Effects of Three Modified Starches on The Physicochemical Properties of Chitosan-Based Packaging Film
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Abstract
Starch, as a biopolymer, due to its availability and low cost, could be a promising new packaging solution for biodegradable packaging. However, its weak functional properties require measures such as limiting interactions with certain hydroxyl groups and exploring mixtures with other polymers to enhance its effectiveness. In this study, films were prepared from various modified starches (E1412, E1414, and E1420) at different concentrations (2%, 4%, 6%, and 8% w/v), with a combination of 2% chitosan (CH) at different ratios (2:8, 3:7, 4:6, and 5:5 v/v). The impact of these chitosan ratios on important parameters, including water vapor transmission rate, tensile strength (TS), percentage elongation at break (EAB), elastic modulus (EM), and stiffness The transparency of the membrane has been thoroughly inspected. Through protonation, the amino groups of chitosan catalyze the formation of intermolecular bonds, thereby enhancing the tensile strength and water-repellent properties of the starch film. Notably, experimental findings highlighted that the coating containing 4% E1412-chitosan at a ratio of 5:5 (v/v) exhibited the strongest water vapor barrier. Therefore, these composite films have emerged as a promising avenue for developing environmentally friendly packaging solutions in the food industry.
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