Competing with barnacle cement: wetting resistance of a re-entrant surface reduces underwater adhesion of barnacles

Petersen, Dennis S., Kleinteich, Thomas, Gorb, Stanislav and Heepe, Lars (2018) Competing with barnacle cement: wetting resistance of a re-entrant surface reduces underwater adhesion of barnacles Journal of The Royal Society Interface, 15 (145). p. 20180396. DOI 10.1098/rsif.2018.0396.

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Abstract

Surfaces with re-entrant topographies can repel liquids even of extremely low surface tension, almost independently of the material's inherent wettability. We show that this topography-based wetting resistance can also be applied to underwater applications, reducing the permanent adhesion of marine hardfouling organisms. Having combined a biofouling assay in the marine environment with microscopic analyses, we demonstrate how a synergistic effect of a soft silicone-based material with a re-entrant mushroom-shaped surface topography strongly increases the fouling release ability of such coatings compared with a smooth control made from the same material. Our coating inhibited the complete wetting of the solidifying glues produced by marine organisms, which resulted in a decreased contact area and, consequently, low adhesion. Our work suggests that topography-induced wetting resistance of surfaces may become a viable approach in preventing permanent adhesion of marine hardfouling organisms.

Document Type: Article
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
DOI etc.: 10.1098/rsif.2018.0396
ISSN: 1742-5689
Projects: Future Ocean
Date Deposited: 04 Feb 2019 12:08
Last Modified: 04 Feb 2019 12:08
URI: http://eprints.uni-kiel.de/id/eprint/45680

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