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Comparison of chitosan and gelatin-based films and application to antimicrobial coatings enriched with grapefruit seed extract for cherry tomato preservation

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Abstract

Bio-based single, composite, and bilayer edible films were developed based on chitosan and gelatin, including grapefruit seed extract (GSE) as an antimicrobial agent. The physicochemical and antimicrobial properties of films were analyzed, and it was found that compounding and laminating two polymers could enhance their physicochemical properties. The composite film was strong, endurable, and flexible compared with the single ones. In addition, the composite and bilayer films had lower water vapor permeability than the single ones. Edible films and coatings with GSE presented a greater bactericidal effect than the inactive ones. In addition, the hardness, weight, and color changes of the coated cherry tomatoes during 7-day storage did not differ, whereas a bacterial reduction against Salmonella Typhimurium was revealed. Taken together, composite and bilayer films with CH and GL and enriched with GSE were developed for food packaging applications, and it showed improved mechanical, water barrier, and antimicrobial properties.

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Abbreviations

CH:

Chitosan

CL:

Gelatin

GSE:

Grapefruit seed extract

FFS:

Film-forming solution

FT-IR:

Fourier transform-infrared

GRAS:

Generally recognized as safe

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Acknowledgements

This study was carried out with the support of the R&D Program for Forest Science Technology (Project No. “2021375A00-2123-BD02”) provided by the Korea Forest Service (Korea Forestry Promotion Institute).

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Authors and Affiliations

  1. Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea

    Inyoung Choi, Bo Young Lee & Jaejoon Han

  2. Department of Food and Nutrition, College of Science and Technology, Kookmin University, Seoul, 02707, Republic of Korea

    Sangbin Kim, Seulgi Imm & Yoonjee Chang

  3. Department of Food Biosciences and Technology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea

    Jaejoon Han

Authors
  1. Inyoung Choi
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  2. Bo Young Lee
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  3. Sangbin Kim
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  4. Seulgi Imm
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  5. Yoonjee Chang
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  6. Jaejoon Han
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Contributions

IC: Methodology, Formal analysis, Writing, Visualization. BYL: Conceptualization, Methodology, Investigation, Writing. SK: Methodology, Formal analysis, Writing. SI: Methodology, Formal analysis, Writing. YC: Formal analysis, Visualization, Writing. JH: Conceptualization, Methodology, Resources.

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Correspondence to Yoonjee Chang or Jaejoon Han.

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Choi, I., Lee, B.Y., Kim, S. et al. Comparison of chitosan and gelatin-based films and application to antimicrobial coatings enriched with grapefruit seed extract for cherry tomato preservation. Food Sci Biotechnol 32, 1067–1077 (2023). https://doi.org/10.1007/s10068-023-01254-9

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