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

Inyoung Choi; Bo Young Lee; Sangbin Kim; Seulgi Imm; Yoonjee Chang; Jaejoon Han

doi:10.1007/s10068-023-01254-9

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

Food Sci Biotechnol. 2023 Jan 28;32(8):1067-1077. doi: 10.1007/s10068-023-01254-9. eCollection 2023 Jul.

Authors

Inyoung Choi¹, Bo Young Lee¹, Sangbin Kim², Seulgi Imm², Yoonjee Chang², Jaejoon Han^{1

3}

Affiliations

¹ Seoul, 02841 Republic of Korea Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University.
² Seoul, 02707 Republic of Korea Department of Food and Nutrition, College of Science and Technology, Kookmin University.
³ Seoul, 02841 Republic of Korea Department of Food Biosciences and Technology, College of Life Sciences and Biotechnology, Korea University.

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.

Supplementary information: The online version contains supplementary material available at 10.1007/s10068-023-01254-9.

Keywords: Chitosan; Composite/bilayer system; Edible coating; Gelatin; Grapefruit seed extract.

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