基于超疏水超亲油铜网的小型浮油分离器的制备和性能

Preparationand Properties of a miniature Separator for Oil Spill Based on Superhydrophobic and Superoleophilic Copper Meshes

以紫铜网为原料,使用硝酸银水溶液浸泡法在铜网表面形成亚微米级粗糙结构,然后使用正十二硫醇修饰降低表面能后得到了具有超疏水超亲油性能的铜网样品。使用扫描电镜观察了样品表面的微观形貌,使用X射线光电子能谱分析了样品表面的化学组成。将超疏水超亲油铜网折叠成方形小盒后得到了一种简单的小型浮油分离器并研究了其对水面浮油的分离能力。结果发现这种小型油水分离器能够实现对水面浮油的高选择性、高速和高效率分离,10次分离循环后其分离效率仍高达93%,具有优异的重复性分离能力,并能实现浮油回收。另外,超疏水超亲油铜网材料具有优异的化学稳定性,能够长期与油类物质和模拟海水接触,且能承受18.9 cm的水柱压力。

Superhydrophobic and superoleophilic copper mesh was prepared by immersing copper mesh in Ag NO3 aqueous solution to form a rough silver- particles- coated surface,followed by the modification with n- dodecanethiol to lower the surface energy of the surface.The surface microstructures of the sample were observed using scanning electron microscope（SEM）and the surface chemical composition was measured with X- ray photoelectron emission microscopy（XPS）.A miniature separator for oil spill was fabricated from the superhydrophobic and superoleophilic copper mesh and its oil separation ability from the water surface was investigated.The results indicate that the miniature separator exhibits high selectivity,high separation speed and efficiency,and excellent repeatability.The separation efficiency is higher than 93% after 10 cycles of separation,and the separated oils can be recovered conveniently.In addition,the superhydrophobic and superoleophilic copper mesh is stable after immersed in oil and simulated sea water separately for a long period of time.Moreover,the water pressure resistance of the mesh is as high as 18.9 cm water column.