金属基超疏水表面的制备及性能研究进展

本文综述了金属基超疏水材料的研究进展,重点讨论了金属基超疏水表面的主要制备方法,比较了不同制备方法的优缺点。同时,探讨了金属基超疏水表面的各种功能特性,并分析了金属基超疏水表面目前在制备和应用中存在的主要问题。指出金属基超疏水表面未来的重点发展方向是简化制备工艺、降低成本、提高超疏水表面的耐久性和稳定性以及制备具有自修复性能的金属超疏水表面。     

长效超疏水铜表面的构建及耐磨性和自清洁性能

改善超疏水表面的普适性、稳定性和耐磨性是超疏水材料实用化的前提。本研究通过水热反应和表面修饰成功制得接触角达156.2°、滚动角为3~4°的铜基超疏水表面。利用接触角测量、扫描电镜观察、XRD测试、红外光谱和EDS分析对超疏水铜表面的润湿性能、表面微结构、相结构和化学结构进行了分析表征。结果表明:所制备的超疏水表面是由大量Cu₂S晶粒堆积形成的微纳米二元结构及接枝的疏水长链构成,二者共同赋予铜基超疏水表面广泛的普适性和良好的稳定性。同时,该超疏水表面具有良好的耐磨性和优异的自清洁性能。本工作对此项性能产生的原因和机理进行了分析探讨,以期为超疏水材料在实际生产和生活中的应用奠定基础。     

Comparative Study of Structure and Property Changes in Corrosive Media for Self-cleaning Superhydrophobic Magnesium Alloys

Magnesium alloys with superhydrophobicity are constructed by controlling rough surface structure and grafting long hydrophobic alkyl chains. Changes of morphology, phase structure, chemical composition as well as wettability, corrosion resistance of superhydrophobic magnesium alloy upon immersing in corrosive media are investigated comparatively. Meanwhile, the contaminating particles on as-prepared superhydrophobic surfaces can be taken away easily by rolling water droplets. Therefore, the results show that as-prepared superhydrophobic magnesium alloys exhibit enhanced corrosion resistance and self-healing performance. Finally, anti-corrosion and self-cleaning mechanisms are deduced. It can be concluded that it is an effective strategy of preparing superhydrophobic surfaces for improving the corrosion resistance and selfcleaning performance of magnesium alloys.