Instant Tuning of Superhydrophilic to Robust Superhydrophobic and Self-Cleaning Metallic Coating: Simple, Direct, One-Step, and Scalable Technique

Autor:	Anup Kumar Keshri, Biswajyoti Mukherjee, Aminul Islam, O.S. Asiq Rahman
Rok vydání:	2019
Předmět:	Contact angle Materials science chemistry Superhydrophilicity Aluminium chemistry.chemical_element General Materials Science Atmospheric-pressure plasma One-Step Surface finish Wetting Composite material Microstructure
Zdroj:	ACS Applied Materials & Interfaces. 11:4616-4624
ISSN:	1944-8252 1944-8244
Popis:	We present a simple, direct, one-step, scalable technique for instant tuning of all the different states of wetting characteristics using atmospheric plasma spray (APS) technique. We observed that, just by changing the process parameters in the APS technique, the wetting characteristics of an intrinsically hydrophilic aluminum metallic surface can be tuned to superhydrophilic (contact angle (CA): 0°), hydrophilic (CA: 19.6°), hydrophobic (CA: 97.6°), and superhydrophobic (CA: 156.5°) surfaces. Also, tuned superhydrophobic surface showed an excellent self-cleaning property. Further, we demonstrated that these surfaces retain their superhydrophobic nature even after exposure at elevated temperatures (up to 773 K) and on application of mechanical abrasion. Manipulation in different wetting behavior was possible mainly due to the presence of varying degrees of smooth surface as well as micropillars, which incorporated the multiscale roughness to the surface. "Re-entrant"-like microstructures such as mushroom, cauliflower, and cornet microstructures were observed in the case of tuned superhydrophobic surface, which is well-known for achieving the excellent water repellency over the hydrophilic surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f68d8bf42daa8f038b2cbb79b07aa1d https://doi.org/10.1021/acsami.8b19045 Zobrazit plný text záznamu