Facile one-step fabrication of super-repellent nanoporous anodic alumina using a non-fluorinated approach
Facile one-step fabrication of super-repellent nanoporous anodic alumina using a non-fluorinated approach
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DOI：
10.1007/s12034-020-02129-z
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发表时间：
2020-08-09
影响因子：
1.8
通讯作者：
George, S. D.
中科院分区：
文献类型：
--
作者：
Choudhari, K. S.;Kulkarni, S. D.;George, S. D.
受莲花效应的启发，超疏水性在自清洁、防污和液体输送等领域引起了人们的广泛关注。超疏水表面主要可以通过创建微米/纳米级结构或通过低表面能材料进行化学改性来改变表面来制备。在这项研究中，电化学制造的纳米多孔氧化铝通过一步热处理与聚（二甲基硅氧烷）沉积，以获得超防水或超疏水表面。具有不同孔径的纳米多孔阳极氧化铝基材用于聚（二甲基硅氧烷）沉积，并使用场发射扫描电子显微镜对其形态进行表征。能量色散 X 射线光谱、傅里叶变换红外光谱推断了化学成分，同时利用商用接触角测量系统进行接触角测量来探测水在制造的基材上的铺展行为。该基材还表现出对乙二醇的高排斥行为。当将基板浸入癸烷、己烷和甲苯等有机溶剂中时，研究了所制造的基板的超疏水行为。此外，研究了基材对王水和饱和氢氧化钠等腐蚀性化学品的超排斥行为，发现基材保留了对腐蚀性溶液的超排斥行为。此外，还证明了所制造的基板的自洁性能和防污性能。
Inspired by lotus-effect, superhydrophobicity has attracted considerable interest in various areas such as self-cleaning, antifouling and liquid transportation, and so on. Superhydrophobic surfaces can be prepared mostly by altering the surface with creating micro/nanoscale structures or with chemically modifying by materials of low surface energy. In this study, the electrochemically fabricated nanoporous alumina is deposited with poly(dimethylsiloxane) via a one-step thermal treatment to achieve ultra-water repellent or superhydrophobic surfaces. Nanoporous anodic alumina substrates with varying pore diameters were used for the poly(dimethylsiloxane) deposition, and their morphological characterization is carried out using the field emission scanning electron microscope. Energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy inferred the chemical composition, while contact angle measurements using a commercial contact angle measurement system is exploited to probe the water spreading behaviour on the fabricated substrates. The substrates also exhibit high repellence behaviour towards ethylene glycol. The superhydrophobic behaviour of the fabricated substrates is investigated while the substrate is immersed in organic solvents like decane, hexane and toluene. In addition, the super repellence behaviour of the substrates against the corrosive chemicals such as aqua regia and saturated sodium hydroxide is investigated and the substrate was found to retain its super repellence behaviour against corrosive solutions. Further, the self-cleaning properties and antifouling behaviour of the fabricated substrates were also demonstrated.