NIR-responsive waterborne polyurethane-polydopamine coatings for light-driven disinfection of surfaces

Alkan Taş, Buket and Berksun, Ekin and Taş, Cüneyt Erdinç and Ünal, Serkan and Ünal, Hayriye (2022) NIR-responsive waterborne polyurethane-polydopamine coatings for light-driven disinfection of surfaces. Progress in Organic Coatings, 164 . ISSN 0300-9440 (Print) 1873-331X (Online)

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Apart from conventional chemical-based methods, alternative disinfection methods that can physically destroy bacteria are needed. Here, biocompatible, non-toxic, environmentally friendly hybrid coatings prepared from dispersions of polydopamine-coated waterborne polyurethane particles (WPU-PDA) that offer effective light-to-heat conversion were designed to eradicate pathogenic bacteria and biofilms using photothermal therapy. The resulting WPU-PDA hybrid coatings demonstrated an effective photothermal activity by reaching 155 °C under 4 min NIR-laser irradiation and staying stable upon multiple irradiation cycles. WPU-PDA coatings induced hyperthermia on S. aureus resulting in a 3.5 log reduction of viable cells with a killing activity that is stable for at least 20 contamination/disinfection cycles. Furthermore, the prepared coatings were shown to have antibiofilm properties resulting in a 3 min NIR-light activated 3.9 log reduction in the viability through physical disruption of biofilm bacteria. Light-activated antibacterial/antibiofilm coatings demonstrated here provide a strong potential for NIR-light activated disinfection of surfaces.
Item Type: Article
Uncontrolled Keywords: Antibacterial/antibiofilm coating; NIR laser light; Photothermal therapy; Polydopamine; Waterborne polyurethane (WPU)
Divisions: Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Integrated Manufacturing Technologies Research and Application Center
Depositing User: Serkan Ünal
Date Deposited: 25 Aug 2022 22:21
Last Modified: 25 Aug 2022 22:21

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