Antimicrobial polyurethane synthetic leather coating with In-situ generated Nano-TiO2 |
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Authors: | Yi Chen Lidan Yan Rui Wang Haojun Fan Qiyi Zhang |
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Institution: | (1) Kuvin Centre and Department of Microbiology and Molecular Genetics, Hebrew University, P.O. Box 12272, Jerusalem, 91120, Israel;(2) Bakh Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, 117071 Moscow, Russia;(3) Department of Neuroscience, Columbia University, 1051 Riverside Drive, New York, NY 10032, USA;(4) Institute of Biological Environmental and Rural Sciences, University of Wales, Aberystwyth, Ceredigion, SY23 3DD, UK; |
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Abstract: | By incorporating organic-inorganic nano-hybridization into wet phase inversion coating-forming method, a novel antimicrobial
polyurethane synthetic leather coating with in-situ generated nano-TiO2 (PUT) was prepared. The antibacterial activity against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Micrococcus luteus, antifungal activity against Aspergillus niger and toxicity of this PUT coating were investigated respectively. Experimental results showed that the antimicrobial activity
of the PUT coating increased with increasing nano-TiO2 concentration. Low nano-TiO2 concentration (≤0.50 wt%) resulted in negligible or limited antimicrobial activity. When the nano-TiO2 concentration increased up to 0.75 and 1.00 wt%, the antibacterial activity of the PUT coating exceeded 82 and 93 % respectively,
and no Aspergillus niger growth was observed on the coating surface within 28 days. Cell culture assay indicated that the PUT coating had no detrimental
effect on the morphologies and proliferation rate of normal human dermal fibroblasts, which indicated a non-toxic and skin-friendly
characteristic. According to these results, the PUT coating was capable of reducing the risk of microbial contamination while
remained skin-friendly to wearers. More importantly, the organic-inorganic nano-hybridization technique developed in this
study was carried out simultaneously during the established wet phase inversion coating-forming method for PU leather manufacture,
which promised its possible application on an industrial scale. |
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