Antibacterial activity study of ZnO incorporated biodegradable poly (lactic acid) films for food packaging applications
In this report, the antibacterial activity of pure polylactic acid (PLA), Zinc oxide (ZnO) incorporated PLA, and ZnO nanorods grown on the ZnO incorporated PLA films prepared by a simple film casting method was studied. ZnO nanorods were grown on ZnO mixed PLA films by a simple hydrothermal method a...
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Published in: | Polymer bulletin (Berlin, Germany) Germany), 2023-02, Vol.80 (2), p.1369-1384 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | In this report, the antibacterial activity of pure polylactic acid (PLA), Zinc oxide (ZnO) incorporated PLA, and ZnO nanorods grown on the ZnO incorporated PLA films prepared by a simple film casting method was studied. ZnO nanorods were grown on ZnO mixed PLA films by a simple hydrothermal method at 80 °C temperature. The SEM study confirms the formation of ZnO nanorods on PLA. The length and diameter of nanorods are approximately 2–3 µm and 500 nm, respectively. The high elemental percentage of Zn and O was observed in the energy-dispersive spectra of ZnO nanorods grown ZnO mixed PLA film due to the presence of ZnO nanorods on the surface of the film. The TGA analysis has shown thermal stability enhancement by approximately 10 °C in the ZnO nanorods grown film compared to pure PLA film. Furthermore, the antibacterial activity of these films was tested against
Escherichia coli
(
E
.
coli
) bacteria and
Staphylococcus aureus
(
S
.
aureus
) bacteria. The zone of inhibition values for pure PLA, ZnO incorporated PLA, and ZnO nanorods grown films are 0, 16, 19 mm and 0, 18, 21 mm for
E. coli
and
S. aureus,
respectively. More antibacterial activity was observed for the film containing ZnO nanorods on its surface than the pure PLA and ZnO mixed PLA films. This process of growing ZnO nanorods on PLA film surfaces can be easily adapted to large-scale production for packaging applications.
Graphical abstract |
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ISSN: | 0170-0839 1436-2449 |
DOI: | 10.1007/s00289-022-04126-0 |