Journal
FOOD HYDROCOLLOIDS
Volume 100, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2019.105411
Keywords
Bacterial nanocellulose; Silver nanoparticles; Polyvinyl alcohol; Antimicrobial packaging
Categories
Funding
- USDA NIFA Nanotechnology Program [2016-67021-24994]
- USDA Multistate Program [S1056]
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An environmentally friendly antimicrobial film was developed by incorporating silver nanoparticles (AgNPs) into bacterial nanocellulose (BNC) via reduction (R) and UV-assisted (UV) methods. By mixing with 3 wt% polyvinyl alcohol (PVA) solution, the elongation at break of the films was improved 20 times that of pure BNC film. The films exhibited higher oxygen barrier capacity with slightly improved water vapor permeability. Antimicrobial activities against Escherichia coli O157:H7 were observed from both R and UV films with up to 7 and 3 log CFU/mL of reductions in liquid medium and on raw beef, respectively. A raw beef shelf-life study suggested that the films were able to inhibit the growth of naturally present bacteria for at least 10 days at 4 degrees C. The findings of this research indicate the potential of the AgNP/PVA/BNC films for applications in food packaging.
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