Developing a facile strategy for high-efficiency mixture separating is highly necessary, especially for the purification of oily wastewater and the refinement of organic solvents. In this work, robust superhydrophobic meshes (Cu@E-Zn@SA) with ribbon-shaped coating and controllable pore size were prepared via the electrodeposition of laminated Zinc coating, further moisture etching and post-modification with stearic acid. In particular, the moisture etching process, which was facile and environment-friendly, were applied to form the rough petaliform structure and adjust the pore size. Through carefully coordinated regulating the electrodeposition time, moisture etching time and post-modification process, the average pore size of the mesh could be precisely tuned in the range from 38 μm to 6 μm. The influences of the textured roughness and chemical composition on the surface wettability were systematically investigated. The Cu@E-Zn@SA exhibited superhydrophobicity with water contact angles of larger than 150° and sliding angles of lower than 8°. Besides, the Cu@E-Zn@SA could maintain their superhydrophobicity after sandpaper abrasion and sand impact for 50 cycles, displaying remarkable environmental durability and mechanical robustness. Moreover, the prepared superhydrophobic meshes could be applied for the on-demand separation of the oil-water immiscible mixture and water-in-oil emulsions with high efficiencies over 99.3%. Thus, these findings may provide insights in constructing robust superwetting metallic meshes with great application potential in oil-water separation.

迫切需要开发一种高效的混合物分离策略，特别是对于含油废水的净化和有机溶剂的净化。在这项工作中，通过电沉积层合锌涂层，进一步的湿法蚀刻和硬脂酸后改性，制备了具有带状涂层且孔径可控的坚固的超疏水网（Cu @ E-Zn @ SA）。特别地，湿法蚀刻工艺是方便且环保的，用于形成粗糙的花瓣状结构并调节孔径。通过仔细协调地调节电沉积时间，湿气蚀刻时间和后改性过程，可以将网孔的平均孔径精确地调整在38μm至6μm的范围内。系统地研究了织构粗糙度和化学成分对表面润湿性的影响。Cu @ E-Zn @ SA表现出超疏水性，水接触角大于150°，滑动角小于8°。此外，Cu @ E-Zn @ SA可以在砂纸磨蚀和沙击50次后保持其超疏水性，表现出显着的环境耐久性和机械强度。此外，所制备的超疏水筛网可用于按需分离油-水不混溶混合物和油包水乳液，效率高达99.3％。因此，这些发现可为构建坚固的超湿金属网提供深刻的见解，在油水分离方面具有巨大的应用潜力。