Prontera Carmela T, Sico Giuliano, Montanino Maria, De Girolamo Del Mauro Anna, Tassini Paolo, Maglione Maria G, Minarini Carla, Manini Paola
Department of Chemical Sciences, University of Naples Federico II, via Cintia 4, I-80126 Napoli, Italy.
Laboratory for Nanomaterials and Devices (SSPT-PROMAS-NANO), ENEA-C. R. Portici, Piazzale Enrico Fermi 1, I-80055 Portici (Napoli), Italy.
Materials (Basel). 2019 Jul 11;12(14):2234. doi: 10.3390/ma12142234.
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.
本文采用氧化锌纳米颗粒（ZnONPs）和硬脂酸在柔性塑料基材上制备具有良好防潮性能的疏水涂层。采用快速、高通量、温和且易于操作的加工技术，如喷枪喷涂和凹版印刷，来沉积这些材料的薄膜。本研究结果表明，通过两步印刷沉积法，先沉积ZnONPs层，再沉积硬脂酸层，可获得水接触角为115°的最佳疏水涂层。所有沉积工艺在水蒸气阻隔性能方面均被证明是有效的，达到了0.89 g/m²/天的值，相较于裸基材降低了45%。从低成本和绿色方法实现用于包装应用的功能性涂层的角度来看，这些初步数据非常令人鼓舞。
