Abstract Superhydrophobic surface has potential applications in various fields due to its excellent water repellency. In particular, fluorine-free superhydrophobic film has attracted extensive attentions. In this study, an eco-friendly and rewritable superhydrophobic coating is successfully prepared by a simple spray-coating method. Hydrophilic silica nanoparticles are immobilized on a substrate by water-soluble polyvinyl alcohol (PVA), and then the surface is further modified by polydimethylsiloxane (PDMS) to obtain a superhydrophobic coating. The prepared coating has a water contact angle of 160o, and exhibits good stability. Most importantly, when the superhydrophobic coating is no longer needed, it can be removed and the substrate can be reused. The eco-friendly and rewritable superhydrophobic coating should have promising potentials in daily life.

中文翻译：

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使用水溶性聚乙烯醇制造的可重写超疏水涂层

摘要 超疏水表面由于其优异的拒水性在各个领域具有潜在的应用前景。特别是无氟超疏水薄膜引起了广泛的关注。在这项研究中，通过简单的喷涂方法成功制备了一种环保且可重写的超疏水涂层。亲水性二氧化硅纳米粒子通过水溶性聚乙烯醇（PVA）固定在基材上，然后通过聚二甲基硅氧烷（PDMS）进一步修饰表面，获得超疏水涂层。制备的涂层水接触角为160°，稳定性好。最重要的是，当不再需要超疏水涂层时，可以将其去除，基材可以重复使用。