Fouling-Release Properties of Dendritic Polyglycerols against Marine Diatoms

Wanka, R. and Finlay, J.A. and Nolte, K.A. and Koc, J. and Jakobi, V. and Anderson, C. and Clare, A.S. and Gardner, H. and Hunsucker, K.Z. and Swain, G.W. and Rosenhahn, A.

Volume: 10 Pages: 34965-34973
DOI: 10.1021/acsami.8b12017
Published: 2018

Dendritic polyglycerols (PGs) were grafted onto surfaces using a ring-opening polymerization reaction, and the fouling-release properties against marine organisms were determined. The coatings were characterized by spectroscopic ellipsometry, contact angle goniometry, ATR-FTIR, and stability tests in different aqueous media. A high resistance toward the attachment of different proteins was found. The PG coatings with three different thicknesses were tested in a laboratory assay against the diatom Navicula incerta and in a field assay using a rotating disk. Under static conditions, the PG coatings did not inhibit the initial attachment of diatoms, but up to 94% of attached diatoms could be removed from the coatings after exposure to a shear stress of 19 Pa. Fouling release was found to be enhanced if the coatings were sufficiently thick. The excellent fouling-release properties were supported in dynamic field-immersion experiments in which the samples were continually exposed to a shear stress of 0.18 Pa. © 2018 American Chemical Society.

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