Optically transparent glass with antifogging and antibacterial properties is in high demand for endoscopes, goggles, and medical display equipment. However, many of the previously reported coatings have limitations in terms of long-term antifogging and efficient antibacterial properties, environmental friendliness, and versatility. In this study, inspired by catfish and sphagnum moss, a novel photoelectronic synergy antifogging and antibacterial coating was prepared by cross-linking polyethylenimine-modified titanium dioxide (PEI-TiO₂), polyvinylpyrrolidone (PVP), and poly(acrylic acid) (PAA). The as-prepared coating could remain fog-free under hot steam for more than 40 min. The experimental results indicate that the long-term antifogging properties are due to the water absorption and spreading characteristics. Moreover, the organic–inorganic hybrid of PEI and TiO₂ was first applied to enhance the antibacterial performance. The Staphylococcus aureus and the Escherichia coli growth inhibition rates of the as-prepared coating reached 97 and 96% respectively. A photoelectronic synergy antifogging and antibacterial mechanism based on the positive electrical and photocatalytic properties of PEI-TiO₂ was proposed. This investigation provides insight into designing multifunctional bioinspired surface materials to realize antifogging and antibacterial that can be applied to medicine and daily lives.

中文翻译：

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具有防雾抗菌性能的仿生光电协同涂层


内窥镜、护目镜和医疗显示设备对具有防雾和抗菌性能的光学透明玻璃的需求量很大。然而，之前报道的许多涂料在长期防雾和高效抗菌性能、环境友好性和多功能性方面都存在局限性。本研究受鲶鱼和水苔的启发，通过交联聚乙烯亚胺改性二氧化钛（PEI-TiO ₂ ）、聚乙烯吡咯烷酮（PVP）和聚苯乙烯，制备了一种新型光电协同防雾抗菌涂层。 （丙烯酸）（PAA）。所制备的涂层在热蒸汽下可保持40分钟以上无雾。实验结果表明，长期防雾性能归因于吸水和铺展特性。此外，首次应用PEI和TiO ₂ 的有机-无机杂化来增强抗菌性能。所制备的涂层对金黄色葡萄球菌和大肠杆菌的生长抑制率分别达到97%和96%。提出了一种基于PEI-TiO ₂ 正电和光催化性能的光电协同防雾抗菌机理。这项研究为设计多功能仿生表面材料提供了见解，以实现可应用于医学和日常生活的防雾和抗菌功能。