EFFECTS OF KAPPA CARRAGEENAN AND GLYCEROL IN PURPLE SWEET POTATO STARCH BASED EDIBLE FILM
DOI:
https://doi.org/10.11113/jt.v78.4507Keywords:
Purple sweet potato, edible film, carrageenan, solubility, mechanical propertiesAbstract
The solubility and mechanical properties of purple sweet potato (PSP) starch-based edible films are being investigated. The formulation was prepared using a constant amount of PSP starch (4 % w/v) with five different ratios of carrageenan and glycerol (1:1, 1.5:0.5, 0.5:1.5, 0.5:0.5, 1:0) which act as gelling agents and plasticizers respectively. PSP starch generates 61.79 mg/100 g anthocyanin and retains 16.78 % antioxidant capacity. Carrageenan and glycerol (0.5:1.5) ratio shows the highest solubility in water (53.50 ± 0.1085 %) and highest tensile strength (9.1674 ± 0.5399 MPa) with the lowest elongation at break (20.436 ± 2.826 %).
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