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<p>Lately, Chitosan-based films (C-films) incorporating essential oils (EOs) have gained researchers' attention due to their biodegradability and excellent bioactivities. Nevertheless, the EOs' high cost is considered a constraint. Therefore, we aimed to develop C-films enriched with different concentrations of <i>Cinnamomum zeylanicum</i> EO (0.5% to 8%) and evaluate their global performance. The incorporation of the EO was verified by Fourier transform infrared spectroscopy analysis. As regards the physicochemical and mechanical analysis, experimental data revealed a considerable augmentation in the C-film opacity (from 1.50 to 6.10), thickness (from 15 to 195&#xa0;μm), and tensile strength (TS) (from 5.12 to 21.74&#xa0;MPa) following the enrichment with EO. However, the treated C-films showed a decrease in moisture content (MC) (from 40.06 to 10.91%), swelling level (SL) (from 763.20 to 5.12%), hydrosolubility (HS) (from 63.26 to 51.28%), hydrophobicity (from <i>θ</i><sub><i>W</i></sub> = 98.06° to <i>θ</i><sub><i>W</i></sub> = 20.53°), elongation at break (EB) (from 159.12 to 16.97%), and water vapor transmission rate (WVTR) (from 71.05 to 10.50&#xa0;g/h.m<sup>2</sup>). The variation in these parameters was proportional to the EO concentration. Concerning the biological activities, the C-film incorporating EO at 8% inhibited over 80% of the tested radicals, while the antioxidant activity of the control C-film was negligible. Furthermore, the C-film enriched with EO at 8% exhibited great antibacterial activity against <i>Enterococcus hirae</i>, <i>Escherichia coli</i>, <i>Pseudomonas aeruginosa</i>, and <i>Staphylococcus aureus</i>, and inhibited their biofilm development by more than 95%. Ultimately, molecular docking revealed a high affinity between EO major constituents and bacterial proteins involved in biofilm establishment (&lt; -4.9&#xa0;kcal/mol). These encouraging findings indicate that the elaborated C-films present remarkable potential for application in the food sector as an alternative to fossil-based packaging and synthetic agents.</p>

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Optimization of Chitosan-Based Film Performance by the Incorporation of Cinnamomum Zeylanicum Essential Oil

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Anouar Mouhoub,
  • Amine Guendouz,
  • Zainab El Alaoui-Talibi,
  • Saad Ibnsouda Koraichi,
  • Cherkaoui El Modafar

摘要

Lately, Chitosan-based films (C-films) incorporating essential oils (EOs) have gained researchers' attention due to their biodegradability and excellent bioactivities. Nevertheless, the EOs' high cost is considered a constraint. Therefore, we aimed to develop C-films enriched with different concentrations of Cinnamomum zeylanicum EO (0.5% to 8%) and evaluate their global performance. The incorporation of the EO was verified by Fourier transform infrared spectroscopy analysis. As regards the physicochemical and mechanical analysis, experimental data revealed a considerable augmentation in the C-film opacity (from 1.50 to 6.10), thickness (from 15 to 195 μm), and tensile strength (TS) (from 5.12 to 21.74 MPa) following the enrichment with EO. However, the treated C-films showed a decrease in moisture content (MC) (from 40.06 to 10.91%), swelling level (SL) (from 763.20 to 5.12%), hydrosolubility (HS) (from 63.26 to 51.28%), hydrophobicity (from θW = 98.06° to θW = 20.53°), elongation at break (EB) (from 159.12 to 16.97%), and water vapor transmission rate (WVTR) (from 71.05 to 10.50 g/h.m2). The variation in these parameters was proportional to the EO concentration. Concerning the biological activities, the C-film incorporating EO at 8% inhibited over 80% of the tested radicals, while the antioxidant activity of the control C-film was negligible. Furthermore, the C-film enriched with EO at 8% exhibited great antibacterial activity against Enterococcus hirae, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus, and inhibited their biofilm development by more than 95%. Ultimately, molecular docking revealed a high affinity between EO major constituents and bacterial proteins involved in biofilm establishment (< -4.9 kcal/mol). These encouraging findings indicate that the elaborated C-films present remarkable potential for application in the food sector as an alternative to fossil-based packaging and synthetic agents.