Effect of Glycerol Concentration on Physical Properties of Composite Edible Films Prepared from Plums Gum and Carboxy Methyl Cellulose

In this study a novel edible film plasticized with glycerol was prepared from plums gum and carboxy methyl cellulose. The mechanical, gas permeability and thermal properties of blends films Incorporated with four levels of glycerol (5%, 10%, 15%, and 20% w/w) as plasticizer were determined. The aim of this study was to better understand the possibility of preparing composite edible film on the basis of plums gum, carboxy methyl cellulose (CPG) and glycerol and influence of glycerol contents on the behavior of the physical properties of composite films. Water vapor permeability of the films was found to decrease as the glycerol content increased from 5% to 20% w/w in the formulation, resulted in improvement of films flexibility and significantly lower tensile strength and higher elongation at break. The results of the present study demonstrated the benefit of using plums gum as a natural gum to prepare edible films.