On ice-releasing properties of rough hydrophobic coatings
On ice-releasing properties of rough hydrophobic coatings
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DOI：
10.1016/j.coldregions.2010.01.001
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发表时间：
2011-01-01
影响因子：
4.1
通讯作者：
Farzaneh, M.
中科院分区：
文献类型：
--
作者：
Kulinich, S. A.;Farzaneh, M.
在这项工作中，基于不同的材料和不同的表面形貌粗糙的疏水涂层的拒冰性进行了评估。涂层的制备从含氟聚合物与纳米粒子或通过蚀刻铝合金基板，然后通过从溶液中吸附的有机硅烷单层的粗糙表面的进一步疏水化。这使得可以比较具有高水接触角（类似于150-153度）和不同动态疏水性和机械性能的粗糙表面的释冰性能。在风洞中，在零度以下的温度下，通过喷射过冷水微滴，在表面上堆积类似于自然形成的釉冰。通过在离心机中以不断增加的速度旋转样品直到发生冰脱离来评价冰粘附强度。结果表明，经过几次冰-除冰循环后。与基于掺入纳米颗粒的含氟聚合物的对应物相比，通过蚀刻铝基材制备的更坚固的表面更好地保持了其冰释放性能。还检查了涂层的动态疏水性的效果，清楚地表明，具有低动态疏水性的表面是不防冰的，尽管它表现出大的水接触角值。皇冠版权所有（C）2010由爱思唯尔B. V.出版保留所有权利。
In this work, ice repellency of rough hydrophobic coatings based on different materials and with different surface topographies is evaluated. The coatings were prepared either from a fluoropolymer incorporated with nanoparticles or by etching aluminum alloy substrate followed by further hydrophobization of the rough surface via an organosilane monolayer adsorbed from solution. This allowed comparing the ice-releasing performance of rough surfaces with high water contact angles (similar to 150-153 degrees) and different dynamic hydrophobicities and mechanical properties. Artificially created glaze ice, similar to naturally occurring glaze, was accreted on the surfaces by spraying supercooled water microdroplets in a wind tunnel at subzero temperature. The ice adhesion strength was evaluated by spinning the samples in a centrifuge at constantly increasing speeds until ice detachment occurred. The results showed that, after several icing-deicing cycles. the more robust surfaces prepared by etching the aluminum substrate maintained their ice-releasing properties better, compared to their counterparts based on nanoparticle-incorporated fluoropolymer. The effect of the dynamic hydrophobicity of the coatings was also examined, clearly demonstrating that the surface with low dynamic hydrophobicity is not ice-repellent, although it demonstrates large values of water contact angle. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.