Recent research on superhydrophobic/superoleophilic materials is focused on simplified methods of fabrication. In this study, a superhydrophobic surface was prepared by coating a Cu metal sheet with silver nanoparticles by immersion in an aqueous AgNO₃ solution followed by dip-coating with Nafion. The simple fabrication process is completed in less than 40 min. This is significantly faster than most other reported techniques for preparing superhydrophobic/superoleophilic surfaces. The as-prepared coated sample possessed low surface energy and exhibited surface roughness with nano- and micro-hierarchical features. Due to its extreme anti-wetting property, the coating showed protective properties against corrosive media, as evidenced by electrochemical impedance spectroscopy and potentiodynamic polarization measurements. Aside from being able to repel water, the coating, when applied to a Cu metal mesh, also displayed superoleophilicity such that it permitted the passage of oil through the mesh openings. Thus, the coated mesh acts as a separation membrane, which is useful in oil/water separation application.

中文翻译：

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通过化学纳米颗粒沉积和全氟化聚合物改性实现超疏水/超亲油表面

最近对超疏水/超亲油材料的研究集中在简化的制造方法上。在这项研究中，通过浸入 AgNO ₃水溶液中，用银纳米颗粒涂覆 Cu 金属片来制备超疏水表面。溶液，然后用 Nafion 浸涂。简单的制造过程在不到 40 分钟的时间内完成。这比大多数其他报道的用于制备超疏水/超亲油表面的技术要快得多。所制备的涂层样品具有低表面能，并表现出具有纳米级和微米级特征的表面粗糙度。由于其极端的抗润湿性能，该涂层显示出对腐蚀介质的保护性能，电化学阻抗谱和动电位极化测量证明了这一点。除了能够排斥水之外，该涂层在应用于 Cu 金属网时还表现出超亲油性，从而允许油通过网孔。因此，涂层网作为分离膜，