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<p>Sustainable packaging films based on chitosan, sodium alginate, carboxymethylcellulose, starch, and guar gum are widely being researched for their potential to replace fossil-based polymers. However, these films lack antimicrobial and antioxidant properties, limiting their application in food preservation. In this study, biowaste-derived apricot kernel essential oil (AKEO) is incorporated in Sodium alginate-guar gum (GS) based films to improve the functional properties. The GS film with 1 mL AKEO (GSA4) exhibited a tremendous improvement in antimicrobial properties, targeting both gram-positive and gram-negative bacteria with clearance zone diameters of 25&#xa0;mm and 16&#xa0;mm, respectively. The film also possessed significant antioxidant properties, indicated by a 130% increment in the radical scavenging activity. The characterization studies, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) show that the AKEO changed the GS film’s surface microstructure and chemical structure. The X-ray diffractogram (XRD) analysis indicates that the GSA films are mostly amorphous with very low crystallinity. The water-repellant nature of the GSA4 film improved as indicated by a 42.12% decrease in moisture content and a 48% decrease in water vapor transmission rate (WVTR). The flexibility of GSA4 film increased by 121.17% while the tensile strength was slightly reduced. Also, the film can be an efficient UV barrier, as apparent from 90% absorbance at 320&#xa0;nm. Moreover, the GSA4 film degraded completely in a very short span of 35 days and demonstrated an improved shelf life. Thus, GSA4 film is a promising alternative for active food packaging applications.</p>

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Development and characterization of biowaste-derived apricot kernel essential oil incorporated sodium alginate/guar gum-based antimicrobial active packaging

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Prajisha P. Ananthan,
  • Senthil Vadivu Kulandhaivelu,
  • Kanchana Manivasakan

摘要

Sustainable packaging films based on chitosan, sodium alginate, carboxymethylcellulose, starch, and guar gum are widely being researched for their potential to replace fossil-based polymers. However, these films lack antimicrobial and antioxidant properties, limiting their application in food preservation. In this study, biowaste-derived apricot kernel essential oil (AKEO) is incorporated in Sodium alginate-guar gum (GS) based films to improve the functional properties. The GS film with 1 mL AKEO (GSA4) exhibited a tremendous improvement in antimicrobial properties, targeting both gram-positive and gram-negative bacteria with clearance zone diameters of 25 mm and 16 mm, respectively. The film also possessed significant antioxidant properties, indicated by a 130% increment in the radical scavenging activity. The characterization studies, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) show that the AKEO changed the GS film’s surface microstructure and chemical structure. The X-ray diffractogram (XRD) analysis indicates that the GSA films are mostly amorphous with very low crystallinity. The water-repellant nature of the GSA4 film improved as indicated by a 42.12% decrease in moisture content and a 48% decrease in water vapor transmission rate (WVTR). The flexibility of GSA4 film increased by 121.17% while the tensile strength was slightly reduced. Also, the film can be an efficient UV barrier, as apparent from 90% absorbance at 320 nm. Moreover, the GSA4 film degraded completely in a very short span of 35 days and demonstrated an improved shelf life. Thus, GSA4 film is a promising alternative for active food packaging applications.