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

Materials

卷:12

CarmelaT. Prontera¹  Paola Manini¹  Paolo Tassini²  MariaG. Maglione²  Carla Minarini²  Giuliano Sico²  Anna De Girolamo Del Mauro²  Maria Montanino² 

[1] Department of Chemical Sciences, University of Naples Federico II, via Cintia 4, I-80126 Napoli, Italy;

[2] Laboratory for Nanomaterials and Devices (SSPT-PROMAS-NANO), ENEA—C. R. Portici, Piazzale Enrico Fermi 1, I-80055 Portici (Napoli), Italy;

关键词: zinc oxide nanoparticles;    hydrophobic coating;    water vapor transmission rate;    green processing;   

DOI  :  10.3390/ma12142234

来源: DOAJ

【 摘 要 】

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/m²/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.

【 授权许可】

Unknown