Study on dynamics and freezing behaviors of water droplet on superhydrophobic aluminum surface
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Study on dynamics and freezing behaviors of water droplet on superhydrophobic aluminum surface Huaqiao Peng1 · Qiang Wang1 · Tianming Wang1 · Lin Li1 · Zuxi Xia1 · Juan Du2 · Baozhan Zheng2 · Hong Zhou1 · Liwei Ye1 Received: 9 February 2020 / Accepted: 16 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this work, a kind of superhydrophobic aluminum surface (treated-Al-SA) is fabricated by chemical etching using hydrochloric acid and hydrogen peroxide, and then treated by stearic acid. The surface of treated-Al-SA has typical hierarchical structure, which hold its durable superhydrophobicity under water droplet impact test, bending test, temperature test, humidity test and corrosive liquids test. Moreover, treated-Al-SA show excellent self-cleaning property at the different tilt angle under room temperature. Results on the dynamic behavior of water droplet is indicated the good anti-adhesion and superhydrophobicity of the treated-Al-SA. The whole freezing process of the water droplets on the surface of untreated-Al and treated-AlSA is observed. The freezing time of treated-Al-SA is 59 s, which is longer than that of untreated-Al. It is estimated that the different anti-freezing behavior is caused by the thermal conductivity between the water droplet and plate, which is provided an insight into freezing characteristics of water droplet. This study is offered the novel opinion of the superhydrophobic aluminum surface produced by chemical etching, which may help the application of structured aluminum surface. Keywords Superhydrophobicity · Stability · Dynamic behavior · Freezing behavior · Aluminum alloy
1 Introduction Superhydrophobic surfaces with water contact angles (CA) higher than 150° and sliding angle (SA) lower than 10° [1] have received lots of interests in both academic research and industrial application due to their excellent properties including anti-icing [2–4], self-cleaning [5, 6], corrosion resistance [7–9], antibacterial [10] and so on. Because of lower price, highly conductivity, adequate mechanical strength and low density, aluminum alloy is one of the most significant materials for human lives, which is Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00339-020-04003-5) contains supplementary material, which is available to authorized users. * Huaqiao Peng [email protected] * Hong Zhou [email protected] 1
The Second Research Institute of Civil Aviation Administration of China, Chengdu 610041, China
Sichuan University, Chengdu 610041, China
2
currently used in many fields, such as automotive, building, aircraft and aerospace, etc. [11]. However, ice accumulation on aluminum alloy limits its applications [12, 13]. As a result, superhydrophobic surface could improve anti-freezing performances of aluminum by avoiding water droplet, which will further widen its potential applications significantly. To date, many methods have been reported and developed for achieving superhydrophobicity, suc
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