Journal of Bionic Engineering ›› 2021, Vol. 18 ›› Issue (1): 55-64.doi: 10.1007/s42235-021-0012-4
A Passive Anti-icing Strategy Based on a Superhydrophobic Mesh with Extremely Low Ice Adhesion Strength
Peng Wang1,2*, Ziqiang Li1,2, Qing Xie3, Wei Duan1,2, Xinchun Zhang1,2, Huilong Han1,2
- 1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071000, China
2. Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, North China Electric Power University, Baoding 071003, China
3. School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China
A Passive Anti-icing Strategy Based on a Superhydrophobic Mesh with Extremely Low Ice Adhesion Strength
Peng Wang1,2*, Ziqiang Li1,2, Qing Xie3, Wei Duan1,2, Xinchun Zhang1,2, Huilong Han1,2
- 1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071000, China
2. Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, North China Electric Power University, Baoding 071003, China
3. School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China
摘要： Although superhydrophobic materials have attracted much research interest in anti-icing, some controversy still exists. In this research, we report a cost-effective method used to verify the contribution of area fraction to ice adhesion strength. We tried to partially-embed silica nanoparticles into microscale fabrics of a commercial polyamide mesh. Then, the area fraction could be determined by altering the mesh size. Generally, the ice adhesion strength decreases as the area fraction decreases. An ice adhesion strength of ~1.9 kPa and a delayed freezing time of ~1048 s can be obtained. We attribute the low ice adhesion strength to the combination of superhydrophobicity and stress concentration. The superhydrophobicity prohibits the water from penetrating into the voids of the meshes, and the small actual contact area leads to stress concentration which promotes interfacial crack propagation. Moreover, our superhydrophobic mesh simultaneously exhibits a micro-nano hierarchical structure and a partially-embedded structure. Therefore, the as-prepared superhydrophobic mesh retained the icephobicity after 20 icing/deicing cycles, and maintained its superhydrophobicity even after 60 sandpaper-abrasion cycles and a 220 ?C thermal treatment.