Mechanically robust superhydrophobic and superoleophobic coatings derived by sol-gel method
Mechanically robust superhydrophobic and superoleophobic coatings derived by sol-gel method
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DOI：
10.1016/j.matdes.2015.10.053
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发表时间：
2016-01-05
影响因子：
8.4
通讯作者：
Chen, Zhong
中科院分区：
文献类型：
--
作者：
Wu, Xinghua;Fu, Qitao;Chen, Zhong
显示出超疏水和超疏油行为的机械坚固涂层对于包括运动设施、汽车和飞行器、太阳能电池板和风力涡轮机叶片的广泛应用具有极大的兴趣。本研究采用溶胶-凝胶法，将低表面能和高表面能的SiO2纳米粒子相结合，制备了超疏水和超疏油涂层。用表面能为72.4 ~ 29.5mJ/m（2）的各种液滴分析了涂层的疏水性和疏油性。对涂层的机械性能进行了划痕试验、横切胶带附着力试验、纳米压痕试验和PosiTest Pull-Off附着力试验。通过控制低表面能和高表面能SiO2纳米颗粒的摩尔比来调节表面拓扑结构。结果表明，当低表面能SiO2纳米粒子与高表面能SiO2纳米粒子的摩尔比为2：4时，涂层具有最佳的超疏油性和力学性能。这种涂层在机械腐蚀/磨损环境下具有良好的自清洁和防冰应用前景。(C)2015爱思唯尔有限公司版权所有。
Mechanically robust coatings that display both superhydrophobic and superoleophobic behavior are of great interest for a wide range of applications including sports facilities, automobile and aircraft, solar panels, and wind turbine blades. In this study, a novel method of, combining both low and high surface energy SiO2 nanoparticles was employed to prepare superhydrophobic and superoleophobic coating by sal-gel method. The hydrophobicity and oleophobicity of the coatings were analyzed by various liquid droplets with surface energy ranging from 72.4 to 29.5 mJ/m(2). Pencil scratch test cross-cut tape adhesion test, nano-indentation, and PosiTest Pull-Off adhesion test were carried out for the coating mechanical properties. Tuning of surface topology was carried out by controlling molar ratio of low and high surface energy SiO2 nanoparticles. It is observed that with the molar ratio at 2:4 between the low and high surface energy SiO2 nanoparticles, the coating gives rise to the best superoleophobicity and mechanical properties. Such coatings hold good promise for self-cleaning and anti-icing applications under mechanically erosive/abrasive environment. (C) 2015 Elsevier Ltd. All rights reserved.