Physicomechanical properties, release kinetics, and antimicrobial activity of activated low-density polyethylene and ori
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ORIGINAL PAPER
Physicomechanical properties, release kinetics, and antimicrobial activity of activated low‑density polyethylene and orientated polypropylene films by Thyme essential oil active component Dinasadat Mousavian1 · Abdorreza Mohammadi Nafchi2 · Leila Nouri1 · Ahmadreza Abedinia1 Received: 16 August 2020 / Accepted: 6 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this research active packaging based on orientated polypropylene (OPP) or low-density polyethylene (LDPE) and thymol were prepared and characterized. OPP and LDPE films were immersed in thymol for 1, 2, and 3 days. The mechanical, color, and microbial properties were examined. Film antibacterial properties were evaluated against Staphylococcus aureus ATCC 6538 bacteria as the Gram-positive model and Escherichia coli O157:H7 and Salmonella enterica ssp. enterica serovar enteritidis ATCC 13076 bacteria as the Gram-negative models. When immersion time was lengthened, the tensile strength diminished in both films, while elongation at break increased. On the other hand, as the immersion time was curtailed, the transparency (L * factor) also decreased while redness (a * factor) and yellowness (b * factor) significantly increased (p
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