Combination of the zwitterionic carboxybetaine group with various hydrophobic groups for optimizing antifouling properties against hydrophobic, hydrophilic, and biological foulants
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Zwitterionic polymer has been known to be one of the most effective low-fouling materials by virtue of its hydrophilicity. However, the antifouling performance of the zwitterionic polymers is often decreased due to the copolymerization with the hydrophobic groups for maintaining a stable coating state on the material surfaces. The aim of this study is to investigate and optimize the most effective hydrophobic group copolymerized with zwitterionic carboxybetaine in order to impart versatile antifouling properties. To demonstrate the antifouling properties of the synthesized polymer, we synthesized the copolymers composed of zwitterionic carboxybetaine methacrylate and three different types of hydrophobic monomers. The surface properties of the copolymer-coated surface including hydrophilicity and antifouling performance were analyzed. As a result, a versatile antifouling property as well as hemocompatibility was found in the carboxybetaine copolymer containing trimethylsiloxy group.