材料科学
超亲水性
润湿
接触角
制作
吸附
纳米技术
试剂
表面能
去湿
莲花效应
润湿转变
化学工程
复合材料
有机化学
医学
替代医学
原材料
化学
工程类
病理
作者
Shengteng Zhao,Hong‐Bin Du,Zhichao Ma,Guolin Xiao,Jize Liu,Yue Jiang,Song Hu,Hongwei Zhao,Cuié Wen,Ren Liu
标识
DOI:10.1016/j.matdes.2022.111145
摘要
Efficiently obtaining ideal superhydrophobic metallic surfaces through traditional laser ablation is still a challenge. Meanwhile, revealing the mechanism of the transition from superhydrophilic to superhydrophobic of laser-ablated metallic surfaces is required. Inspired by the lotus leaf, we fabricated the arrays of micro-protrusions on aluminum substrates by nanosecond laser ablation. A layer of hydrophobic species was formed on the micro-protrusions after organic adsorption process, which promoted the surface to obtain superior superhydrophobic, anti-wetting and self-cleaning properties. The principle of the transition from superhydrophilic to superhydrophobic during heat treatment process was revealed, and how organic adsorption temperature and time affect water contact angle and slide angle was clarified. We found that nano-particles can drastically reduce the solid–liquid fraction of the surface after analysis. The parameters including laser scanning space, organic adsorption time and heat treatment temperature were optimized to realize high-efficient and energy-saving production. Furthermore, superior wetting resistance to various solutions and the self-cleaning property for solid powders were experimentally indicated. Superhydrophobic aluminum surfaces could be efficiently fabricated in several hours without any expensive equipment, complicated process, strict environment and environmentally harmful chemical reagent by the proposed two-step method.
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