Abstract Ice accretion is detrimental for the safety of transmission lines, aircraft, and buildings, which may also result in economic loss. In this study, a thin polytetrafluoroethylene (PTFE) coating on the aluminum substrate was fabricated by electrostatic attraction self-assembly technique and proposed for large-scale deicing application. The shear-force F i c e analysis on deicing and related ice adhesion is conducted while interfacial toughness between solid-ice interfaces was also measured. Moreover, the surface morphology, wettability of the PTFE coated aluminum plate was also characterized. It was observed that the critical bonded length L c between ice and PTFE coated surface is about 2.85 cm. When the bonded length L was higher than this value, the shear-force of dislodging ice could stay constant at about 50 N for the first deicing cycle. From the second deicing cycle, the constant shear-force is increased to 70 N and kept constant for at least ten cycles. Meanwhile, the surface roughness and water contact angle kept on increasing along with the loss of PTFE nanoparticles during icing-deicing cycles. Ultimately, An ice layer with the size of 98 cm × 96 cm×1 cm (L × w×h) was developed on the surface of PTFE coated aluminum substrate for the demonstration of its fracture and falling off under ice’s weight.

中文翻译：

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一种用于有效大规模除冰的有前途的自组装 PTFE 涂层

摘要 积冰不利于输电线路、飞机和建筑物的安全，也可能造成经济损失。在这项研究中，通过静电吸引自组装技术在铝基板上制造了一层薄的聚四氟乙烯 (PTFE) 涂层，并建议用于大规模除冰应用。对除冰和相关冰粘附进行剪切力 F 冰分析，同时还测量了固体-冰界面之间的界面韧性。此外，还表征了PTFE涂层铝板的表面形态、润湿性。据观察，冰和 PTFE 涂层表面之间的临界结合长度 L c 约为 2.85 厘米。当粘合长度 L 高于该值时，在第一个除冰循环中，除冰的剪切力可以保持恒定在 50 N 左右。从第二个除冰周期开始，恒定剪切力增加到 70 N，并在至少 10 个周期内保持恒定。同时，表面粗糙度和水接触角随着 PTFE 纳米颗粒在结冰-除冰循环过程中的损失而不断增加。最后，在 PTFE 涂层铝基板的表面形成 98 cm × 96 cm × 1 cm (L × w × h) 大小的冰层，以证明其在冰的重量下断裂和脱落。