Novel pH‐responsive mixed‐charge copolymer brushes based on carboxylic acid and quaternary amine monomers |
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| Authors: | Serkan Demirci Selin Kinali‐Demirci Tuncer Caykara |
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| Institution: | 1. Department of Chemistry, Faculty of Arts and Sciences, Amasya University, Amasya 05100, Turkey;2. Department of Chemistry, Faculty of Science, Gazi University, Ankara 06500, Turkey |
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| Abstract: | In this study, we report on the fabrication of tunable mixed‐charged copolymer brushes consisting of negatively charged carboxylic acid monomer (4‐vinylbenzoic acid, VBA) and positively charged quaternary amine monomer ((ar‐vinylbenzyl)trimethylammonium chloride) via reversible addition–fragmentation chain transfer‐mediated polymerization. The copolymer brushes have negative charge under neutral and basic conditions, and are positively charged under acidic conditions owing to the protonation of the carboxylate groups. The copolymer brushes revealed a unique reversible wetting behavior with pH. The reversible properties of the copolymer brushes can be employed to regulate the adsorption of charged biomacromolecules such as DNA and proteins. © 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013 |
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| Keywords: | copolymer brushes mixed‐charge surfaces reversible addition‐fragmentation chain transfer (RAFT) polymerization stimuli‐sensitive polymers surfaces |
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