Plasma surface engineering — innovative processes and coating systems for high-quality products

Suchentrunk, R.; Fuesser, H.J.; Staudigl, G.; Jonke, D.; Meyer, M.

doi:10.1016/s0257-8972(98)00833-0

Cited by 32 publications

(14 citation statements)

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“…The plasma treatments employed here are not suitable for commercial application because they require a high vacuum, and relatively long treatment times. Furthermore, they cannot be easily integrated into a continuous production line, unlike the treatments used to increase the adhesion of paints and inks to plastics [4,5]. However, our results do give pointers on how plasma treatments could be used to modify wood surface properties to improve coating performance.…”

Section: Discussionmentioning

confidence: 97%

“…Plasma is an ionized gas, sometimes known as the "4th state of matter", consisting of atoms, molecules, ions, electrons, and short-lived species that can alter the surface properties of materials, including the surface energy of plastics [1][2][3]. The latter characteristic of plasma is being exploited for a variety of industrial applications, for example, as a pre-treatment to increase the wettability and adhesion of coatings to plastic automotive components such as fenders (bumpers) [4]. Plasma treatments also help, as pointed out by Stecher [5], "to ensure the wettability of inks and the durability of printing on products made from polypropylene, polyethylene, polyamide, polycarbonate, glass, and metals".…”

Section: Introductionmentioning

confidence: 99%

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Plasma Pre-treatments to Improve the Weather Resistance of Polyurethane Coatings on Black Spruce Wood

2018

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We hypothesize that plasma treatments that increase the adhesion and penetration of transparent water, and solvent-borne polyurethane coatings into black spruce wood will improve the performance of coated wood exposed to accelerated weathering. We tested this hypothesis by modifying wood samples with plasma for 30, 180, 600, and 1200 s, and measuring coating penetration and adhesion using light microscopy and a mechanical pull-off test, respectively. Plasma treatment did not improve coating adhesion, but the solvent-borne coating showed deeper penetration into plasma-modified wood, and its resistance to accelerated weathering was better on plasma-modified wood than on untreated controls. Plasma treatments enhanced the penetration of water-borne polyurethane into wood, but the treatments did not improve weather-resistance of the coating. Plasma treatment increased the wettability of wood surfaces, and prolonged plasma treatment etched cell walls, increasing their porosity. These effects may explain the positive effect of plasma treatment on coating penetration, and the increased weather-resistance of the solvent-borne polyurethane on plasma-modified wood. In conclusion, our results indicate that the ability of plasma treatment to improve coating performance on black spruce depends on the coating type, and the effects of the treatment on the surface microstructure of wood.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Plasma Pre-treatments to Improve the Weather Resistance of Polyurethane Coatings on Black Spruce Wood

2018

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“…The performance of coatings on hydrophobic materials such as plastics can be improved by treating the surface of the material with plasma, a reactive mixture of charged particles [1,2]. For example, plasma treatments are widely used by industry as a pre-treatment to increase wettability and adhesion of coatings to plastic automotive components [2,3]. Plasma treatment of wood prior to coating is unnecessary because wood is not normally hydrophobic, but there are exceptions.…”

Section: Introductionmentioning

confidence: 99%

Plasma Treatment Reduced the Discoloration of an Acrylic Coating on Hot-Oil Modified Wood Exposed to Natural Weathering

Jamali

Evans

2020

Coatings

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We test the hypothesis that plasma-treatment will remove oil from the surface of hot-oil modified blue-stained pine wood, and improve the adhesion and outdoor performance of a white acrylic coating on the modified wood. Modified wood was treated with water-vapour plasma, and microstructural changes at wood surfaces were examined. Plasma treatment removed oil from the surface of modified wood and etched bordered pits. The contact angle of water droplets on modified wood was 91.8 • , but plasma-treatment for only 33 s reduced contact angle to less than that of the unmodified control (48.6 • ). The adhesion of the acrylic paint to modified wood was unaffected by plasma-treatment, but the adhesion rating of coated samples tested wet was slightly lower (3.1) than that of the coating on samples tested dry (3.5). The lightness value (CIE-L) of the acrylic coating on hot-oil modified wood samples exposed outdoors for 18 months was significantly lower (darker, 65.5) than that of the coating on similarly modified and exposed samples pre-treated with plasma (75.8). We conclude that plasma-treatment shows promise as a way of removing oil from the surface of hot-oil modified wood and reducing the discolouration of an acrylic coating on modified wood exposed to natural weathering.

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“…Mechanical and environmental properties of the coatings can be improved by e.g. application of dry, vacuum-based coating technologies that have been intensively developed for their use in precision optics or ophthalmology [7,8]. One of the commonly used methods for the preparation of protective thin films is magnetron sputtering.…”

Section: Introductionmentioning

confidence: 99%

Investigation of structural, optical and micro-mechanical properties of (NdyTi1−y)Ox thin films deposited by magnetron sputtering

et al. 2015

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Plasma surface engineering — innovative processes and coating systems for high-quality products

Cited by 32 publications

References 0 publications

Plasma Pre-treatments to Improve the Weather Resistance of Polyurethane Coatings on Black Spruce Wood

Plasma Pre-treatments to Improve the Weather Resistance of Polyurethane Coatings on Black Spruce Wood

Plasma Treatment Reduced the Discoloration of an Acrylic Coating on Hot-Oil Modified Wood Exposed to Natural Weathering

Investigation of structural, optical and micro-mechanical properties of (NdyTi1−y)Ox thin films deposited by magnetron sputtering

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