Abstract In the present study, we have been using a two-step process to create a super-hydrophobic property on the copper surface. We first created micro and nano-scale roughness by applying ZnO layers on the copper surface, then immersion the samples in a PTFE-SiO2 suspension at specific times to reduce the surface energy. We also investigated the effect of silica nanoparticle concentrations, ZnO layer numbers and sample immersion time in the PTFE-SiO2 suspension on the surface hydrophobicity. The morphology and chemical analysis of the coating surface were studied with Field Emission Scanning Electron Microscopy (FESEM) and Infrared Fourier Transform Spectroscopy (FTIR) methods. The water contact angles on the prepared samples were measured by a water contact angle analyzer method. Icing tests were performed at a constant operating temperature of −8 °C. Also, the self-cleaning behavior of the samples was evaluated by an iron oxide powder. The results indicated that the ZnO/PTFE-SiO2 coated copper substrate showed superhydrophobic (CA, 164°), anti-icing (icing time 700 s) and self-cleaning properties.

中文翻译：

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超疏水、自洁、防冰氧化锌/聚四氟乙烯-SiO2纳米复合薄膜的制备

摘要 在目前的研究中，我们一直使用两步法在铜表面上产生超疏水性。我们首先通过在铜表面应用 ZnO 层来创建微米和纳米级粗糙度，然后在特定时间将样品浸入 PTFE-SiO2 悬浮液中以降低表面能。我们还研究了二氧化硅纳米颗粒浓度、ZnO 层数和样品在 PTFE-SiO2 悬浮液中的浸泡时间对表面疏水性的影响。用场发射扫描电子显微镜 (FESEM) 和红外傅立叶变换光谱 (FTIR) 方法研究了涂层表面的形貌和化学分析。通过水接触角分析仪方法测量制备的样品上的水接触角。结冰测试在 -8 °C 的恒定工作温度下进行。此外，通过氧化铁粉末评估样品的自清洁行为。结果表明，ZnO/PTFE-SiO2 涂覆的铜基板表现出超疏水（CA，164°）、抗结冰（结冰时间 700 s）和自清洁性能。