Effects of surface-active block copolymers with oxyethylene and fluoroalkyl side chains on the antifouling performance of silicone-based films

Biofouling
Elisa MartinelliGiancarlo Galli

Abstract

Block copolymers made from a poly(dimethyl siloxane) (Si) and a poly(meth)acrylate carrying oxyethylene (EG) or fluoroalkyl (AF) side chains were synthesized and incorporated as surface-active components into a silicone matrix to produce cross-linked films with different surface hydrophilicity/phobicity. Near-edge X-ray absorption fine structure (NEXAFS) studies showed that film surfaces containing Si-EG were largely populated by the siloxane, with the oxyethylene chains present only to a minor extent. In contrast, the fluorinated block was selectively segregated to the polymer-air interface in films containing Si-AF as probed by NEXAFS and X-ray photoelectron spectroscopy (XPS) analyses. Such differences in surface composition were reflected in the biological performance of the coatings. While the films with Si-EG showed a higher removal of both Ulva linza sporelings and Balanus amphitrite juveniles than the silicone control, those with Si-AF exhibited excellent antifouling properties, preventing the settlement of cyprids of B. amphitrite.

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Citations

Mar 8, 2017·Macromolecular Rapid Communications·Giancarlo Galli, Elisa Martinelli
Jun 8, 2019·Annual Review of Chemical and Biomolecular Engineering·Amanda K Leonardi, Christopher K Ober
Feb 6, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Peng HuGuangzhao Zhang
Aug 27, 2021·Science·Abhishek DhyaniAnish Tuteja

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Methods Mentioned

BETA
X-ray
NMR

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