Physical, Mechanical and Barrier Properties of Xanthosoma sagittifolium Starch-Based Edible Film Incorporated with Potassium Sorbate

Xanthosoma sagittifolium starch has the potential to be developed as a base for edible film, because it was hydrocolloid compound, as well as renewable natural resources, widely available and easy to obtain its. High amylose content of X. sagittifolium starch (35.34%), twice than cassava starch, so that it possible to produce strong and flexible edible film. The presence of the active ingredient in edible film with different it kinds and amounts would produce different properties too. The purpose of this study was to evaluate the physical, mechanical and barrier properties of active edible film due to variation of concentration of starch and potassium sorbate. Edible films have produced characteristics for tensile strength from 0.399 to 1.390 MPa, elongation from 14.943 to 31.647%, thickness from 0.065 to 0.081 mm, water vapor transmission rate from 10.095 to 15.247 g. mm/m(2). day, solubility from 27.126 to 59.846% and transparency from 0,719 to 1,063. To increase starch made elevation of edible film tensile strength, thickness, WVTR, and the smoothness, as well as decrease its water solubility, while increasing potassium sorbate would increase elongation and WVTR, as well as decrease the tensile strength.