海洋环境中具有良好耐腐蚀性能的环保膨胀石墨掺杂ZnO超疏水涂层的研究

采用超疏水方法设计和制造无氟海洋防腐材料是一个巨大的挑战。本研究将改性膨胀石墨(EAG)与纳米氧化锌(ZnO)结合制备了一种环保型复合涂层。该涂层具有超疏水性和良好的耐腐蚀性。利用傅里叶变换红外光谱(FITR)、x射线衍射(XRD)和扫描电子显微镜(SEM)对涂层的制备过程进行了表征。分析了ZnO、EAG和EAG@ZnO三种复合涂层的表面粗糙度、水接触角、耐蚀性、自洁性和防污性。ZnO与EAG的结合使复合涂层具有较大的水接触角，形成了超疏水表面。电化学结果表明，超疏水EAG@ZnO涂层具有更大的电容弧直径和电荷转移电阻，表明其耐腐蚀性增强。同时，通过固体和液体污染物测试，EAG@ZnO涂层也表现出良好的自清洁和防污性能。

Designing and manufacturing fluorine-free marine anticorrosive materials via superhydrophobic methods poses a significant challenge. In this study, an environmentally friendly composite coating was prepared by combining modified expanded graphite (EAG) with nano-zinc oxide (ZnO). This coating exhibits superhydrophobicity and excellent corrosion resistance. The preparation process of the coating was characterized using Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). The surface roughness, water contact angle, corrosion resistance, self-cleaning property, and antifouling property of three composite coatings (ZnO, EAG, and EAG@ZnO) were analyzed. The combination of ZnO and EAG endows the composite coating with a large water contact angle, forming a superhydrophobic surface. Electrochemical results demonstrate that the superhydrophobic EAG@ZnO coating has a larger capacitive arc diameter and charge transfer resistance, indicating enhanced corrosion resistance. Meanwhile, the EAG@ZnO coating also exhibits excellent self-cleaning and antifouling performance when tested with solid and liquid contaminants.