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Cellulose/chitosan pH-responsive indicator incorporated with carrot anthocyanins for intelligent food packaging
Date
2019-09-01
Author
Tirtashi, Fahimeh Ebrahimi
Moradi, Mehran
Tajik, Hossein
Forough, Mehrdad
Ezati, Parya
Kuswandi, Bambang
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
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In this study, the possible use of anthocyanins of black carrot (ABC) as a chemo-responsive dye to fabricate a colorimetric pH indicator in a cellulose-chitosan matrix was investigated in order to the monitoring of spoilage in pasteurized milk. Cellulose paper was impregnated with a chitosan solution prepared by a sol-gel method containing ABC (total anthocyanins content of 10 mg/100 mL) and characterized. The swelling and water solubility increased by incorporation of ABC into the chitosan-cellulose film. The colorimetric pH indicator showed an obvious color variation from pink to khaki at different pH values (pH 2-11). Stability tests revealed that the indicator had acceptable color stability during one-month storage at 20 degrees C. The results also confirmed the immobilization of ABC into the matrix of the polymeric indicator with no significant effect on the chemical and super-molecular structure of the samples. In food trial, fresh pasteurized milk was entirely discerned through a perceptible color change from blue to violet rose color after 48 h storage at 20 degrees C, which was comfortably observable by the naked eye. The results proved that the fabricated indicator could be used as food grade biomaterials to monitor freshness/spoilage of milk.
Subject Keywords
Smart packaging
,
Spoilage indicator
,
Anthocyanin
,
Sol-gel
,
Milk
URI
https://hdl.handle.net/11511/68349
Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
DOI
https://doi.org/10.1016/j.ijbiomac.2019.06.148
Collections
Department of Chemistry, Article