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Carboxymethyl cellulose – polyvinyl alcohol bioactive films with green extracted date seed polyphenols for active packaging of Shiitake mushrooms
Journal article   Open access   Peer reviewed

Carboxymethyl cellulose – polyvinyl alcohol bioactive films with green extracted date seed polyphenols for active packaging of Shiitake mushrooms

Kehinde Ganiyat Lawal, Raouf Aslam, Akmal Nazir, Balan Sundarakani, Costas Stathopoulos and Sajid Maqsood
Food bioscience, Vol.62, 105330
2024
DOI: https://doi.org/10.1016/j.fbio.2024.105330
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CC BY-NC V4.0,  Open Access

Abstract

Bioactive films Carboxymethyl cellulose Date seed Green solvent Polyphenol Polyvinyl alcohol
This study investigated the use of a natural deep eutectic solvent-based polyphenolic extract (DSE) from date fruit seed as a bioactive and functional component for the development of bioactive carboxyl methylcellulose-poly(vinyl)alcohol (CMCPVA) films. The impacts on the physicochemical, structural, water barrier and bioactive properties of the CMCPVA films were studied. Different concentrations of DSE (1.5%, 2%, 2.5%, and 3%) incorporated into CMCPVA film increased the total phenolic content (0.08 to 0.17 mgGAE/mL), DPPH scavenging activity (4.08 to 5.11 mmol GAE/mL), and ferric ion-reducing antioxidant power (0.82 to 1.46 μmol TE/mL) of the films. The antibacterial activities against S. aureus, L. monocytogenes, S. typhimurium, and E. coli were also improved. In particular, a 4-5 log reduction was recorded for CMCPVA film incorporated with 3% DSE. Also, the presence of DSE enhanced elongation at break (25.53% to 93.23%) and film thickness (0.10 to 0.19 mm), whereas tensile strength (6.39 to 1.40 MPa) and Young's modulus (25.89 to 2.85 MPa) decreased. Furthermore, UV-shielding performance improved, opacity decreased from 2.93 to 0.86, while the water vapor permeability was not significantly affected ranging from 3.01 to 5.83 (X 10-10 g/m.s.Pa). The application of CMCPVA film incorporated with 3% DSE (CMCPVA_3) as a bioactive film for preserving sliced and whole shiitake mushrooms at refrigeration temperature for 8 to 12 days was studied. The CMCPVA_3 film preserved the mushrooms' color, browning degree, and texture compared to the cling film-covered samples. There is potential for the successful application of NADES-based polyphenolic extract in biopolymer films for food preservation. [Display omitted]

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