Affiliation of Author(s):材料科学与技术学院
Journal:ACS APPLIED MATERIALS & INTERFACES
Key Words:coatings spraying water repellency icephobicity durability
Abstract:Anti-icing/icephobic coatings, typically applied in the form of surface functional materials, are considered to be an ideal selection to solve the icing issues faced by daily life and industrial production. However, the applications of anti-icing coatings are greatly limited by the two main challenges: bonding strength with substrates and stability of the high anti-icing performance. Here, we designed and fabricated a kind of high-performance superhydrophobic fluorinated silica (F-SiO2)@polydimethylsiloxane coatings and further emphasized the improvement of the bonding strength with substrates and the maintenance of high anti icing performance. The resultant coatings exhibited excellent water repellency with a contact angle up to 155.3 degrees and a very short contact time (similar to 10.2 ms) of impact droplets. At low temperatures, the coming droplets still rapidly rebounded off the coating surface, and the superhydrophobic coatings displayed a more than 50-fold increase of freezing time comparing with bare aluminum. The ice adhesion strength on the coatings was only 26.3 kPa, which was far less than that (821.9 kPa) of bare aluminum. Furthermore, the nanoporous structures constructed by anodic oxidation could tremendously enhance the bonding strength of the coatings with the substrate, which was evaluated through a standard method (ASTM D3359). The anti-icing properties still retained high stability under the conditions of 30 icing/deicing cycles, soaking, and scouring of acid solution (pH = 5.6). This work can effectively push the anti-icing coatings toward a real-world application.
ISSN No.:1944-8244
Translation or Not:no
Date of Publication:2019-01-23
Co-author:Wu, Yu,wyh,Jie Tao,Zhu, Chunling,Zhu Chunling,Chen, Haifeng,Wu, Zhengwei,Xie, Yuehan
Correspondence Author:沈一洲,陶杰,沈一洲
Date of Publication:2019-01-23