Multiple synergistic antibacterial melamine-impregnated paper based on nano Ag-doped ZIF-8

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 493; p. 152453
• Main Authors: He, Jinrong, Qu, Wei, Feng, Yun, Jiang, Jinrui, Luo, Jiaming, Wu, Yuzhang, Peng, Limin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2024
• Subjects: Antibacterial activity; Antibacterial mechanism; Melamine-impregnated paper; Reactive oxygen species; ZIF-8; Antibacterial activity; Reactive oxygen species; Melamine-impregnated paper; ZIF-8; Antibacterial mechanism
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2024.152453

[Display omitted] •A simple synthesis method has been developed for Ag@ZIF-8, involving controlling the loading and size of Ag NPs.•Ag@ZIF-8 meet the requirements for antibacterial agent used in the melamine-impregnated paper.•The multiple synergistic antibacterial mechanism of Ag@ZIF-8 was verified.•The decorated blockboards with 0.20 wt% Ag@ZIF-8 reached Level Ⅰ antibacterial grade. Melamine-impregnated paper, a decorative material in furniture and interior design, could potentially impede the spread of indoor bacteria if it possesses antibacterial properties. Here, nano Ag-doped ZIF-8 (Ag@ZIF-8) was synthesized using ion exchange and in-situ chemical reduction strategies, followed by incorporating it into melamine-impregnated paper. The ion exchange mechanism of Zn2+ and Ag+ during ion exchange reactions was investigated. The structure of Ag@ZIF-8 was well-defined, with Ag nanoparticles evenly distributed on the surface of ZIF-8. Ag@ZIF-8 showed good thermal stability at 400 °C, meeting the requirements for the hot-pressing process of the melamine-impregnated paper. Ag@ZIF-8 exhibited enhanced ROS generation under visible light compare to ZIF-8, which was attributed to its reinforced light absorption and charge carrier separation facilitated by the localized surface plasmon resonance (LSPR) effect. The antibacterial activity of Ag@ZIF-8 was better than ZIF-8, owing to the multiple-synergistic antibacterial mechanisms of the ion release and ROS generation. Specifically, the 10-Ag@ZIF-8 exhibited MIC of 128 μg/mL and 64 μg/mL against E. coli and S. aureus, respectively. The signal intensity of •O2 − induced by 10-Ag@ZIF-8 was 4.38 times higher than that of ZIF-8. As the addition of Ag@ZIF-8 increased, the antibacterial performance of melamine-impregnated paper improved. Considering the antibacterial property and economy of melamine-impregnated paper, 0.20 wt% was the optimal amount for 10-Ag@ZIF-8 decorated blockboard. This study proposes a novel approach for synthesizing MOF-based melamine-impregnated paper with antibacterial properties, aiming to reduce bacterial spread, minimize disease risks, and contribute to lowering overall healthcare costs.