浸泡法快速制备超疏水黄铜表面  

Fast Fabrication of Super-hydrophobic Brass Surface Using Solution Immersion Method

作　　者：胡海豹[1] 陈立斌[1] 黄苏和[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《上海交通大学学报》2013年第8期1271-1274,1281,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金重点项目(50835009);国家自然科学基金项目(51109178);陕西省自然科学基础研究计划项目(2010JQ1009);高等学校博士学科点专项科研基金(20116102120009)

摘　　要：采用化学蚀刻和溶液浸泡相结合的方法制备具有超疏水性的黄铜表面.按比例配置HCl、HNO3和HF的混合溶液蚀刻黄铜,蚀刻后用硬脂酸溶液进行修饰以获得接触角大于150°的表面.通过扫描电镜对表面结构的观察以及能谱分析,发现蚀刻后的表面具有片状和微小乳突组成的微/纳二级结构,修饰后的这些结构可以捕获大量空气.根据Cassie模式的计算方程,水滴与空气的接触面积约占总接触面积的94.11%.实验研究了不同蚀刻时间对试件表面润湿性的影响,理论分析微结构的形成机理.发现最佳制备条件为:蚀刻时间5min,浸泡时间1h,此条件下制备的试件的接触角达到164.5°.A chemical etching method combined with solution immersion was developed to fabricate superhydrophobic brass surface. HC1, HNO3 and HF were mixed according to a certain percentages in the solution to etch brass which was treated with stearic acid. Inspected with scanning electron microscope, the etched surface morphology was found formed with double scales of hierarchical sheeted and papillary structures which could store lots of air. According to Cassie function, about 94.11% of the contact proportion is between water and air cushion. This research studied the effect of different etching time and analyzed the formation mechanism of these nano-structures. The best fabrication conditions were： 5 min of etching time and lh of immersion time, which made the surface to have a WCA of 164.5°.

关 键 词：化学蚀刻 超疏水 硬脂酸 微结构 

分 类 号：TB43[一般工业技术]