Sustainable, Fluorine-Free, Low Cost and Easily Processable Materials for Hydrophobic Coatings on Flexible Plastic Substrates

Zinc oxide nanoparticles (ZnONPs) and stearic acid are herein used for the preparation of hydrophobic coatings with good moisture barrier property on flexible plastic substrates. Fast, high throughput, mild and easy-to-run processing techniques, like airbrushing and gravure printing, are applied for...

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Bibliographic Details
Published in:Materials 2019-07, Vol.12 (14), p.2234
Main Authors: Prontera, Carmela T, Sico, Giuliano, Montanino, Maria, De Girolamo Del Mauro, Anna, Tassini, Paolo, Maglione, Maria G, Minarini, Carla, Manini, Paola
Format: Article
Language:English
Subjects:
Acids
Coatings
Contact angle
Deposition
Ethanol
Fluorine
Hydrophobic surfaces
Hydrophobicity
Low cost
Morphology
Nanoparticles
Particle size
Polyethylene terephthalate
Stearic acid
Substrates
Thin films
Ultrasonic imaging
Water vapor
Zinc oxide
Zinc oxides
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Summary:Zinc oxide nanoparticles (ZnONPs) and stearic acid are herein used for the preparation of hydrophobic coatings with good moisture barrier property on flexible plastic substrates. Fast, high throughput, mild and easy-to-run processing techniques, like airbrushing and gravure printing, are applied for thin films deposition of these materials. The results of this study indicated that the best hydrophobic coating in terms of water contact angle (115°) is obtained through a two-steps printing deposition of a ZnONPs layer followed by a stearic acid layer. All the deposition procedures proved to be effective in terms of water vapor barrier properties, reaching values of 0.89 g/m /day, with a 45% reduction with respect to the bare substrate. These preliminary data are very encouraging in the perspective of a low cost and green approach for the realization of functional coatings for packaging applications.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12142234