Large-scale fabrication of durable and robust super-hydrophobic spray coatings with excellent repairable and anti-corrosion performance
Large-scale fabrication of durable and robust super-hydrophobic spray coatings with excellent repairable and anti-corrosion performance
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DOI：
10.1016/j.cej.2019.02.093
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发表时间：
2019-07-01
影响因子：
15.1
通讯作者：
Zhao, Zheng-Xue
中科院分区：
文献类型：
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作者：
Li, Da-Wei;Wang, Hui-Yuan;Zhao, Zheng-Xue
超疏水涂层的制备工艺复杂、改性成本高、耐久性差等缺点制约了其实际应用。在本文中，我们提出了一种简单而廉价的方法来制造一个强大的超疏水涂层喷涂无氟悬浮液组成的环氧树脂（EP），聚二甲基硅氧烷（PDMS），和改性二氧化硅在各种基板上。该涂层表现出优异的超疏水性，接触角为159.5度，滑动角为3.8度。所制备的超疏水EP + PDMS@SiO2涂层在暴露于苛刻条件（包括在沸水中浸泡2 h或液氮中浸泡1 h、强UV辐射48 h和强化学腐蚀）后仍保持超疏水性。此外，所得超疏水涂层可经受各种机械耐久性实验，例如刮刀后的胶带剥离、手揉和100次砂纸磨损循环。此外，所制备的涂层还表现出对O-2等离子体蚀刻的自修复能力，在空气和油条件下优异的自清洁性和优异的防腐蚀性能。我们相信，这种简单、环保的方法在众多领域的大规模实际应用中具有巨大的潜力。
Some drawbacks such as complicated preparation processes, more expensive modification, and lack of durability have restricted the practical applications of super-hydrophobic coatings. In this paper, we present a simple and inexpensive approach to fabricating a robust super-hydrophobic coating by spraying a fluorine-free suspension composed of epoxy resin (EP), polydimethylsiloxane (PDMS), and modified SiO2 on various substrates. This coating exhibited excellent super-hydrophobicity with a contact angle of 159.5 degrees and a sliding angle of 3.8 degrees. The as-prepared super- hydrophobic EP + PDMS@SiO2 coating retained super-hydrophobicity after exposure to harsh conditions including immersion in boiling water for 2 h or liquid nitrogen for 1 h, intense UV radiation for 48 h, and intense chemical corrosion. Moreover, the resulting super- hydrophobic coating can withstand various mechanical durability experiments such as tape peeling after knife scraping, hand kneading, and 100 sandpaper abrasion cycles. Furthermore, the fabricated coatings also exhibit a self-healing ability against O-2 plasma etching, excellent self-cleaning in air and oil conditions and outstanding anti-corrosion performance. We believe that this easy, environmentally friendly method has great potential for large-scale practical applications in numerous fields.