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Polydimethylsiloxane (PDMS)-based antibacterial organic–inorganic hybrid coatings

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Abstract

UV-curable antibacterial organic–inorganic hybrid coatings were prepared by sol–gel method. Triethoxysilane-terminated poly(dimethylsiloxane) (TESi-PDMS) as a new coupling agent to improve the compatibility between organic and inorganic phases was synthesized. PDMS-based urethane methacrylate oligomer was obtained by reacting isophorone diisocyanate with hydroxyethyl methacrylate and hydroxyl-terminated PDMS. The formulations were applied onto polycarbonate panels and then cured by UV radiation. Physical properties of UV-cured free films such as gel content, stress–strain, and conversion of acrylate double bond were examined. In addition, the antibacterial effects of the coatings were investigated. Nanosilver-containing formulations exhibited high antibacterial effect against Escherichia coli and Staphylococcus aureus. Thermogravimetric analysis indicated that thermal stability of the hybrids was significantly higher than the organic polymer. Contact angle measurement showed that addition of silane precursor increased the contact angle from 95° to 110°.

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Acknowledgments

This work was supported by Marmara University, Commission of Scientific Research Project under grant FEN-C-YLP-070211-0008.

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  1. Department of Chemistry, Faculty of Art & Science, Marmara University, Göztepe, 34722, Istanbul, Turkey

    Burcu Oktay & Nilhan Kayaman-Apohan

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  1. Burcu Oktay
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Correspondence to Nilhan Kayaman-Apohan.

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Oktay, B., Kayaman-Apohan, N. Polydimethylsiloxane (PDMS)-based antibacterial organic–inorganic hybrid coatings. J Coat Technol Res 10, 785–798 (2013). https://doi.org/10.1007/s11998-013-9505-3

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