Photocatalytic TiO2 coating of plastic cutting board to prevent microbial cross-contamination |
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| Affiliation: | 1. Wireless and Photonic Networks Research Centre, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, 43400 Malaysia;2. Faculty of Electrical Engineering, Czestochowa University of Technology, Armii Krajowej 17, Czestochowa, PL-42-217 Poland;3. Research Chair of Exploitation of Renewable Energy Applications in Saudi Arabia, Physics and Astronomy Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451 Saudi Arabia;4. Physics Department, Faculty of Science, Ain Sham University, Abbasia, Cairo, 11566 Egypt;5. Department of Solid State Physics, Lesya Ukrainka Eastern European National University, 13 Voli Avenue, Lutsk, 43025 Ukraine;1. Centre for Advanced Materials (CAM), Qatar University, P.O. Box 2713 Doha, Qatar;2. Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati 5678, 76001 Zlin, Czech Republic;3. Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 275, 76001 Zlin, Czech Republic;1. Chemistry Institute, State University of Campinas – UNICAMP, Campinas, Brazil;2. Department of Chemistry, Exact and Earth Science Institute, Federal University of Mato Grosso – UFMT, Cuiabá, Brazil;1. Department of Food Science and Technology, University of California - Davis, Davis, CA 95616, USA;2. Department of Chemical Engineering, Drexel University, Philadelphia, PA 19104, USA;3. Department of Nutrition and Food Science, University of Maryland-College Park, College Park, MD 20742, USA;4. Department of Biological and Agricultural Engineering, University of California - Davis, Davis, CA 95616, USA;1. Department of Electrical and Electronics Engineering, Atilim University, 06836 Ankara, Turkey;2. Department of Physics, Middle East Technical University, 06800 Ankara, Turkey |
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| Abstract: | Kitchen cutting boards are one common source of microbial cross-contamination in foods. In this study, a method was developed to create an antimicrobial coating on HDPE cutting board using UV-activated TiO2 nanoparticles (NPs). The antimicrobial efficacy of the developed coatings was tested against E. coli O157: H7 for 3 h at 0.5 ± 0.05 mW/cm2 UVA light intensity. In addition, the effect of NP loading (0.0125, 0.0625, and 0.125 mg/cm2), and surface treatment of coatings by oxygen plasma for 1–15 min on the bactericidal efficacy was investigated. Further, the bactericidal efficacy of the TiO2 coated cutting board on repeated use (i.e. 1, 2, 3 and 5 times) was also evaluated. The results showed that by increasing the NP loading from 0 to 0.125 mg/cm2 has increased the log reduction from 0.37 to 1.18 CFU/cm2. However, no significant difference (P > 0.05) in the reduction was observed between NP loadings at 0.0625 and 0.125 mg/cm2. Oxygen plasma treatment of the coated surfaces for 5–15 min significantly increased (P ≤ 0.05) the log reduction compared to control sample without plasma treatment. Under the tested conditions, TiO2 coating with 0.0625 mg/cm2 NP loading followed by oxygen plasma treatment for 5 min was found to achieve the greatest reduction up to 2.67 log CFU/cm2. Also, the coated-surfaces were found to retain the original bactericidal property even after up to 5 times washing treatment. The developed TiO2 coating on cutting board showed promise to mitigate the risk of microbial cross-contamination by providing a stable antimicrobial activity for extended use. Plasma treatment further enhanced the bactericidal property of the developed coatings without affecting physical stability. |
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| Keywords: | Cutting board Antimicrobial coating Plasma treatment |
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