泡沫铜纳米针超疏水表面电化学构建技术及其油水分离特性  

Fabrication of superhydrophobic surfaces on porous copper by electrochemical oxidation and its performance in oil-water separation

作　　者：章雯[1,2] 张爽[1,2] 张友法[1,2] 余新泉[1,2] 

机构地区：[1]东南大学材料科学与工程学院,南京211189 [2]东南大学江苏省先进金属材料高技术研究重点实验室,南京211189

出　　处：《东南大学学报（自然科学版）》2015年第1期69-73,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51101035);苏州市科技发展计划(技术专项)资助项目(ZXG2012020)

摘　　要：采用电化学氧化法,在泡沫铜多孔材料表面构建了纳米针结构.利用扫描电子显微、X射线衍射图谱分析及油水测试方法研究了电流密度对表面微观形貌、组成成分、润湿性和油水分离特性的影响.结果表明,增大电流密度可促进Cu(OH)2纳米针绒毛状微米团簇的生成,形成微纳复合结构,使超浸润性和油水分离特性明显提高.当电流密度为6 m A/cm2时,泡沫铜表面具有微纳复合结构.表面经改性后,水滴的静态接触角为161°,滚动角为7.2°,油滴则在表面完全润湿铺展,油水分离效率高达98%.同时,此改性表面显示出良好的抗水冲击性和耐水压性.The nanoneedle structure was fabricated on porous copper surface by electrochemical oxidation method. The effects of the current density on the microstructure, chemical composition, wettability and oil-water separation property were studied by scanning electron microscopy, X-ray dif- fraction and oil-water test. The results show that the increase of the current density can promote the growth of Cu （OH） 2 nanoneedle villous clusters and the formation of the micro-nano composite struc ture, improving the superwettability and oil-water separation property obviously. Micro-nano composite structure is obtained on porous copper surface under current density of 6 mA/cm^2. The surface with this structure exhibits a static water contact angle of 161 o and a rolling angle of 7.2 ° after modification. In contrast, oil can complete wet on the surface, and the oil-water separation efficiency can reach up to 98%. At the same time, the modified surface shows good properties of resistance to droplets dynamic impacting and water pressure.

关 键 词：泡沫铜 超疏水 超亲油 阳极氧化 油水分离 

分 类 号：O647[理学—物理化学]