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Anti-icing Ionogel Surfaces: Inhibiting Ice Nucleation, Growth, and Adhesion
ACS Materials Letters ( IF 9.6 ) Pub Date : 2020-04-30 , DOI: 10.1021/acsmaterialslett.0c00094
Yizhi Zhuo 1 , Senbo Xiao 1 , Verner Håkonsen 1 , Jianying He 1 , Zhiliang Zhang 1
Affiliation  

Delaying ice and frost formation is one of the key strategies to mitigate the hazards induced by ice accretion. The current surfaces for delaying ice formation rely on restricting heterogeneous ice nucleation, which fails in practical application because dust and impurities from the environment can serve as undesired nucleation sites and, thus, promote ice nucleation. Herein, ionogel surfaces are prepared to not only inhibit ice nucleation but also control ice growth. At −20 °C, the prepared surface enables an unconventional inward ice growth from the water droplet–air interface, resulting in a spherical cap ice rather than a normal pointy cap ice. Both experiments and molecular simulations confirm that the prepared ionogel surface can efficiently generate an interfacial liquid layer thanks to the inward ice growth and the presence of ionic liquid. Such non-frozen interfacial liquid layer is desired for lowering ice adhesion and preventing frost formation. Consequently, the ionogel surface exhibits exceptional anti-frost abilities under cold humid environment (−20 °C, importing gas 60% RH at 20 °C).

中文翻译:

防冰离子凝胶表面:抑制冰成核,生长和粘附

延缓冰和霜的形成是减轻因积冰引起的危害的关键策略之一。当前用于延迟冰形成的表面依赖于限制非均质的冰核化,这在实际应用中是失败的,因为来自环境的灰尘和杂质可以用作不希望的核化位点,从而促进了冰核化。在此,准备离子凝胶表面以不仅抑制冰成核,而且控制冰的生长。在-20°C时,准备好的表面能够使水滴与空气的界面形成非常规的向内冰,从而形成球形的盖冰,而不是普通的尖形盖冰。实验和分子模拟均证实,由于向内的冰生长和离子液体的存在,所制备的离子凝胶表面可以有效地产生界面液层。需要这种非冷冻的界面液体层以降低冰的附着并防止霜的形成。因此,离子凝胶表面在寒冷潮湿的环境(-20°C,在20°C时输入60%RH的气体)下表现出出色的抗冻能力。
更新日期:2020-04-30
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