Park Jeeyin, Lim Taekyung, Yang Keun-Hyeok, Ju Sanghyun, Jeong Sang-Mi
Department of Physics, Kyonggi University, Suwon 16227, Gyeonggi-do, Korea.
Department of Architectural Engineering Graduate School, Kyonggi University, Suwon 16227, Gyeonggi-do, Korea.
Polymers (Basel). 2021 Jan 27;13(3):403. doi: 10.3390/polym13030403.
Plastics are used in cover substrates for billboards, windows, large LED signboards, lighting devices, and solar panels because they are transparent and can be colored and shaped as desired. However, when plastic cover substrates installed in outdoor environments are constantly exposed to harsh conditions such as snow, rain, dust, and wind, their transparency deteriorates owing to watermarks and dust contamination. Herein, we investigated a simple dipping-press coating method that can impart hydrophobicity while maintaining the transparency, regardless of the plastic substrate type. A highly transparent and hydrophobic coating film was formed on a plastic substrate by a two-step process, as follows: (1) application of a polydimethylsiloxane-octadecylamine coating by a dipping process, and (2) embedding (1H,1H,2H,2H-heptadecafluorodec-1-yl) phosphonic acid-aluminum oxide nanoparticles by a thermal press process. The plastic substrates on which the highly transparent and hydrophobic coating film was formed showed 150° or higher hydrophobicity and 80% or higher visible light transparency. The coating method proposed herein can easily impart hydrophobicity and is compatible with any plastic substrate that must maintain prolonged transparency without contamination when exposed to adverse conditions.
塑料被用于广告牌、窗户、大型LED招牌、照明设备和太阳能板的覆盖基板，因为它们是透明的，并且可以根据需要进行着色和塑形。然而，当安装在户外环境中的塑料覆盖基板持续暴露于雪、雨、灰尘和风等恶劣条件下时，由于水印和灰尘污染，它们的透明度会下降。在此，我们研究了一种简单的浸压涂覆方法，该方法可以在保持透明度的同时赋予疏水性，而与塑料基板类型无关。通过以下两步工艺在塑料基板上形成了高度透明且疏水的涂膜：(1) 通过浸涂工艺施加聚二甲基硅氧烷-十八烷基胺涂层，以及(2) 通过热压工艺嵌入(1H,1H,2H,2H-十七氟癸-1-基)膦酸-氧化铝纳米颗粒。形成了高度透明且疏水涂膜的塑料基板表现出150°或更高的疏水性以及80%或更高的可见光透明度。本文提出的涂覆方法可以轻松赋予疏水性，并且与任何在暴露于不利条件时必须保持长时间透明且无污染的塑料基板兼容。
