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Bioinspired aryldiazonium carbohydrate coatings: reduced adhesion of foulants at polymer and stainless steel surfaces in a marine environment
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Supplementary Information
Date
2017-12-04
Authors
Myles, Adam
Haberlin, Damien
Esteban-Tejeda, Leticia
Angione, M. Daniela
Browne, Michelle P.
Hoque, Md Khairul
Doyle, Thomas K.
Scanlan, Eoin M.
Colavita, Paula E.
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Journal ISSN
Volume Title
Publisher
American Chemical Society
Published Version
Abstract
Surface treatments that minimize biofouling in marine environments are of interest for a variety of applications such as environmental monitoring and aquaculture. We report on the effect of saccharide coatings on biomass accumulation at the surface of three materials that find applications in marine settings: stainless steel 316 (SS316), Nylon-6 (N-6), and poly(ether sulfone) (PES). Saccharides were immobilized via aryldiazonium chemistry; SS316 and N-6 samples were subjected to oxidative surface pretreatments prior to saccharide immobilization, whereas PES was modified via direct reaction of pristine surfaces with the aryldiazonium cations. Functionalization was confirmed by a combination of X-ray photoelectron spectroscopy, contact angle experiments, and fluorescence imaging of lectin–saccharide binding. Saccharide immobilization was found to increase surface hydrophilicity of all materials tested, while laboratory tests demonstrate that the saccharide coating results in reduced protein adsorption in the absence of specific protein–saccharide interactions. The performance of all three materials after modification with aryldiazonium saccharide films was tested in the field via immersion of modified coupons in coastal waters over a 20 day time period. Results from combined infrared spectroscopy, light microscopy, scanning electron and He-ion microscopy, and adenosine-triphosphate content assays show that the density of retained biomass at surfaces is significantly lower on carbohydrate modified samples with respect to unmodified controls. Therefore, functionalization and field test results suggest that carbohydrate aryldiazonium layers could find applications as fouling resistant coatings in marine environments.
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Keywords
Aryldiazonium , Carbohydrates , Coatings , Fouling , Functionalization , Marine
Citation
Myles, A., Haberlin, D., Esteban-Tejeda, L., Angione, M. D., Browne, M. P., Hoque, M. K., Doyle, T. K., Scanlan, E. M. and Colavita, P. E. (2017) 'Bioinspired aryldiazonium carbohydrate coatings: reduced adhesion of foulants at polymer and stainless steel surfaces in a marine environment', ACS Sustainable Chemistry and Engineering, 6(1), pp. 1141-1151. doi:10.1021/acssuschemeng.7b03443
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Copyright
© 2017, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry and Engineering, © American Chemical Society, after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.7b03443