Li Manna, Chen Zhaofeng, Yang Lixia, Li Jiayu, Xu Jiang, Chen Chao, Wu Qiong, Yang Mengmeng, Liu Tianlong
International Laboratory for Insulation and Energy Efficiency Materials, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Nanomaterials (Basel). 2022 May 29;12(11):1857. doi: 10.3390/nano12111857.
A GO (graphene oxide)/ZnO/CuO antibacterial coating was successfully sprayed on the ultrafine glass fibers using room temperature hydrothermal synthesis and air spraying techniques. The microstructures of the antibacterial coating were characterized, and the results showed that the CuONPs (nano particles)/ZnONPs were uniformly dispersed on the surface of GO. Then, the antibacterial properties of the GO/ZnO/CuO (GZC) antibacterial coating were evaluated using the disc diffusion test. It was found that the coating exhibits excellent antibacterial properties and stability against and , and the antibacterial rate of each group of antibacterial powder against Staphylococcus aureus () and Escherichia coli () was 100%. To explore the antibacterial mechanism of the GZC antibacterial powder on the ultrafine glass fibers based on the photocatalysis/oxidative stress method, the photoelectric coupling synergistic effect between GZC antibacterial coating was analyzed deeply. The results all showed that the photochemical activity of GZC antibacterial powder was significantly improved compared with pure component materials. The enhancement of its photochemical activity is beneficial to the generation of ROS (including hydroxyl radicals, superoxide anion radicals, etc.), which further confirms the speculation of the photocatalytic/oxidative stress mechanism.
采用室温水热合成法和空气喷涂技术，成功地在超细玻璃纤维上喷涂了氧化石墨烯（GO）/氧化锌（ZnO）/氧化铜（CuO）抗菌涂层。对该抗菌涂层的微观结构进行了表征，结果表明，氧化铜纳米颗粒（CuONPs）/氧化锌纳米颗粒（ZnONPs）均匀分散在氧化石墨烯表面。然后，采用纸片扩散法评估了氧化石墨烯/氧化锌/氧化铜（GZC）抗菌涂层的抗菌性能。结果发现，该涂层对金黄色葡萄球菌（ ）和大肠杆菌（ ）表现出优异的抗菌性能和稳定性，每组抗菌粉末对金黄色葡萄球菌和大肠杆菌的抗菌率均为100%。为基于光催化/氧化应激法探究GZC抗菌粉末在超细玻璃纤维上的抗菌机制，深入分析了GZC抗菌涂层之间的光电耦合协同效应。结果均表明，与纯组分材料相比，GZC抗菌粉末的光化学活性显著提高。其光化学活性的增强有利于活性氧（包括羟基自由基、超氧阴离子自由基等）的产生，进一步证实了光催化/氧化应激机制的推测。
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