Facile preparation of superhydrophobic metal meshes with micro-hierarchical structure via in situ self-assembly metal-organic framework for efficient oil-water separation
Superhydrophobic materials with micro-hierarchical structure are widely in oil-water separation. However, the environmental suitability and stability of material are still a challenge. To overcome this problem, a novel superhydrophobic Cu-MOF based copper mesh was prepared by first using chemical oxidation to obtain Cu(OH) 2 nanoarrays on copper substrate, then metal-organic framework (Cu-MOF) crystals were in situ grown using Cu(OH) 2 as a sacrificial template, and follow treated with methylpolysiloxane (PDMS). The wetting behavior, surface morphology and physical structure of the modified copper mesh were characterized by the SEM, XRD , FTIR, XPS and WCAs test. The results show that the assembled nanoarrays and deposited crystal particle exhibit a more stable three-dimensional rough structure, which adapted to the harsh oil-water separation environment. The obtained superhydrophobic modified copper mesh (WCA = 156.2°) has a high separation efficiency (96%–99%) and oil flux (2.1–7.3 L m −1 s −1 ) for different types of oil-water mixtures, and good repeatability. Based on in situ growth strategy and gentle preparation process, the as-prepared functional copper mesh with a low-cost and high-performance has great potential in oil-spill repairment and efficient separation of organic liquids.
危险品化学品经营许可证（带存储）