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.

中文翻译：

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冷冻环境中低润湿性材料的不同方法：设计，性能和耐久性

冰的成核和积聚导致多种问题，例如街道结冰，这可能会导致交通事故或人员受伤，高压电线的坍塌会导致飞机部件停电和结冰，从而导致重大航空事故。在大多数情况下，去除积聚的冰层的最普遍策略是昂贵，费时且对环境有害。在这项工作中，我们介绍了通过荷叶状和光滑的液体注入多孔表面（SLIPS）方法设计的疏水混合无机-有机涂料，该方法在寒冷环境中具有降低的持久润湿性能。在室温和零下温度下评估静态和动态润湿行为。主要目标是当液滴和材料表面之间的接触时间必须最小化时，选择最合适的设计方法和涂料配方，以应用于金属或合金。在-10至0°C的温度范围内，我们报告了所有开发的SLIPS具有稳定的疏水性和低水接触角滞后（低于15°）的证据。表面在冷冻/霜冻/融化耐久性循环中保持其润湿性能不变的能力已成为进一步大规模开发的关键问题。我们报告了所有开发的SLIPS均具有稳定的疏水性和低水接触角滞后（低于15°）的证据。表面在冷冻/霜冻/融化耐久性循环中保持其润湿性能不变的能力已成为进一步大规模开发的关键问题。我们报告了所有开发的SLIPS均具有稳定的疏水性和低水接触角滞后（低于15°）的证据。表面在冷冻/霜冻/融化耐久性循环中保持其润湿性能不变的能力已成为进一步大规模开发的关键问题。