氧化锌超疏水薄膜的制备及其耐久性

为了提高氧化锌(ZnO)纳米疏水膜层在实际应用中的耐久性能,采用水热法在铝基底表面制备出微纳米结构的ZnO超疏水薄膜,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和接触角测量仪对所得ZnO薄膜的成分、微观结构及润湿性能进行分析;利用UMT摩擦磨损试验机对薄膜的摩擦性能和机械疏水耐久度进行研究;并用CHI660E电化学工作站对超疏水试样在海水中的耐腐蚀性能进行测量分析。结果表明:制备的微纳米结构ZnO薄膜具有超疏水性,在未经低表面能物质改性的情况下,对水的静态接触角高达152°,滚动角仅为2°;摩擦磨损测试表明该薄膜在经过2 400磨损周期后仍能保持较高的静态接触角;电化学阻抗谱和Tafel曲线测试表明,该薄膜的确降低了铝在海水中的腐蚀速率,缓蚀率高达93.8%。

Fabrication of ZnO Superhydrophobic Surface and Its Durability

ZnO super-hydrophobic films with nanostructure were prepared on aluminum substrates by hydrothermal method.The component,microstructure and wettability of ZnO films were characterized by X-ray diffraction (XRD),scanning electron microscope (SEM) and contact angle measurement.The friction performance and mechanical hydrophobic durability of the films were investigated by UMT friction and wear test machine.Moreover,the corrosion resistance of super-hydrophobic samples in seawater was investigated by CHI660E electrochemical workstation.Results showed that the prepared ZnO nano-films were super-hydrophobic,and without surface modification by low surface energy materials,the films possessed static contact angle of 152° and rolling angle of 2°.The friction and wear test showed that after 2 400 wear cycles,the substrates still remained high static contact angle.Besides,the electrochemical impedance spectroscopy and potentiodynamic polarization curves showed that the corrosion rate of Al with super-hydrophobic surface decreased dramatically,and the inhibition rate could reach 93.8 ％.