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Preparation of Active Nanocomposite Film Consisting of Sodium Caseinate, Zno Nanoparticles and Rosemary Essential Oil for Food Packaging Applications Publisher



Alizadehsani M1 ; Moghaddas Kia E2 ; Ghasempour Z3 ; Ehsani A3
Authors
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Authors Affiliations
  1. 1. Division of Food Safety and Hygiene, School of Public Health, Tehran University of Medical Science, Tehran, Iran
  2. 2. Department of Food Science and Technology, Maragheh University of Medical Sciences, Maragheh, Iran
  3. 3. Department of Food Science and Technology, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran

Source: Journal of Polymers and the Environment Published:2021


Abstract

Active films based on sodium caseinate (SC) were fabricated via the casting method; these films were reinforced with zinc oxide nanoparticles (ZnO NPs) and rosemary essential oil (REO). The films’ optical, mechanical, and barrier and antimicrobial properties were evaluated. Further characterization was done using SEM, XRD, and FTIR spectroscopy. The results disclosed that the incorporation of ZnO NPs and REO into the SC matrix significantly improved the mechanical and barrier properties as well as moisture resistance of the SC film. The simultaneous incorporation of ZnO NPs and REO considerably reduced the water vapor permeability (WVP) of the films but increased their flexibility and strength. The microscopic and spectroscopic characterization revealed that the additives were highly compatible with the SC film matrix given the formation of uniform and homogeneous composite films. The nanocomposite films also exhibited noteworthy antimicrobial activity against the tested bacteria. In summary, this type of biopolymer-based active film can be considered as a promising material for food packaging applications. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.
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