Effect of wettability and surface roughness on ice-adhesion strength of hydrophilic, hydrophobic and superhydrophobic surfaces
Effect of wettability and surface roughness on ice-adhesion strength of hydrophilic, hydrophobic and superhydrophobic surfaces
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DOI：
10.1016/j.apsusc.2014.06.101
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发表时间：
2014-09-30
影响因子：
6.7
通讯作者：
Basu, Bharathibai J.
中科院分区：
文献类型：
--
作者：
Bharathidasan, T.;Kumar, S. Vijay;Basu, Bharathibai J.
采用自制的基于零度锥试验方法的防冰性能评价装置，对亲水、疏水和超疏水表面/涂层的防冰性能进行了评价。这些涂层的冰粘附减少因子（ARF）已被评估使用裸铝合金作为参考。通过测量水接触角（WCA）和滑动角来评价表面的润湿性。据发现，与裸抛光铝合金相比，基于硅酮的疏水性表面上的冰粘附强度（tau）大约低43倍，表明这些涂层的优异防冰性能。超疏水涂层拒水率高，但防冰性能差。场发射扫描电子显微镜显示，有机硅基疏水涂层表现出光滑的表面，而超疏水涂层具有由纳米球叠加的微米级凸起和突起组成的粗糙表面。表面粗糙度和表面能对涂层的冰粘附强度起主要作用。涂层的3D表面粗糙度轮廓也表明了相同的粗糙度趋势。试图将不同表面的冰粘附强度与其润湿性和表面粗糙度相关联。(C)2014爱思唯尔有限公司版权所有。
The anti-icing properties of hydrophilic, hydrophobic and superhydrophobic surfaces/coatings were evaluated using a custom-built apparatus based on zero-degree cone test method. The ice-adhesion reduction factor (ARF) of these coatings has been evaluated using bare aluminium alloy as a reference. The wettability of the surfaces was evaluated by measuring water contact angle (WCA) and sliding angle. It was found that the ice-adhesion strength (tau) on silicone based hydrophobic surfaces was similar to 43 times lower than compared to bare polished aluminium alloy indicating excellent anti-icing property of these coatings. Superhydrophobic coatings displayed poor anti-icing property in spite of their high water repellence. Field Emission Scanning Electron Microscope reveal that Silicone based hydrophobic coatings exhibited smooth surface whereas the superhydrophobic coatings had a rough surface consisting of microscale bumps and protrusions superimposed with nanospheres. Both surface roughness and surface energy play a major role on the ice-adhesion strength of the coatings. The 3D surface roughness profiles of the coatings also indicated the same trend of roughness. An attempt is made to correlate the observed ice-adhesion strength of different surfaces with their wettability and surface roughness. (C) 2014 Elsevier B.V. All rights reserved.