Carboxymethyl cellulose/starch-based films incorporating chitosan nanoparticles for multifunctional food packaging

In this work, we described novel composite films derived from CMC (carboxymethyl cellulose) and ST (starch) polymers reinforced CS NPs (chitosan nanoparticles) achieved by the solution casting method. The CS NPs were prepared using an ionic gelation method utilizing chitosan with sodium alginate, and employed as a reinforcing phase for the development of CMC/ST-CS NPs (CSC) bio-nanocomposite films with different content of the CS NPs loading levels (0, 1, 3, 6 and 9 wt%) described. The prepared film interactions and compatibility between the polymers were established using FT-IR, X-ray diffraction, and SEM. The tensile strength (similar to 81.08%), UV blocking (similar to 34.50%), moisture content (similar to 54.12%), and permeability [oxygen (similar to 45.93%) and water vapor permeability (similar to 68.62%)] properties of the prepared films were determined. The overall migration limit of the prepared CSC films showed below the permitted limit of 1000 mu g/dm(2). The prepared films showed antioxidant (similar to 42.35%) and very good cell viability properties (more than 90%). Further, prepared CSC films displayed the potential to extend the shelf-life of the chicken meat up to 56 h, when stored at room temperature. These experimental results suggested that, prepared CSC film is well suitable for the potential active packaging purpose.