Zinc oxide nanoparticles and periodate oxidation in developing pH-sensitive packaging film based on modified gelatin. (June 2021)

• Record Type: Journal Article
• Authors: Mousazadeh, Saeed; Ehsani, Ali; Moghaddas Kia, Ehsan; Ghasempour, Zahra
• Is Part Of: Food packaging and shelf life. Volume 28(2021)
• Publication Date: 2021-06
• Subjects: Cross-linked gelatin -- Zinc oxide nanoparticle -- pH-responsive film -- Red cabbage extract; Food -- Packaging -- Periodicals; Food -- Preservation -- Periodicals; Food -- Packaging; Periodicals; 664.0905
• DOI: 10.1016/j.fpsl.2021.100654
• Languages: English
• ISSNs: 2214-2894

Abstract

Graphical abstract: Highlights: Oxidized sucrose and ZnONPs were applied to enhance gelatin based film characteristics. Utilization of OS as cross-linker in films resulted in solubility and WVP decrease. Using red cabbage extract led to color changes from purple to blue green in pH 3−12. The obtained film showed antioxidant and antimicrobial activity. Simultaneous usage of ZnONPs and OS resulted in maximum strength of packaging film. Abstract: Response surface methodology was used to develop pH-sensitive gelatin-based films containing red cabbage extract and zinc oxide nanoparticles (ZnONPs). We also evaluated oxidized sucrose (OS), prepared via the periodate oxidation of sucrose, as a cross-linker to compensate for gelatin solubility. Solubility decreased in films containing higher OS levels. The minimum WVP of the cross-linked gelatin films was obtained at 12.8 % OS and high levels of ZnONPs. Antioxidant activity was reinforced by both ZnONPs and OS. Higher OS concentrations caused decreased opacity, while ZnONPs had the opposite effect. The optimum treatment included 0.043 % ZnONPs and 11.45 % OS. Together, ZnONPs and OS resulted in enhanced strength and decreased flexibility. Greater antimicrobial activity was witnessed against Staphylococcus aureus than Escherichia coli . The optimum film's color changed from reddish-purple to blue-green between pH 3−12. In summary, we reinforced the gelatin film structure and achieved functional characteristics in a novel, intelligent, and active packaging material.