Characterization of pH sensitive sago starch films enriched with anthocyanin-rich torch ginger extract.
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/m2), toughness (2.54 MJ/m3), Young's modulus (73.96 MPa) and water vapour permeability (2.6 × 10-4 g·m/day·kPa·m2). 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.
['Xue Mei|Lam|L|', 'Mohammadi Nafchi|Abdorreza|A|', 'Ghasemipour|Farzaneh|F|', 'Mat Easa|Azhar|A|', 'Jafarzadeh|Shima|S|', 'Al-Hassan|A A|AA|']
D000872:Anthocyanins D003124:Colorimetry D006863:Hydrogen-Ion Concentration D056626:Inflorescence D008420:Manufactured Materials D008422:Materials Testing D008855:Microscopy, Electron, Scanning D010539:Permeability D010936:Plant Extracts D012995:Solubility D017550:Spectroscopy, Fourier Transform Infrared D013213:Starch D013718:Tensile Strength D014867:Water D030521:Zingiberaceae
Intelligent packaging Anthocyanin Biocomposite