Studies of the antimicrobial ability and silver ions migration from silver nitrate-incorporated electrospun nylon nanofibers

Publication date: June 2018 Source:Food Packaging and Shelf Life, Volume 16 Author(s): Tien-Hsin Cheng, Shih-Bin Lin, Li-Chen Chen, Hui-Huang Chen Silver nanoparticles (AgNPs), reduced from AgNO3 in a nylon–6 solution, were immobilized through electrospinning on polypropylene (PP) to form an AgNP–nylon–6/PP package film. The AgNP–nylon–6/PP films UV/VIS spectra exhibited absorption bands at 410 and 425 nm, which were typical surface plasmon polariton resonances of the two AgNP forms. The 2–5 nm AgNPs, which were face–centered cubic crystal with (111) plane–type structures contributing to antimicrobial ability, were uniformly distributed on the nanofibers. The inhibition percentage of AgNP–nylon–6/PP composite against Escherichia coli and Staphylocccus aureus could reach 100% when the accumulative release amount of Ag+ was less than 0.62 μg/mL. The release ratio, k and n of the release kinetics evaluated by Fickian diffusion of Ag+ in food simulants were in the order of 3% acetic acid > RO water > 10% alcohol > 95% alcohol. Graphical abstract
Source: Food Packaging and Shelf Life - Category: Food Science Source Type: research