Ageing behavior of acrylic polyurethane varnish coating in artificial weathering environments |
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| Authors: | Jianwen Hu Xiaogang Li Jin Gao Quanlin Zhao |
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| Affiliation: | aMaterials Science and Engineering School, Hebei University of Science and Technology, Shijiazhuang, 050054, People's Republic of China;bMaterials Science and Engineering School, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China;cDepartment of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, People's Republic of China |
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| Abstract: | Polyurethane-based coatings reinforced by ZnO nanoparticles (about 27 nm) were prepared via solution blending. The ZnO/PU films and coats were fabricated by a simple method of solution casting and evaporation. The mechanical properties of the films were investigated by a universal material test, and the abrasion resistance of the prepared coats was evaluated by a pencil-abrasion-resistance tester. It was found that significant improvement of the PU films in Young’s modulus and tensile strength was achieved by incorporating ZnO nanoparticles up to 2.0 wt%, and that the abrasion resistance of the PU coats was greatly enhanced due to the addition of ZnO nanoparticles. Moreover, the antibacterial property test was carried out via the agar dilution method and the result indicated that PU films doped with ZnO nanoparticles showed excellent antibacterial activity, especially for Escherichia coli. |
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| Keywords: | ZnO nanoparticles Polyurethanes Mechanical property Abrasion resistance Antibacterial property |
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