College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518055, P. R. China.
ACS Appl Mater Interfaces. 2020 Dec 9;12(49):55501-55509. doi: 10.1021/acsami.0c17163. Epub 2020 Nov 20.
Icing of water (moisture) at subzero temperatures with different length scales is harmful to a variety of applications spanning from large-scale aircraft to small camera lens. Existing strategies relying on controlling the surface structure and material are encumbered with shortcomings of short frost delay time, poor durability, and difficulty in large-scale production. Inspired from the mucus secretion of mollusks, we introduce organohydrogel dynamic interfaces that can perform dynamic and reversible exchange of the cryoprotectant and water at the interface, resulting in exceptional antifrosting, antiadhesion, and deicing properties with long-term durability. The replenishable coating shows superlubrication to the surface ice with a sliding angle up to 1.9 ± 0.4 and a frost delay time up to 970 ± 31 min in the presence of water spray (99% relative humidity) at subzero temperatures. The strategy offers a reliable and scalable solution to prevent engineering surfaces, i.e., aircraft, pavement, bridge, and other public facilities, from icing/frosting and ice adhesion, even under extreme cold environments.
在亚低温下，不同长度尺度的水（湿气）结冰对从大型飞机到小型相机镜头的各种应用都有害。现有的依赖于控制表面结构和材料的策略存在着延迟结霜时间短、耐久性差和大规模生产困难等缺点。受软体动物黏液分泌的启发，我们引入了有机水凝胶动态界面，该界面可以在界面处进行动态和可逆的抗冻保护剂和水的交换，从而具有出色的抗霜、抗粘和除冰性能，且具有长期耐久性。这种可补充的涂层在亚低温下（相对湿度为 99%）喷水（水喷雾）时，表现出超滑特性，滑动角高达 1.9±0.4，延迟结霜时间长达 970±31min。该策略为防止工程表面（如飞机、路面、桥梁和其他公共设施）结霜/结冰和冰附着提供了一种可靠且可扩展的解决方案，即使在极端寒冷的环境下也是如此。
