried out using laser scanning microscopy (LSM). Adhesive strength of the layers was evaluated by dolly test and gloss measurements with a goniophotometer. The deposited layers showed no chemical changes compared to the reference. The adhesive strength of the layer met practical requirements of >1 MPa. It was demonstrated that the deposition of a macroscopic layer is possible without a pretreatment or the usage of additives. Therefore this coating process by atmospheric pressure plasma for wood and wood based materials could represent an environmental-friendly alternative to conventional coating methods. View Full-Text
Keywords: plasma; wood; MDF; powder; coating; spectroscopy; gloss; adhesion strength plasma; wood; MDF; powder; coating; spectroscopy; gloss; adhesion strength
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Köhler, R.; Sauerbier, P.; Militz, H.; Viöl, W. Atmospheric Pressure Plasma Coating of Wood and MDF with Polyester Powder. Coatings 2017, 7, 171.

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