Abstract
Sustainable poly(lactic acid) (PLA)/propylparaben (PPB) composite based films were fabricated via solution casting approach. The assessment of PLA/PPB composite films in terms of active food packaging characteristics like thermal, mechanical, UV–Vis, oxygen barrier, anti-bacterial as well as anti-oxidant effect is carried out. The PLA/PPB-5 composite film resulted in three-fold (23%) increase of elongation-at-break while maintaining a tensile strength (42 MPa) in comparison with PLA film. Consequently, the PLA/PPB-5 composite film displayed a 70% UV–B blockage and reduced the oxygen transmission rate by 52% as compared to PLA film. Further, the PLA/PPB-5 composite film exhibited significant improvement (52%) in the radical scavenging activity which can be really helpful to keep the food products fresh for longer periods. The PLA/PPB filler showed good antibacterial activity against food-borne bacteria [Staphylococcus aureus and Escherichia coli]. The fabricated PLA/PPB composite films have shown desirable active food packaging characteristics and therefore may be suitable for food packaging applications.
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Acknowledgements
The authors sincerely thanks Council of Scientific and Industrial Research (CSIR), India and The World Academy of Science (TWAS), Italy for post graduate fellowship (Grant No: 22/FF/CSIR-TWAS/2018) to carryout doctoral research at CSIR-CECRI, India. The corresponding author “Ravi Babu Valapa” sincerely thanks SERB, DST for financial support under EMEQ scheme (Grant: no: EEQ/2019/000451) and CSIR-HQ for funding under “AEISS theme” (Grant no: MLP 0318). Sravanthi Loganathan sincerely thanks Department of Science and Technology, Govt. of India for funding this research under DST INSPIRE FACULTY Scheme (Grant no: DST/INSPIRE/04/2017/000704). All the authors acknowledge Central Instrumentation Facility (CIF) at CSIR-CECRI for providing characterization facilities.
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UL: experiments, characterization, data collection, formal analysis, validation, and preparation of original draft. VR: characterization, analysis, writeup—review and editing. AG: characterization, analysis, writeup—review and editing. SL: resources and writeup—review and editing. RBV: Conceptualization, supervision, resources, writeup—review and editing and funding acquisition.
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Lawal, U., Robert, V., Gopi, A. et al. Fabrication and Characterization of Poly (Lactic acid)/Propylparaben Composite for Active Food Packaging Application. J Polym Environ (2024). https://doi.org/10.1007/s10924-023-03145-w
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DOI: https://doi.org/10.1007/s10924-023-03145-w