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Preparation and characterization of polyurethane based self-cleaning and antibacterial coating containing silver ion exchanged montmorillonite/TiO2 nanocomposite

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Abstract

In order to reach an antibacterial, photocatalytic, and hydrophilic coating, commercial grade polyurethane (CPU) resin was modified with silver ion exchanged montmorillonite/TiO2 nanocomposite in various montmorillonite to TiO2 nanoparticle ratios. To characterize the prepared nanocomposites and coatings, X-ray diffraction patterns, FTIR and UV–Vis spectroscopy and SEM images were used. The modified commercial grade polyurethane coatings containing nanocomposites show better properties, including hydrophilicity, degradation of organic pollutants, antibacterial activity and water resistivity, compared to unmodified commercial grade polyurethane coatings. The water droplet contact angle of unmodified CPU coating was 70°, however it decreased to lower than 10° in modified CPU coatings after 24 h LED lamp irradiation. Decolorization efficiency of malachite green dye solution by the use of modified CPU coatings achieved up to 70% after 5 h LED lamp illumination, compared to less than 5% for unmodified CPU coatings. Modified CPU coatings also showed significant water resistivity and antibacterial properties.

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Acknowledgements

This work was supported by the University of Tabriz.

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Authors and Affiliations

  1. Polymer Composite Research Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran

    Ali Olad, Fereshteh Rezvani & Rahimeh Nosrati

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  1. Ali Olad
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  2. Fereshteh Rezvani
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  3. Rahimeh Nosrati
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Correspondence to Ali Olad.

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Olad, A., Rezvani, F. & Nosrati, R. Preparation and characterization of polyurethane based self-cleaning and antibacterial coating containing silver ion exchanged montmorillonite/TiO2 nanocomposite. Res Chem Intermed 44, 1711–1727 (2018). https://doi.org/10.1007/s11164-017-3193-z

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  • DOI: https://doi.org/10.1007/s11164-017-3193-z

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