Novel silver-modified carboxymethyl chitosan antibacterial membranes using environment-friendly polymers. (November 2022)

• Record Type: Journal Article
• Authors: Li, Qirun; Jiang, Shanxue; Jia, Wenting; Wang, Fang; Wang, Zeru; Cao, Xinyue; Shen, Xianbao; Yao, Zhiliang
• Is Part Of: Chemosphere. Volume 307:Part 3(2022)
• Publication Date: 2022-11
• Subjects: Eco-friendly polymer -- Antibacterial membrane -- Ion exchange -- Carboxymethyl chitosan -- Zone of inhibition -- Food safety; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.136059
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: The rapid reproduction of foodborne bacteria in food packaging threatens the health of consumers, the massive use and waste of packaging also causes serious environmental pollution. In this study, novel biodegradable antibacterial membranes based on silver-modified carboxymethyl chitosan (Ag-CMCS) were prepared. Polylactic acid (PLA) and polybutylene adipate- co -terephthalate (PBAT) were used as the base membrane materials. Characterization of the prepared membranes was performed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS), water contact angle, and so on. Especially, the silver on the surface of Ag-CMCS was proved to be metallic silver. For the first cycle of zone of inhibition test, the diameter of inhibition zone could reach up to 17 mm while the mass of silver released was negligible. The prepared antibacterial membranes could kill almost 100% of bacteria under certain conditions and inhibition zone still existed after more than 7 cycles of tests, indicating the prepared antibacterial membranes were effective. This study could provide new ideas for preparing efficient and environment-friendly antibacterial food packaging membranes. Graphical abstract: Image 1 Highlights: Silver modified carboxymethyl chitosan is used to prepare antibacterial membranes. The base membrane materials and antibacterial particles are biodegradable. The prepared antibacterial membranes show effective antibacterial performance.