Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China.
Jiangxi Center for Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, Nanchang 330201, China.
J Hazard Mater. 2021 Aug 15;416:125786. doi: 10.1016/j.jhazmat.2021.125786. Epub 2021 Apr 5.
Toward the goal of preventing microbial infections in hospitals or other healthcare institutions, here we developed a self-disinfecting textile with synergistic photodynamic/photothermal antibacterial property. Porphyrinic Metal-organic frameworks (PCN-224) and Ag nanoparticles (NPs) were in situ grown on knitted cotton textile (KCT) successively to achieve rapid photodynamic antibacterial and durable bacteriostatic effect. Light-driven singlet oxygen (O) generated from PCN-224 and heat generated from Ag could function synergistically to realize rapid bacterial inactivation. Interestingly, O could promote Ag NPs to be degraded to release more Ag ions, achieving durable bacteriostatic effect. Antibacterial assay demonstrated 6 and 4.49 log unit inactivation toward two typical bacterial strains (E. coli and S. aureus) under Xe arc lamp in 30 min, respectively. Even after ten washes, the textile still maintained 6 log unit bacterial inactivation. Mechanism study proved light-driven O and heat are main factors causing bacterial inactivation, they could work synergistically to enhance bacterial inactivation efficiency. Photothermal study revealed that the textile could reach to 69 ℃ under visible light and 79.1 ℃ under 780-nm light-laser, which showed much potential in photothermal material applications. Taken together, our findings demonstrated a synergistic self-disinfecting cotton textile that exhibited constructive significance for preventing microbial infections and transmissions.
为了实现预防医院或其他医疗机构中微生物感染的目标，我们开发了一种具有协同光动力/光热抗菌性能的自消毒纺织品。卟啉金属-有机骨架（PCN-224）和银纳米颗粒（NPs）被先后原位生长在针织棉纺织品（KCT）上，以实现快速光动力抗菌和持久抑菌效果。PCN-224 产生的光驱动单线态氧（O）和 Ag 产生的热可以协同作用，实现快速细菌失活。有趣的是，O 可以促进 Ag NPs 降解，释放更多的 Ag 离子，从而实现持久的抑菌效果。抗菌试验表明，在 Xe 弧灯下 30 min 内，该纺织品对两种典型细菌（大肠杆菌和金黄色葡萄球菌）的灭活率分别达到 6 和 4.49 log 单位。即使经过十次洗涤，该纺织品仍能保持 6 log 单位的细菌灭活。机制研究证明，光驱动的 O 和热是导致细菌失活的主要因素，它们可以协同作用，提高细菌失活效率。光热研究表明，该纺织品在可见光下可达到 69℃，在 780nm 激光下可达到 79.1℃，这在光热材料应用方面具有很大的潜力。综上所述，我们的研究结果表明，这种协同的自消毒棉纺织品在预防微生物感染和传播方面具有重要意义。
