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Zwitterionic Surface Modification of Polyethylene via Atmospheric Plasma-induced Polymerization of (Vinylbenzyl-)sulfobetaine and Evaluation of Antifouling Properties by Nils Burmeister; Christel Vollstedt; Cathrin Kröger; Timo Friedrich; Nico Scharnagl; Marcus Rohnke; Eilika Zorn; Sebastian G. Wicha; Wolfgang R. Streit; Wolfgang Maison is a Materials Science article available to read on EtoBox.

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Zwitterionic polymer brushes were grafted from bulk polyethylene (PE) by air plasma activation of the PE surface followed by radical polymerization of the zwitterionic styrene derivative (vinylbenzyl)sulfobetaine (VBSB). Successful formation of dense poly-(VBSB)-brush layers was confirmed by goniometry, IR spectroscopy, XPS and ToF-SIMS analysis. The resulting zwitterionic layers are about 50–100 nm thick and cause extremely low contact angles of 10° (water) on the material. Correspondingly we determined a high density of > 1.0 × 1016 solvent accessible zwitterions/cm2 (corresponding to 2,0 *10-8 mol/cm2) by a UV-based ion-exchange assay with crystal violet. The elemental composition as determined by XPS and characteristic absorption bands in the IR spectra confirmed the presence of zwitterionic sulfobetaine polymer brushes. The antifouling properties of the resulting materials were evaluated in a bacterial adhesion test against gram-positive bacteria (S. aureus). We observed significantly reduced cellular adhesion of the zwitterionic material compared to pristine PE. These microbiological tests were complemented by tests in natural seawater. During a test period of 21 days, confoc

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Author

Nils Burmeister; Christel Vollstedt; Cathrin Kröger; Timo Friedrich; Nico Scharnagl; Marcus Rohnke; Eilika Zorn; Sebastian G. Wicha; Wolfgang R. Streit; Wolfgang Maison

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)