AI Article Synopsis

  • * The research used a tape casting technique to produce larger PLA-oil films that required less solvent, and these films were analyzed for various properties, including their antimicrobial effectiveness, mechanical strength, and moisture barrier capabilities.
  • * Results showed that the 50 wt% essential oil blend significantly extended the shelf-life of waffles from 2 days to 30 days, with Vanilla effectively masking the odor of T. ammi and confirming the films' time-released oil properties through infrared spectroscopy.

Article Abstract

This study developed active packaging films of Polylactic acid incorporated with the plant-based essential oils of Trachyspermum ammi, T. ammi and Vanilla to package waffles, where the antimicrobial property was provided by T. ammi and its odor was masked by vanilla essential oil. Compared to conventional solvent-cast films of smaller sizes requiring a huge amount of solvents, bigger-size PLA-oil films with lower solvent demand were prepared by tape casting technique with 10, 30, and 50 wt% essential oil blends. Films were studied for their morphological, chemical, mechanical, barrier, and antimicrobial properties. The presence and time-bound release of volatile oils from the films was confirmed by infrared spectroscopy, with a continuous decrease of oils from the films till day 30. The plasticizing effect of oils in films was evidenced by decreased tensile strength and crystallinity. In contrast, an increase in elongation at break and water vapor permeability of oil films were also measured. Finally, when packed in PLA films containing 50 wt% blend of both oils, waffles shelf-life extended up to 30 days compared to 2 days for the neat PLA film, where Vanilla was found effective in masking the unpleasant odor of T.ammi as confirmed by sensory analysis.

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Source
http://dx.doi.org/10.1016/j.ijbiomac.2024.135086DOI Listing

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