耐腐蚀超疏水铜网的制备及其在油水分离中的应用

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。

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

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-walled 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(1mol/L NaOH,HCl,NaCl)for 24h.