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

机译:柔性塑料基材上疏水涂层的可持续无氟低成本和易加工材料

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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.
机译:氧化锌纳米粒子(ZnONPs)和硬脂酸用于制备在柔性塑料基材上具有良好防潮性能的疏水涂层。快速,高产量,温和且易于运行的处理技术(如喷枪和凹版印刷)被用于这些材料的薄膜沉积。这项研究的结果表明,就水接触角(115°)而言,最好的疏水涂层是通过两步印刷沉积ZnONPs层,然后是硬脂酸层获得的。事实证明,所有沉积程序在水蒸气阻隔性能方面都是有效的,达到0.89 g / m 2 /天的值,相对于裸露的基材减少了45%。从实现包装应用功能性涂料的低成本和绿色方法的角度来看,这些初步数据令人鼓舞。

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