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Carbohydrate-Based Films Containing Ph-Sensitive Red Barberry Anthocyanins: Application As Biodegradable Smart Food Packaging Materials Publisher Pubmed



Sani MA1, 2 ; Tavassoli M1, 3 ; Hamishehkar H4 ; Mcclements DJ5
Authors
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Authors Affiliations
  1. 1. Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
  2. 2. Division of Food Safety and Hygiene, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Food Science and Technology, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
  4. 4. Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
  5. 5. Department of Food Science, University of Massachusetts Amherst, Amherst, 01003, MA, United States

Source: Carbohydrate Polymers Published:2021


Abstract

A novel pH-sensitive colorimetric film was prepared based on immobilizing red barberry anthocyanins (RBAs) within composite chitin nanofiber (CNF) and methylcellulose (MC) matrices. The incorporation of CNFs and RBAs improved their mechanical properties, moisture resistance, and UV–vis screening properties. Moreover, the RBAs could be used as colorimetric indicators to detect food spoilage because they are sensitive to changes in pH and ammonia gas production. The RBA-halochromic indicator changed from reddish/crimson → pink → yellow with increasing pH, and from pink → yellow with increasing ammonia vapor concentration. Furthermore, the smart films possessed good antioxidant and antimicrobial activity owing to the presence of the RBAs and CNFs. Finally, the validity of the indicator to monitor the freshness/spoilage of a model food (fish) was demonstrated. Overall, this study shows that active/smart films can be assembled from food grade ingredients that can protect and monitor the freshness of products, like meat and fish. © 2020 Elsevier Ltd
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