摘要
针对金属基体超疏水表面制备工艺的适用性,采用电镀镀铜结合化学镀银的方法,经过正十八硫醇修饰后在一些常见金属如铜、铝、镍、不锈钢表面构建了微纳层级结构并实现了稳定的超疏水性。通过接触角测量仪（OCA—20）、场发射扫描电子显微镜（FESEM）和X射线光电子能谱（XPS）表征表面的接触角、形貌结构和镀层成分,并分析恒流镀铜与脉冲镀铜的结构成分差异。结果表明：采用脉冲镀铜-化学镀银的方法经表面修饰构建了葡萄球状及花菜状的微纳米层级结构,水滴接触角约158°,滚动角均在4°以下,其中黄铜基（H62）与铝基（5052）表面滚动角可达0.1°;表面经过划痕法与挫刀法处理后未见镀层及修饰层脱落,结合力较好;pH在1~14范围内进行耐酸碱测试,所得表面具备一定耐腐蚀性。该工艺成本适中、方便快捷、基体适用范围广,具备潜在的工业应用价值。
To build super-hydrophobic surface （SHS） on metallic substrate with a wide range of application, the Cu electroplating and Ag chemical-plating were adopted to construct micro- nano hierarchical structure on common metals like copper, aluminum, nickel and stainless steel, which showed stable super-hydrophobicity after being modified by n-octadecanethiol. The contact angle, microscopic morphology and components of the plating layer were analyzed by OCA--20, FESEM and XPS respectively. The structural and componential differences were also compared between the surfaces by constant-current and pulse-current Cu electroplating. The results show that the hotryoid and cauliflower-like micro-nano hierarchical structure is constructed by pulse-current Cu electroplating and Ag chemical-plating. The contact angle on different substrates reaches 158°, while the sliding angle （SA） keeps less than 4°, among of which the SHS on brass and aluminum has a SA of nearly 0°. The plating layer and modification layer show no detachment in the scratch and filing test, thus indicating a superior adhesion. The acid and alkaline resistant tests are conducted in a wide range of pH from 1 to 14, which show that these surfaces are able to generally resist corrosion. This technique is simple, timesav- ing and pragmatic with a moderate expenditure, thus possesses a good prospect in industrial application.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2015年第5期1-8,共8页
China Surface Engineering
基金
深圳市科技研发基金(ZDSY20120616140826670)
关键词
超疏水
金属基
脉冲电镀
化学镀
superhydrophobicity
metallic substrate
pulse electroplating
chemical plating
作者简介
通讯作者：张谦（1985-），男（汉），工程师，硕士；研究方向：表面工程及冷凝换热；Tel：（0755）26711694；E—mail：zhangq@tsinghua-sz．org
