J. Koc, E. Schönemann, R. Wanka, N. Aldred, A. S. Clare, H. Gardner, G. W. Swain, K. Hunsucker, A. Laschewsky, A. Rosenhahn
Effects of crosslink density in zwitterionic hydrogel coatings on their antifouling performance and susceptibility to silt uptake.
Biofouling 2020, 36, 646-659
DOI: 10.1080/08927014.2020.1796983
Zwitterionic hydrogels excel as antifouling coatings against the attachment of proteins and organisms in laboratory assays. This is largely attributed to their high hydrophilicity and swelling in water. However in field experiments in the ocean, the soft coatings suffer from the incorporation of particulate matter, strongly deteriorating the anti-fouling performance. In this study, we investigate comparatively the effect of increasing amounts of photo-crosslinker in hydrogels made from a sulfobetaine methacrylate in laboratory assays as well as in fields tests. Surprisingly in both cases, the fouling resistance was improved by increasing the crosslinker content, and this throughout all types of foulant (proteins, diatoms, microalgae) studied.
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