Zheng Minchao, Zhou Cheng, Liu Qinpei, Li Xia, Yang Yuxin, Sun Yan, Zhu Zhenyu, Huang Yanyan, Zhou Qinghua
School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China.
School of Aeronautics and Astronautics, Sichuan University, Chengdu, 610065, China.
Soft Matter. 2023 Nov 29;19(46):9036-9049. doi: 10.1039/d3sm00945a.
Insulator string icing can cause flashovers or even blackouts in transmission systems and the existing mature deicing methods are usually costly or time consuming. So, in this research PF-POS@SiO/CB superhydrophobic coatings (SiO/CB-0, SiO/CB-10, SiO/CB-20, SiO/CB-30, SiO/CB-40 and SiO/CB-50) with photothermal deicing and passive anti-icing properties were designed and prepared on the surface of two types of insulator materials (glass and ceramic) by using a simple spraying method. Then, the wettability properties, photothermal properties, and anti-icing/deicing properties of the coatings with the addition of different amounts of SiO/CB were evaluated. PF-POS@SiO/CB coatings with no less than 30 wt% of CB (carbon black) content simultaneously exhibit excellent passive anti-icing and deicing performance. For SiO/CB-30, the water contact angle is as high as 164.9° and the rolling angle is as low as 3° because the combination of silica and carbon black nanoparticles gives the coating a micro/nanostructure and the low surface energy of 1,1,2,2-perfluorodecyltriethoxysilane leads to superhydrophobic properties, and the equilibrium temperature of the coating is up to 71.1 °C at 1 solar irradiation because of the photothermal effect of carbon black. The results of the analysis of anti-icing/deicing properties of the coatings to evaluate their potential for engineering applications demonstrate that it takes longer time for ice to form on the coated surface than on a substrate without coating, and the ice completely melts under sunlight after 10 min and falls off automatically by its weight for the addition of 30 wt% carbon black and above, showing excellent deicing performance. Both types of substrates show excellent adhesion with the superhydrophobic coating, which can be classified as class 1 based on the paint and varnish-cross-section test method, and the ceramic material exhibits better adhesion than the glass.
绝缘子串覆冰会导致输电系统发生闪络甚至停电，而现有的成熟除冰方法通常成本高昂或耗时较长。因此，在本研究中，通过简单的喷涂方法在两种绝缘子材料（玻璃和陶瓷）表面设计并制备了具有光热除冰和被动防冰性能的PF-POS@SiO/CB超疏水涂层（SiO/CB-0、SiO/CB-10、SiO/CB-20、SiO/CB-30、SiO/CB-40和SiO/CB-50）。然后，评估了添加不同量SiO/CB的涂层的润湿性、光热性能以及防冰/除冰性能。炭黑（CB）含量不少于30 wt%的PF-POS@SiO/CB涂层同时表现出优异的被动防冰和除冰性能。对于SiO/CB-30，水接触角高达164.9°，滚动角低至3°，这是因为二氧化硅和炭黑纳米颗粒的组合赋予涂层微/纳米结构，而1,1,2,2-全氟癸基三乙氧基硅烷的低表面能导致超疏水性能，并且由于炭黑的光热效应，涂层在1个太阳辐射下的平衡温度高达71.1°C。对涂层的防冰/除冰性能进行分析以评估其工程应用潜力的结果表明，与未涂覆的基材相比，涂覆表面上结冰所需的时间更长，对于添加30 wt%及以上炭黑的情况，冰在阳光下10分钟后完全融化并因其自身重量自动脱落，显示出优异的除冰性能。两种基材与超疏水涂层均表现出优异的附着力，根据油漆和清漆-横截面试验方法可将其归类为1级，并且陶瓷材料的附着力比玻璃更好。
