The effect of glycerol concentration as a plasticizer on edible films made from alginate towards its physical characteristic

This study aims to determine the effects of the addition of the best glycerol concentration as a plasticizer on edible film alginate for tensile strength test, thickness test, percent elongation, and transparency test. The research method used was experimental with a Completely Randomized Design consisting of five treatments and three replications. The treatment of the addition of glycerol concentration was 0.3% based on the volume of solution, 0.5% based on the volume of solution, 0.7% based on the volume of solution, 0.9% based on the volume of the solution, and 1.1% based on the volume of the solution. Observations on the physical characteristics of edible films include thickness, tensile strength, percent elongation, and transparency. The results of the study of physical characteristics of thickness, tensile strength, percent elongation, and transparency concluded that the addition of glycerol concentration in edible films as much as 0,9% was the best treatment based on Japanesse Industrial Standard (JIS) with an average value of 0,094 mm thickness, tensile strength 8,25 MPa, elongation percent value 10,83%, and transparency value is 1,86.