Development, Characterisation of Novel Edible and Biodegradable Composite Films Produced from Casting of Mango (Mangifera indica) Puree, Gelatin and Defatted Soy Protein

Mango puree was produced out of Banaganappalli mango variety, a local species of mango grown in India. This puree was blended with starch, glycerol along with gelatin and defatted soy protein for casting the composite edible films. Utilization of excess mango available in high season, defatted soy protein from the waste of soy industry could help to reduce waste and additionally commercial grade starch, glycerol and gelatin was used to produce a value added product. Mango puree in 100 ml aqueous solution. Optical, mechanical, barrier, water resistance, thermal and morphology properties of all mango puree edible films were investigated. The composite yellowish films exhibited tensile strength, elongation at break, water vapour permeability, water solubility, melting temperature, crystallinity and were in the range of 4.26 Mpa to 5.89 MPa, 18.08% to 25.09%, 5.69 g.mm.kPa-1h-1m-2 to 8.56 g.mm.kPa-1h-1m-2, 35.30% to 51.57%, 154.35oC to 175.69 oC, 21.98% to 25.22% respectively. With these properties along with lower moisture content made the films useful for wide range of food packaging applications such as edible films having mango flavor.