耐腐蚀超疏水铜网的制备及其在油水分离中的应用

Preparation of Superhydrophobic Cu Mesh with Corrosion Resistance and Applications in Oil-water Separation

针对目前超疏水材料耐腐蚀差的问题,制备一种耐腐蚀的超疏水铜网,并应用于油水混合物的分离。将十八胺修饰的多壁碳纳米管与有机硅改性的水性聚氨酯相结合,喷涂到铜网制备了具有鸟巢状结构的铜基超疏水表面。结果表明,该表面呈现对水高的接触角162°和对油极低接触角0°。另外,可对石油醚/水、四氯化碳/水、甲苯/水、己烷/水、煤油/水等油水混合物高效分离,分离效率均大于93.79%,且具有良好的可循环使用性。耐腐蚀性测试结果表明,该超疏水表面分别在1mol/L的NaOH,HCl,NaCl溶液中浸泡24h后,仍可保持超疏水特性,具有优异的耐腐蚀性能。

In order to solve the existing problem of the poor corrosion resistance of the superhydropho bic materials, a novel type of copper mesh based superhydrophobic materials with outstanding corro sion resistance was prepared and then was applied to the oil/water separation. The octadecylamine modified multi wailed carbon nanotubes was combined with the aminoethylaminopropyl polydimethyl siloxane（AEAPS） modified WPU and one step spray method was adopted to prepare the copper mesh based superhydrophobic surfaces with nest like structure. The as prepared mesh shows both superhy drophobic and superoleophilic properties simultaneously with a high water contact of 162° and an oil contact angle of 0°. Thus, they can be used to separate a series of oil/water mixtures, such as kero sene, toluene, tetrachloromethane, petroleum and hexane with separation efficiency above 93.79% and stable recyclability. In addition, the as prepared mesh can maintain its superhydrophobic property after soaking in corrosive solutions （lmol/L NaOH, HC1, NaC1） for 24h.