硬脂酸醇水溶液浸泡法构建超疏水铝合金表面

Preparation of superhydrophobic aluminum alloy surface by a immersion method using stearic acid in alcohol-water solution

采用简单环保的沸水处理方法使铝合金表面粗糙化,然后经硬脂酸的醇/水溶液浸泡处理而构建得到接触角达155°和滚动角小于5°的超疏水性铝合金表面。通过接触角测量、红外光谱和扫描电镜测试对超疏水铝合金表面的制备过程、表面润湿性能、化学结构和表面形貌等进行了表征和分析。研究结果表明:具有疏水性的烃基长链成功键合到了具有多孔花瓣状微结构的铝合金表面,从而赋予铝合金表面具有超疏水特性。

A superhydrophobic aluminum alloy surface with a contact angle of 155~ and a rolling angle below 5~ was prepared by the following method：firstly, the rough aluminum alloy surface was obtained by a simple green method of trea- ting the alloy in boiling water. Then the alloy was immersed with stearic acid（STA）solution in alcohol-water solution. The preparation process, wettability, chemical composition and morphology of the superhydrophobic surface were investigated by techniques as contact angle measurement, FTIR and SEM, respectively. Results showed that the surface had porous and un even flowerlike structure, and the hydrophobic long alkyl chain was successfully bonded onto the flowerlike surface. As a re- sult, the surface was took superhydrophobicity.