室温下ZnO超疏水表面的制备及油水分离性能

Preparation of ZnO superhydrophobic surface at room temperature and oil-water separation performance

摘要:

利用简便的液相法，在室温下于不锈钢网上沉积ZnO纳米片和纳米花粗糙结构，接着通过浸渍法修饰低表面能物质硬脂酸，制备了超疏水不锈钢网。对沉积后的不锈钢网表面形貌、晶体结构、润湿性能、耐磨性能、油水分离性能等进行表征与测定。结果表明，该不锈钢网表面由纳米片和纳米花组成的微纳米结构ZnO构成，具有超疏水性，水接触角161 °；油水分离效率达98%，循环使用20次后分离效率仍保持在95.5%以上；具有良好的机械耐磨性，在高盐环境中表现出化学稳定性。

Abstract:

A simple liquid phase method was used to deposit ZnO nano-sheets and nano-flowers on the stainless steel mesh at room temperature. Then, the superhydrophobic stainless steel mesh was modified by the impregnation method with the low surface energy substance stearic acid. The surface morphology, crystal structure, wettability, wear resistance and oil-water separation performance of the deposited stainless steel mesh were characterized. The results showed that the surface of the stainless steel mesh was composed of micro-nano structure ZnO with nano-sheets and nano-flowers. It was superhydrophobic and had a water contact angle of 161 °. The oil-water separation efficiency was 98%, and the separation efficiency remained at 95.5% after 20 cycles of recycling. It had good mechanical wear resistance and showed chemical stability in high salt environment.