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Characterisation and colour response of smart sago starch-based packaging films incorporated with Brassica oleracea anthocyanin


Che Hamzah, Nurul Husna and Khairuddin, Nozieana and Muhamad, Ida Idayu and Hassan, Mohd Ali and Ngaini, Zainab and Sarbini, Shahrul Razid (2022) Characterisation and colour response of smart sago starch-based packaging films incorporated with Brassica oleracea anthocyanin. Membranes, 12 (10). art. no. 913. pp. 1-15. ISSN 2077-0375


To meet the need for food products to be safe and fresh, smart food packaging that can monitor and give information about the quality of packaged food has been developed. In this study, pH-sensitive films with sago starch and various anthocyanin concentrations of Brassica oleracea also known as red cabbage anthocyanin (RCA) at 8, 10, 12, and 14% (w/v) were manufactured using the solvent casting process. Investigation of the physicochemical, mechanical, thermal, and morphological characteristics of the films was performed and analysed. The response of these materials against pH changes was evaluated with buffers of different pH. When the films were exposed to a series of pH buffers (pH 3, 5, 9, 11, and 13), the RCA-associated films displayed a spectacular colour response. In addition, the ability of the starch matrix to overcome the leaching and release of anthocyanins was investigated. Higher concentrations of RCA can maintain the colour difference of films after being immersed in a series of buffer solutions ranging from acidic to basic conditions. Other than that, incorporating RCA extracts into the starch formulation increased the thickness whereas the water content, swelling degree, tensile strength, and elongation at break decreased as compared to films without RCA. The immobilisation of anthocyanin into the film was confirmed by the FTIR measurements. The surface patterns of films were heterogeneous and irregular due to the presence of RCA extract aggregates, which increased as the extract concentration enhanced. However, this would not affect the properties of films. An increase in thermal stability was noted for the anthocyanin-containing films at the final stage of degradation in TGA analysis. It is concluded that RCA and sago starch formulation has great potential to be explored for food packaging purposes.

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Official URL or Download Paper: https://www.mdpi.com/2077-0375/12/10/913

Additional Metadata

Item Type: Article
Divisions: Faculty of Biotechnology and Biomolecular Sciences
Faculty of Agricultural Science and Forestry
Faculty of Humanities, Management and Science
DOI Number: https://doi.org/10.3390/membranes12100913
Publisher: MDPI
Keywords: Smart food packaging; pH-responsive; Colour indicator; Brassica oleracea; Sago starch; Biopolymer film
Depositing User: Ms. Nur Faseha Mohd Kadim
Date Deposited: 15 Sep 2023 08:17
Last Modified: 15 Sep 2023 08:17
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/membranes12100913
URI: http://psasir.upm.edu.my/id/eprint/100660
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