Sediment challenge to promising ultra-low fouling hydrophilic surfaces in the marine environment.

Journal Article (Journal Article)

Hydrophilic coatings exhibit ultra-low fouling properties in numerous laboratory experiments. In stark contrast, the antifouling effect of such coatings in vitro failed when performing field tests in the marine environment. The fouling release performance of nonionic and zwitterionic hydrophilic polymers was substantially reduced compared to the controlled laboratory environment. Microscopy and spectroscopy revealed that a large proportion of the accumulated material in field tests contains inorganic compounds and diatomaceous soil. Diatoms adhered to the accumulated material on the coating, but not to the pristine polymer. Simulating field tests in the laboratory using sediment samples collected from the test sites showed that incorporated sand and diatomaceous earth impairs the fouling release characteristics of the coatings. When exposed to marine sediment from multiple locations, particulate matter accumulated on these coatings and served as attachment points for diatom adhesion and enhanced fouling. Future developments of hydrophilic coatings should consider accumulated sediment and its potential impact on the antifouling performance.

Full Text

Duke Authors

Cited Authors

  • Koc, J; Simovich, T; Schönemann, E; Chilkoti, A; Gardner, H; Swain, GW; Hunsucker, K; Laschewsky, A; Rosenhahn, A

Published Date

  • April 2019

Published In

Volume / Issue

  • 35 / 4

Start / End Page

  • 454 - 462

PubMed ID

  • 31088166

Electronic International Standard Serial Number (EISSN)

  • 1029-2454

International Standard Serial Number (ISSN)

  • 0892-7014

Digital Object Identifier (DOI)

  • 10.1080/08927014.2019.1611790


  • eng