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Different Approaches to Low-Wettable Materials for Freezing Environments: Design, Performance and Durability

机译：用于冻结环境的低可润湿材料的不同方法：设计，性能和耐用性

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摘要

Ice nucleation and accretion leads to multiple problems such as freezing of the streets which can cause traffic collisions or people injuries, and collapse of high voltage power lines leading to black-out and icing of aircraft components, causing major aeronautic accidents. The most widespread strategies for the removal of accumulated ice layers result in most cases being expensive, time-consuming and hazardous for the environment. In this work we present the design of hydrophobic hybrid inorganic-organic coatings via Lotus leaf-like and slippery liquid infused porous surfaces (SLIPS) approaches with reduced, lasting wetting performance in cold environments. Static and dynamic wetting behavior was evaluated at room and sub-zero temperatures. The main target was the selection of the most suitable design approaches and formulations of coatings to be applied on metals or alloys when the contact time between the droplet and the material surface has to be minimized. In the temperature range from ?10 to 0 °C, we report evidence of a stable hydrophobicity and a low water contact angle hysteresis (below 15°) of all the SLIPS developed. The surfaces’ ability to keep their wetting performance unchanged during the freeze/and frost/thaw durability cycles stood out as a key issue for further development at larger scale.
机译：冰成核和增生导致多个问题，例如街道的冻结，这可能导致交通碰撞或人员伤害，以及导致飞机组件的黑色和结冰的高压电力线崩溃，导致主要的航空事故。在大多数情况下，最普遍的去除积累的覆盖物的策略昂贵，耗时和对环境危险。在这项工作中，我们介绍了通过莲花状和滑湿液体注入多孔表面（Slips）的疏水混合无机 - 有机涂层的设计，减少，持续润湿性能在冷环境中。在房间和次零温度下评估静态和动态润湿行为。主要目标是选择当必须最小化的液滴和材料表面之间的接触时间时，选择最合适的设计方法和涂层的配方。在Δ10至0℃的温度范围内，我们报告了所有开发的所有滑块的稳定疏水性和低水接触角滞后（低于15°）的证据。在冻结/和霜/解冻持续性期间保持润湿性能不变的表面能够作为进一步发展的较大尺度的关键问题。

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