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Bilayer Polylactic Acid and Chitosan/Gelatin Film Containing Epigallocatechin Gallate Prepared through Solvent Casting and Electrospinning: Properties, Bioactivities and Release Kinetics

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Abstract

This paper presents the development of biodegradable and environmentally friendly packaging films. Active packaging bilayer films were prepared by combining chitosan-fish gelatin (CS-FG) with epigallocatechin-3-gallate (EGCG) at varying concentrations on the top layer of polylactic acid (PLA) film via solvent casting (SC-films) or electrospinning (ES-films) technique. Incorporation of EGCG (0.5–2%) in films significantly increased tensile strength, film thickness, water vapor barrier properties, seal strength and antioxidant activities (P < 0.05), whereas swelling ability and light transmittance decreased (P < 0.05). Fourier Transform Infrared (FTIR) spectra confirmed the intermolecular interaction among CS, FG and EGCG. The shift of some peaks was also recorded with the addition of EGCG. Films with higher levels of EGCG (2%) had greater antioxidant activities in both SC-films and ES-films (P < 0.05). Based on thermal analysis, both the bilayer films had lower thermal stability than the PLA film. Scanning electron microstructure revealed the smooth and compact structure of SC-films. On the other hand, ES-films had a network of compact fibers having a diameter of 160–190 nm. Both SC-films and ES-films showed the controlled release of EGCG following the Fickian diffusion-controlled release mechanism, but the latter exhibited a slower release rate. Thus, both films could serve as active packaging with antioxidant activity.

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Acknowledgements

The authors were grateful for the financial support, provided by the Prince of Songkla University (PSU), Hat Yai under the NSTDA Chair grant (P-20-52297), Prachayacharn grant (Grant no. AGR6502111N) and Fundamental fund grant (AGR650155M).

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Authors and Affiliations

  1. International Center of Excellence in Seafood Science and Innovation, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand

    Arunachalasivamani Ponnusamy, Bharathipriya Rajasekaran, Mohamed Tagrida & Soottawat Benjakul

  2. Center of Excellence in Bio-based Materials and Packaging Innovation, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand

    Thummanoon Prodpran

  3. Department of Food and Nutrition, Kyung Hee University, Seoul, 02447, Republic of Korea

    Jun Tae Kim & Soottawat Benjakul

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Arunachalasivamani Ponnusamy: Data curation; Investigation; Methodology; Writing original draft. Bharathipriya Rajasekaran: Data curation; Investigation; Writing-review & editing. Mohamed Tagrida: Methodology; Data curation. Thummanoon Prodpran and Jun Tae Kim: Data curation; Writing-review & editing. Soottawat Benjakul: Conceptualization; Funding acquisition; Resources; Supervision; Writing-review & editing.

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Ponnusamy, A., Rajasekaran, B., Tagrida, M. et al. Bilayer Polylactic Acid and Chitosan/Gelatin Film Containing Epigallocatechin Gallate Prepared through Solvent Casting and Electrospinning: Properties, Bioactivities and Release Kinetics. J Polym Environ 32, 260–276 (2024). https://doi.org/10.1007/s10924-023-02998-5

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