Anti‐Icing Performance of Superhydrophobic Surface with Square‐Ring Structure Prepared by Nanosecond Laser
Yanling Wan, Candong Yan, Huadong Yu, Bo Wang
Abstract
Herein, a square‐ring structure array is constructed on an aluminum alloy surface using a nanosecond laser‐processing method. A durable and anti‐icing superhydrophobic surface is obtained after heating treatment. The surface properties of the square‐ring structure and the icing behavior of the surface are investigated. Results show that the surfaces of the square‐ring structure fabricated in two different sizes display a high contact angle of 152.3° and 154.3° and a low sliding angle of 3.3° and 2.1° at a temperature of 15 °C, and even at −15 °C the surface still displays low adhesion, with a sliding angle lower than 6.3°, which could effectively make the water droplet slide away from the surface before freezing. The anti‐icing performance experiment shows that the surface with the square‐ring structure has good anti‐icing performance, with the icing delay time greater than 700 s, and the icing quantity is greatly reduced at the temperature of −15 °C. Finally, the durability experiment shows that both the wettability and the icing delay time performance of the superhydrophobic surface with the newly fabricated square‐ring structure display good stability.