PVDF surfaces with stable superhydrophobicity
PVDF surfaces with stable superhydrophobicity
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DOI：
10.1016/j.surfcoat.2013.02.004
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发表时间：
2013-05
影响因子：
5.4
通讯作者：
Fajun Wang;Changquan Li;Z. Tan;W. Li;J. Ou;Xue Mingshan
中科院分区：
文献类型：
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作者：
Fajun Wang;Changquan Li;Z. Tan;W. Li;J. Ou;Xue Mingshan
通过使用砂纸的简单粗糙化方法在纯聚偏氟乙烯（PVDF）基底上产生粗糙表面。经氟烷基硅烷改性后，PVDF表面呈现出超疏水性，在酸性和碱性条件下对纯水和水溶液的接触角均大于160°，滑动角均小于5°。此外，该表面在超声波清洗、有机溶剂和无机水溶液浸泡、温度变化和紫外光照射等环境中均具有稳定的超疏水性。PVDF表面的低表面能涂层的稳定性是由PVDF表面的粗糙结构与涂层的连续粗糙结构之间存在的强机械互锁作用解释的。
Rough surfaces on pure polyvinylidene fluoride (PVDF) substrate were created via a simple roughening method using sandpaper. After modification with fluoroalkylsilane, the rough surface of PVDF exhibits superhydrophobicity, with contact angle larger than 160° and sliding angle lower than 5° not only for pure water but also for aqueous solutions under both acidic and basic conditions. In addition, the as-prepared surface possesses stable superhydrophobicity in various environments, such as ultrasonic cleaning, immersion in various organic solvents and inorganic aqueous solutions, temperature variation and UV irradiation. The stability of the low surface energy coating on the surface of PVDF was interpreted by the strong mechanical interlock interaction existing between the rough surface of PVDF and the continuous rough structures of the coating.