Quantification of superhydrophobic functionalization for laser textured metal surfaces
Quantification of superhydrophobic functionalization for laser textured metal surfaces
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DOI：
10.1016/j.colsurfa.2021.128126
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
Wuji Huang;R. Ordikhani-Seyedlar;A. Samanta;S. Shaw;Hongtao Ding
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作者：
Wuji Huang;R. Ordikhani-Seyedlar;A. Samanta;S. Shaw;Hongtao Ding
激光毛化是一种简单的提高表面润湿性的方法。虽然大多数激光毛化金属表面具有天然的超亲水性，但我们在此建立了毛化后化学修饰与水接触角之间的定量关系，范围约为80°θw<；采用基于纳秒激光的高通量表面纳米结构(NHSN)方法对铝合金表面进行毛化处理。将织构表面浸泡在不同浓度和不同时间的氯硅烷试剂[CF3(CF2)5(CH2)2SiCl3](Fots)的乙醇溶液中，以实现超疏水。考察并量化了浓度和处理时间两个化学处理参数对处理效果的影响。采用水接触角、基于反射的红外光谱和能量色散X射线光谱对功能化表面进行了表征。这项研究的目的是利用表面敏感光谱技术来量化表面化学修饰对所产生的材料功能的影响。结果表明，溶液浓度和浸泡时间对表面官能团(-CF2-、-CF3)的附着有显著影响。此外，低至0.1%的Fots浓度与6小时的化学浸泡处理，或短至3小时的处理时间与0.5%的Fots溶液足以实现超疏水。
Laser texturing is a facile method to promote modified surface wetting properties. While most laser textured metal surfaces are natively superhydrophilic, here we establish a quantitative relationship between post-texturing chemical modification and water contact angles from ca. 80° <θw< 180°. A nanosecond laser-based high-throughput surface nanostructuring (nHSN) method is used to texture aluminum alloy surfaces. The textured surfaces are immersed in ethanol solutions of chlorosilane reagent [CF3(CF2)5(CH2)2SiCl3] (FOTS) at different concentrations and different times to achieve superhydrophobicity. The role played by the two chemical treatment parameters, concentration and treatment time, is investigated and quantified. Water contact angle, reflection-based infrared spectroscopy and energy-dispersive X-ray spectroscopy are used to characterize the functionalized surface. The goal of this research is to quantify the effects of surface chemical modification on the resulting material functionality using surface sensitive spectroscopic techniques. Our results show that both the solution concentration and the immersion treatment time play significant roles in the attachment of functional groups (-CF2-, -CF3) on surface. Further, concentrations of FOTS as low as 0.1% with six hours of chemical immersion treatment, or short treatment times as low as three hours with 0.5% FOTS solution are adequate to achieve superhydrophobicity.