Cellulose/chitosan pH-responsive indicator incorporated with carrot anthocyanins for intelligent food packaging

Tirtashi F. E., Moradi M., Tajik H., Forough M., Ezati P., Kuswandi B.

International Journal of Biological Macromolecules, cilt.136, ss.920-926, 2019 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 136
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.ijbiomac.2019.06.148
  • Dergi Adı: International Journal of Biological Macromolecules
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.920-926
  • Anahtar Kelimeler: Smart packaging, Spoilage indicator, Anthocyanin, Sol-gel, Milk, ANTIMICROBIAL ACTIVITY, ANTIOXIDANT CAPACITY, RED CABBAGE, FILMS, CHITOSAN, NANOCOMPOSITE, TEMPERATURE, FRESHNESS, NISIN, MILK
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

© 2019 Elsevier B.V.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 °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 °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.