Self-assembly of ZnO nanoparticles on Low-Density Polyethylene Film with sol- gel and its Application for Milk Active Packaging

Subject Areas : Polymer, Composites and Polymerization Processes

Mohammad Ali Shayegh ¹ ( Nabandishan Saynar Sanaat isatis Co., Yazd Science and Technology Park, Yazd, Iran. )
sayedehmona Alavinassab ² ( Nabandishan Saynar Sanaat isatis Co., Yazd Science and Technology Park, Yazd, Iran )
Somayeh Shahedi ³ ( Nanokimiakavir Yazd Co., Yazd Science and Technology Park, Yazd, Iran )
Saeid Jafari ⁴ ( Nanokimiakavir Yazd Co., Yazd Science and Technology Park, Yazd, Iran )

Received: 2022-12-19 Accepted : 2023-04-15 Published : 2023-06-01

Keywords: S. aureus, E. coli, sol-gel, Zinc Oxide, Antibacterial Package,

Abstract :

This study reports the antibacterial capability of low-density polyethylene (LDPE) modified with ZnO nanoparticles using a Sol-Gel technique. Antibacterial activity of prepared films against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was examined. The operational conditions such as pH, time, amount of ZnO nanoparticles, and silanol concentration were optimized using the response surface methodology (RSM). The proposed film under optimum conditions was applied for the packaging of the milk sample. The highest antibacterial activity of ZnO/LPDE were pH (6.0), time (103 min), amount of ZnO nanoparticles (0.68 % w/v) and silanol agent concentration (4.81 % v/v). The antibacterial properties of ZnO/LDPE films were assessed based on the diameter of the inhibition zone in a disk diffusion test against E. coli and S. aureus. These films have significantly reduced the growth of mentioned bacteria. Overall, antimicrobial packaging shows promise as an effective method to inhibit the growth of certain bacteria like E. coli and S. aureus in milk. The resulting ZnO/LDPE package films containing milk samples exhibit superior and prolonged antibacterial activity against E. coli and S. aureus in 7 and 14 days.

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