Abstract

The pollution of water by oil is a global challenge. In this study, the design and fabrication of a superhydrophobic stainless steel mesh are reported. This was achieved through a sample “glue + fly ash” fabrication method. The fly ash was first modified by a stearic acid solution impregnation method. After the modification, the fly ash was then bonded to the surface of a stainless-steel mesh by an epoxy resin solution to obtain the superhydrophobic mesh. The introduction to the modified fly ash endows the mesh with excellent corrosion resistance and superhydrophobicity when compared with the original mesh. The as-prepared mesh could separate various oil and organic solvents from water with a separation efficiency exceeding 98%. Interestingly, the oil separation capacity of the as-prepared mesh still kept a high value after 30 cycles of reuse. The simplicity, eco-friendliness and low cost of this method turn it into a practical and realistic approach to the large-scale fabrication of superhydrophobic surfaces. These properties make the as-prepared mesh an ideal candidate for actual oily wastewater treatment.

摘要

石油对水的污染是一项全球性挑战。在这项研究中，报告了超疏水不锈钢网的设计和制造。这是通过示例“胶水 + 飞灰”制造方法实现的。粉煤灰首先采用硬脂酸溶液浸渍法进行改性。改性后，再将粉煤灰通过环氧树脂溶液粘合在不锈钢网表面，得到超疏水网。改质粉煤灰的引入，使网眼与原网眼相比具有优异的耐腐蚀性和超疏水性。所制备的筛网可以将各种油类和有机溶剂从水中分离出来，分离效率超过98%。有趣的是，所制备的滤网的油分离能力在重复使用 30 次后仍保持较高值。该方法的简单、环保和低成本使其成为大规模制造超疏水表面的实用和现实方法。这些特性使所制备的网成为实际含油废水处理的理想候选者。