Sustainable icephobicity on durable quasi-liquid surface
Sustainable icephobicity on durable quasi-liquid surface
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DOI：
10.1016/j.cej.2021.133475
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发表时间：
2021-11
影响因子：
15.1
通讯作者：
Jyotirmoyee Sarma;Lei Zhang;Zongqi Guo;X. Dai
中科院分区：
文献类型：
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作者：
Jyotirmoyee Sarma;Lei Zhang;Zongqi Guo;X. Dai
全球范围内强烈期望可持续地容易地清除积冰。与能量密集型主动防冰策略相比，依赖于耐用表面涂层的被动防冰策略因其简单性和低成本而备受期待。目前最先进的防冰技术，如液体注入表面，能够显着降低冰的粘附强度。然而，在除冰过程中润滑剂耗尽和涂层损坏的严重耐久性挑战阻碍了它们的实际应用。在这里，我们报告了一个准液体表面，可以显着降低冰的粘附强度，通过降低涂层的剪切模量。由柔性聚合物的高度移动的链提供的准液体润滑将粘性冰/固体界面改变为非粘性冰/准液体界面。此外，每个分子链都化学键合在固体基底上，因此整个表面可以承受长期除冰条件下的磨损。在化学清洗后，准液体涂层上的疏冰性仍然存在，而最先进的液体注入表面由于润滑剂耗尽而失效。此外，我们已经证明，控制的抗冰涂层的剪切模量可以实现小规模和大规模的除冰与准液体的方法。这种具有可持续超低剪切强度的耐用准液体表面显示出减少易结冰地区太阳能电池板，电力线和车辆上积冰的潜力。
Sustainable easy removal of accreted ice has been strongly desired worldwide. Passive anti-icing strategies relying on durable surface coatings are highly desired because of their simplicity and low cost compared to the energy-intensive active strategies. The current state-of-the-art anti-icing technologies, such as liquid-infused surfaces, are able to dramatically reduce ice adhesion strength. Nevertheless, severe durability challenges of lubricant depletion and coating damage during the ice removal process hinder their practical applications. Here, we report a quasi-liquid surface that can significantly reduce the ice adhesion strength by reducing the shear modulus of the coating. The quasi-liquid lubrication provided by the highly mobile chains of the flexible polymer changes the sticky ice/solid interface to a non-sticky ice/quasi-liquid interface. Moreover, each molecule chain is chemically bonded on the solid substrate so the entire surface can withstand abrasion in long-term de-icing conditions. The icephobicity on the quasi-liquid coating persists after chemical rinsing while the state-of-the-art liquid-infused surface fails due to lubricant depletion. In addition, we have demonstrated that controlling the shear modulus of an icephobic coating can achieve both small- and large-scale ice removal with the quasi-liquid approach. Such a durable quasi-liquid surface with sustainable ultralow shear strength shows a potential to reduce ice accretion on solar panels, power lines, and vehicles in ice prone regions.