Fabrication and Characterization of Fluffy Mono-Coated Copper Meshes and their Applications for Oil/Water Separation
Fabrication and Characterization of Fluffy Mono-Coated Copper Meshes and their Applications for Oil/Water Separation
复制标题
DOI：
10.1016/j.colsurfa.2021.126883
复制
发表时间：
2021-05
期刊：
影响因子：
--
通讯作者：
Raza Gulfam;Peng Zhang
中科院分区：
文献类型：
--
作者：
Raza Gulfam;Peng Zhang
具有超疏水-超疏油和超疏水-超亲油润湿性的纹理化金属网已经引起了广泛的关注，特别是用于油/水分离。特别是重力驱动油水分离器的设计需要进一步注意考虑有效网格面积，在该面积处可以避免水屏障的形成。在本文中，蓬松的单层涂层（FMC），一种类似于开棉铃中的棉花的智能单层棕榈酸铁，在三个铜网（FMC-M）上电化学生长，所述铜网的网孔尺寸为~150 μm（FMC-M1）、~250 μm（FMC-M2）和~300 μm（FMC-M3）。在FMC-Ms的有效网格面积下，分离效率在98.1%和99.6%之间变化，而分离通量基本上依赖于油粘度和网格孔径而变化。对于低粘度庚烷油，分离通量据报告分别为62，483 Lm− 2 h −1、26，437 Lm− 2 h − 1和15，390 Lm− 2 h −1，而对于高粘度泵油，FMC-M3、FMC-M2和FMC-M1的分离通量分别为971 Lm− 2 h −1、740 Lm− 2 h − 1和322 Lm− 2 h − 1。此外，水的蒸发接触线动力学与所导出的脱钉力一起进行了研究，特别是推进了对水粘附和油蒸发容易性的物理理解总之，高分离效率，宽范围的分离通量，改进的侵入压力，FMC-Ms的显著特点是循环耐久性强和有希望的抗污垢（盐垢和油垢）特性。
The textured-metallic meshes with superhydrophilic-superoleophobic and superhydrophobic- superoleophilic wetting have captured a widespread attention especially for oil/water separation. In particular, the design of gravity-driven oil/water separator needs further attention considering the effective mesh-area at which water-barrier formation can be avoided. Herein, the fluffy mono-coating (FMC), a smart single layer of iron palmitate resembling cotton-in-open-bolls, is electrochemically grown on three copper meshes (FMC-Ms) varying in mesh-pore sizes of ~150 µm (FMC-M1), ~250 µm (FMC-M2) and ~300 µm (FMC-M3). At the effective mesh-areas of FMC-Ms, separation efficiency varies between 98.1% and 99.6%, while separation flux substantially varies relying on the oil viscosity and mesh-pore size. For low-viscosity heptane oil, separation flux is reported to be 62,483 Lm−2h−1, 26,437 Lm−2h−1and 15,390 Lm−2h−1, while it is 971 Lm−2h−1, 740 Lm−2h−1and 322 Lm−2h−1for high-viscosity pump oil, on FMC-M3, FMC-M2 and FMC-M1, respectively. In addition, the evaporative contact line dynamics of water is studied together with the derived depinning forces, particularly advancing the physical understanding of water adhesion and ease of oil-evaporation (transient self-recovery) from FMC-Ms. In summary, high separation efficiency, a wide range of separation flux, improved intrusion pressure, strong cyclic durability and promising anti-fouling (salt-fouling and oil-fouling) features are the salient traits of the FMC-Ms.