E. Schönemann, J. Koc, N. Aldred, A. S. Clare, A. Laschewsky, A. Rosenhahn, E. Wischerhoff
Synthesis of Novel Sulfobetaine Polymers with Differing Dipole Orientations and Their Effects on the Antifouling Properties
Macromol. Rapid Commun. 2020, 41, [1900447]
DOI: 10.1002/marc.201900447
Incited by the ongoing discussion about differences in the binding behavior of natural zwitterionic phosphatidylcholines compared to the one of non-natural isomeric choline phosphates, we investigated the effect of the molecular orientation of zwitterionic sulfobetaine groups on the anti-fouling performance of thin polymer hydrogel films. To this end, we designed an isomeric set of three photocurable poly(sulfobetaine methacrylate)s, in which the positions of the cationic and the anionic groups relative to the polymer backbone were systematically altered. The effect of the varied segmental dipole orientation onto their water solubility, wetting of their films by water, and their fouling resistance against model proteins as well as typical marine fouling organisms was studied. The results demonstrate the important role of the orientation of a given zwitterionic group on the specific behavior of the polymers including their fouling resistance.
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