Zirconia nanotube coatings - UV-resistant superhydrophobic surfaces
Raghu SNV, Chuluunbandi K, Killian M (2021)
Publication Language: English
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 26
DOI: 10.1016/j.surfin.2021.101357
Abstract
Surface modifications influence material interactions such as wettability, imparting hydrophobicity or hydrophilicity. Mainstream research focused on enhancing product shelf-life directs attention towards superhydrophobic surfaces (SHS). SHS offer several benefits for out-door applications such as self-cleaning, antisoiling, anti-mist etc. Recently, such surfaces were created by hydrophobization of anodized titania, which although effective lacked a long-term stability of their hydrophobic modifications due to it being susceptible to UV-mitigated degradation. In light of this situation, ZrO2-nanotubes are evaluated with regard to their application as transparent UV-stable superhydrophobic coatings. Nanostructured oxide surfaces are created via singlestep electrochemical anodization. The absence of HF acid-based pre-etching steps offer a safe and alternatively a green synthesis route. Anodized oxides are modified using octadecylphosphonic acid (OPA) self-assembled monolayers, demonstrate superhydrophobicity and are at par with conventionally employed coatings such as PTFE, PFDPA and PTES. The OPA-coatings are evaluated for their mechanical stability under a jet of water, chemical stability under indirect sunlight irradiation in air/water and direct UV exposure. Zirconia nanotubular films were evaluated for optical transparency using light microscopy and surface wettability of the different zirconia-composites was compared to the model system - titania. Structural and compositional differences of the SAM layer upon time dependent decay were analyzed with X-ray photoelectron spectroscopy.
Authors with CRIS profile
Khajidkhand Chuluunbandi
Professur für Electrocatalytic Interface Engineering (HIERN)
Manuela Killian
Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)
Involved external institutions
Germany (DE)How to cite
APA:
Raghu, S.N.V., Chuluunbandi, K., & Killian, M. (2021). Zirconia nanotube coatings - UV-resistant superhydrophobic surfaces. Surfaces and Interfaces, 26. https://doi.org/10.1016/j.surfin.2021.101357
MLA:
Raghu, Swathi Naidu Vakamulla, Khajidkhand Chuluunbandi, and Manuela Killian. "Zirconia nanotube coatings - UV-resistant superhydrophobic surfaces." Surfaces and Interfaces 26 (2021).
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