Investigation on the differences of surface cleaning properties of series of superhydrophobic aluminum alloys
Investigation on the differences of surface cleaning properties of series of superhydrophobic aluminum alloys
复制标题
系列超疏水铝合金表面清洁性能差异的研究
DOI：
10.1016/j.colsurfa.2022.129614
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发表时间：
2022-07-13
影响因子：
5.2
通讯作者：
Zhou, Chao
中科院分区：
文献类型：
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作者：
Liu, Wenlong;Wang, Shouren;Zhou, Chao
由于铝的金属活性，通常采用化学腐蚀的方法在铝基体上制备超疏水表面。然而，不同系列的铝合金所制备的超疏水表面的性质存在差异。本文以工业上常用的1060、2024、5052、6061和7075等牌号的铝合金为研究对象，采用相同的化学刻蚀方法制备了不同的超疏水或疏水铝表面（SH-HAS）。研究了不同微纳结构对表面润湿性、机械耐久性、防冰性和自清洁性的影响。结果表明，不同铝合金经腐蚀后的表面微观形貌差异显著。不同的微纳结构决定了SH-HAS的表面粗糙度和实际的液固接触面积，从而导致不同的接触角（CA）和滑动角（SA）。进一步的试验表明，CA越大、SA越小的SH-HAS具有越上级的防冰性能，而硬度和表面粗糙度越大的SH-HAS具有越好的机械耐久性。此外，所有五种SH-HAS都具有优异的自清洁性能，这将对铝制品和设备的防污和除垢产生积极影响。
Due to the metallic activity of aluminum, superhydrophobic surfaces are often prepared on aluminum substrates by chemical etching method. However, there are differences in the properties of superhydrophobic surfaces prepared from different series of aluminum alloys. Here, aluminum alloys of the brands 1060, 2024, 5052, 6061 and 7075, which are commonly used in industry, were chosen as experimental subjects and fabricated into different superhydrophobic or hydrophobic aluminum surfaces (SH-HAS) by the same chemical etching method. The effects of different micro-nano structures on surface wettability, mechanical durability, anti-icing and self-cleaning properties were investigated. The results showed that the surface microscopic morphology of different aluminum alloys after etching differed significantly. Different micro-nano structures would determine the surface roughness and the actual liquid-solid contact area of SH-HASs, resulting in different contact angles (CA) and sliding angles (SA). Further experiments demonstrated that SH-HASs with larger CA and smaller SA exhibited more superior anti-icing properties, while those with larger hardness and surface roughness had greater me-chanical durability. In addition, all five SH-HASs had excellent self-cleaning properties that would positively impact the anti-fouling and de-fouling of aluminum products and equipment.