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Antibacterial poly(lactic acid) (PLA) films grafting electrospun PLA/Ally isothioscyanate (AITC) fibers for food packaging
- Hasan H. Kara, Fugang Xiao, Majher Sarker, Tony Z. Jin, Ana M. M. Sousa, Cheng-Kung Liu, Peggy M. Tomasula, LinShu Liu
- Journal of applied polymer science 2015 v.Article 42475 pp. -
- Escherichia coli, Listeria innocua, air, allyl isothiocyanate, antibacterial properties, bacterial contamination, cold, encapsulation, food contamination, food packaging, foods, growth retardation, mechanical properties, packaging films, polymers, scanning electron microscopy, temperature, washing
- Poly(lactic acid) (PLA) fibers of submicron sizes encapsulating allyl isothiocyanate (AITC) (PfA) were made and electrospun onto the surfaces of PLA films (PfA-g-film). SEM examination confirmed that the fibers were grafted to the PLA film after the (PfA-g-film) underwent air blowing and water washing. The PfA-g-films retained the mechanical properties of PLA. The release of AITC from the fibers was temperature-dependent. At temperatures lower than 4 deg C the incorporated AITC remained within the fibers without losing activity; at room temperature, AITC released in a sustained manner over weeks. The release of AITC was also dependent on its initial concentration in the PLA electrospinning solution, samples with more AITC incorporated showed a higher release rate. PfA-g-films significantly inhibited the growth of Listeria innocua and E. coli k12 when tested on packaged foods.