Zhang Fei, Yan Hongjie, Chen Meijie
School of Energy Science and Engineering, Central South University, Changsha, 430001, China.
Small. 2024 Aug;20(32):e2312226. doi: 10.1002/smll.202312226. Epub 2024 Mar 21.
Ice accretion can significantly impact the efficiency and safety of outdoor equipment. Solar-thermal superhydrophobic surface is an effective strategy for anti-icing and deicing. However, droplets easily turn to the Wenzel state during the icing and melting cycle processes, significantly increasing the adhesion and making the droplets difficult to remove from the surface. In this work, a triple-scale solar-thermal superhydrophobic surface is prepared on stainless steel 304 by etching, in situ oxidation, and spin-coating TiN nanoparticles for highly efficient deicing and anti-icing. The multi-scale structure enabled the droplets to recover the Cassie state completely after melting. The contact angle decreased from 162.5° to 136.7° during the icing process and gradually increased to 162.1° during the melting process. In addition, metal oxides and TiN nanoparticles enabled the superhydrophobic surface to exhibit a high solar absorptivity ( = 0.925). The synergistic effect of the superhydrophobicity and the solar-thermal performance endowed the designed multi-scale surface with excellent anti-icing and deicing performance. This work contributed to the practical development of anti-icing and deicing applications based on solar-thermal superhydrophobic surfaces.
结冰会显著影响户外设备的效率和安全性。太阳能-热超疏水表面是一种有效的防冰和除冰策略。然而，在结冰和融化循环过程中，液滴很容易转变为Wenzel状态，显著增加附着力，使液滴难以从表面去除。在这项工作中，通过蚀刻、原位氧化和旋涂TiN纳米颗粒，在304不锈钢上制备了一种三尺度太阳能-热超疏水表面，用于高效除冰和防冰。这种多尺度结构使液滴在融化后能完全恢复到Cassie状态。在结冰过程中，接触角从162.5°降至136.7°，在融化过程中逐渐增至162.1°。此外，金属氧化物和TiN纳米颗粒使超疏水表面具有高太阳能吸收率（α = 0.925）。超疏水性和太阳能-热性能的协同作用赋予了所设计的多尺度表面优异的防冰和除冰性能。这项工作有助于基于太阳能-热超疏水表面的防冰和除冰应用的实际开发。
