4.7 Article

Characterization of pH sensitive sago starch films enriched with anthocyanin-rich torch ginger extract

Journal

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 164, Issue -, Pages 4603-4612

Publisher

ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.09.082

Keywords

Intelligent packaging; Anthocyanin; Biocomposite

Funding

  1. Higher Education Ministry of Malaysia, Fundamental Research Grant Scheme [203/PTEKIND/6711812]
  2. Universiti Sains Malaysia [304/PTEKIND/6315423]

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The development of intelligent packaging based on natural and biodegradable resources is getting more attention by researchers in recent years. The aim of this study was to develop and characterize a pH-sensitive films based on sago starch and incorporated with anthocyanin from torch ginger. The pH-sensitive films were fabricated by casting method with incorporation of different torch ginger extract (TGE) concentration. The surface morphology, physicochemical, barrier, and mechanical properties as well as the pH-sensitivity of films were investigated. The film with the highest concentration of TGE showed the lowest tensile strength (4.26 N/m(2)), toughness (2.54 MJ/m(3)), Young's modulus (73.96 MPa) and water vapour permeability (2.6 x 10(-4) g.m/day.kPa.m(2)). However, its elongation at break (85.14%), moisture content (0.27%) and water solubility (37.92%) were the highest compared to other films. pH sensitivity analysis showed that the films containing TGE extract, changes in colour by changing the pH. The colour of films changed from pink to slightly green as the pH increased from pH 4 to 9. Thus, the developed pH-sensitive film with torch ginger extract has potential as intelligent packaging for detection of food freshness or spoilage to ensure their quality and safe consumption. (C) 2020 Elsevier B.V. All rights reserved.

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