Cai Yuxuan, Coyle Thomas W, Azimi Gisele, Mostaghimi Javad
Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada.
Department of Materials Science and Engineering, University of Toronto, 184 College Road, Toronto, ON, M5S 3E4, Canada.
Sci Rep. 2016 Apr 19;6:24670. doi: 10.1038/srep24670.
This work presents a novel coating technique to manufacture ceramic superhydrophobic coatings rapidly and economically. A rare earth oxide (REO) was selected as the coating material due to its hydrophobic nature, chemical inertness, high temperature stability, and good mechanical properties, and deposited on stainless steel substrates by solution precursor plasma spray (SPPS). The effects of various spraying conditions including standoff distance, torch power, number of torch passes, types of solvent and plasma velocity were investigated. The as-sprayed coating demonstrated a hierarchically structured surface topography, which closely resembles superhydrophobic surfaces found in nature. The water contact angle on the SPPS superhydrophobic coating was up to 65% higher than on smooth REO surfaces.
这项工作提出了一种新颖的涂层技术，能够快速且经济地制造陶瓷超疏水涂层。由于稀土氧化物（REO）具有疏水性、化学惰性、高温稳定性和良好的机械性能，因此被选作涂层材料，并通过溶液前驱体等离子喷涂（SPPS）沉积在不锈钢基板上。研究了各种喷涂条件的影响，包括喷枪距基材表面的距离、喷枪功率、喷枪扫描次数、溶剂类型和等离子体速度。喷涂后的涂层呈现出具有层次结构的表面形貌，与自然界中发现的超疏水表面极为相似。SPPS超疏水涂层上的水接触角比光滑REO表面上的水接触角高出65%。
