Ratna Dewi Kusumaningtyas, - (2018) PREPARATION AND CHARACTERIZATION OF EDIBLE FILM FROM SORGHUM STARCH WITH GLYCEROL AND SORBITOL AS PLASTICIZERS. Journal of Engineering Science and Technology, 13. ISSN ISSN : 1823-4690

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Abstract

Preparation of edible film from sorghum starch as biodegradable food packaging has been studied in this research. Starch-based film commonly has drawbacks since it is brittle and absorbs moisture easily. Hence, an innovation was developed to produce sorghum starch edible film with low moisture absorption and solubility in water by the addition of various plasticizers (glycerol, sorbitol, and the mixture of glycerol and sorbitol). Formulations of sorghum edible films with these types of plasticizers have never been explored previously. In this work, plasticizer concentrations were varied (20%, 40%, and 60% w/w). The effects of types and concentrations of plasticizer on thickness, moisture absorption/water uptake, solubility in water, tensile strength, elongation, and young modulus were investigated. Among all types of plasticizer, the best treatment on synthesis of sorghum-based edible film was the addition of 20% glycerol, which provided the thickness of 0.1231 mm, tensile strength of 1.4793 MPa, and elasticity of3.6983 N/mm2 . Application of 60% glycerol demonstrated the best water uptake of 60% and elongation of 65%. An addition of 20% sorbitol has the lowest solubility in water (26%). This work contributes on the improvement of the sorghum starch-based edible film properties as alternative potential food packaging by the addition of plasticizers (glycerol, sorbitol, and the mixture of glycerol-sorbitol).

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