Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA.
Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA.
Science. 2019 Apr 26;364(6438):371-375. doi: 10.1126/science.aav1266.
Ice accretion has adverse effects on a range of commercial and residential activities. The force required to remove ice from a surface is typically considered to scale with the iced area. This imparts a scalability limit to the use of icephobic coatings for structures with large surface areas, such as power lines or ship hulls. We describe a class of materials that exhibit a low interfacial toughness with ice, resulting in systems for which the forces required to remove large areas of ice (a few square centimeters or greater) are both low and independent of the iced area. We further demonstrate that coatings made of such materials allow ice to be shed readily from large areas (~1 square meter) merely by self-weight.
积冰对一系列商业和住宅活动都有不利影响。从表面去除冰所需的力通常被认为与结冰面积成比例。这就给具有大面积表面的结构（如输电线或船体）使用疏冰涂层带来了可扩展性限制。我们描述了一类材料，它们与冰的界面韧性低，导致去除大面积冰（几平方厘米或更大）所需的力既低又与结冰面积无关的系统。我们进一步证明，由这种材料制成的涂层仅通过自重就能使大面积（约 1 平方米）的冰很容易脱落。
