Silicone-Based Lubricant-Infused Slippery Coating Covalently Bound to Aluminum Substrates for Underwater Applications

Prado L, Böhringer D, Mazare AV, Sotelo L, Sarau G, Christiansen S, Fabry B, Schmuki P, Virtanen S, Goldmann W, Tesler A (2023)

Publication Type: Journal article

Publication year: 2023

Journal

ACS Applied Materials and Interfaces American Chemical Society

DOI: 10.1021/acsami.3c04508

Abstract

Wetting of solid surfaces is crucial for biological and industrial processes but is also associated with several harmful phenomena such as biofouling and corrosion that limit the effectiveness of various technologies in aquatic environments. Despite extensive research, these challenges remain critical today. Recently, we have developed a facile UV-grafting technique to covalently attach silicone-based coatings to solid substrates. In this study, the grafting process was evaluated as a function of UV exposure time on aluminum substrates. While short-time exposure to UV light results in the formation of lubricant-infused slippery surfaces (LISS), a flat, nonporous variant of slippery liquid-infused porous surfaces, longer exposure leads to the formation of semi-rigid cross-linked polydimethylsiloxane (PDMS) coatings, both covalently bound to the substrate. These coatings were exposed to aquatic media to evaluate their resistance to corrosion and biofouling. While the UV-grafted cross-linked PDMS coating effectively inhibits aluminum corrosion in aquatic environments and allows organisms to grow on the surface, the LISS coating demonstrates improved corrosion resistance but inhibits biofilm adhesion. The synergy between facile and low-cost fabrication, rapid binding kinetics, eco-friendliness, and nontoxicity of the applied materials to aquatic life combined with excellent wetting-repellent characteristics make this technology applicable for implementation in aquatic environments.

Authors with CRIS profile

Lucia Prado Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) David Böhringer Lehrstuhl für Biophysik Anca Valentina Mazare Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Ben Fabry Lehrstuhl für Biophysik Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Sannakaisa Virtanen Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Wolfgang Goldmann Lehrstuhl für Biophysik Alexander Tesler Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)

Involved external institutions

Innovations-Institut für Nanotechnologie und korrelative Mikroskopie e.V. (INAM) / Institute for Nanotechnology and Correlative Microscopy DE Germany (DE)

How to cite

APA:

Prado, L., Böhringer, D., Mazare, A.V., Sotelo, L., Sarau, G., Christiansen, S.,... Tesler, A. (2023). Silicone-Based Lubricant-Infused Slippery Coating Covalently Bound to Aluminum Substrates for Underwater Applications. ACS Applied Materials and Interfaces. https://doi.org/10.1021/acsami.3c04508

MLA:

Prado, Lucia, et al. "Silicone-Based Lubricant-Infused Slippery Coating Covalently Bound to Aluminum Substrates for Underwater Applications." ACS Applied Materials and Interfaces (2023).

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