Double-Layer Films Based on Furcellaran/Chitosan Complex—Structural and Functional Characteristics of Packaging Materials

This study involved the creation and characterisation of double-layer films based on furcellaran (FUR) and chitosan (CHIT)-furcellaran complexes. Although chitosan films are quite widely described, a double CHIT-FUR membrane with high solubility and water vapour permeability is seldom reported in the literature. In this work, the physicochemical, mechanical and thermal properties of the obtained double-layer films were examined. The structural properties and morphology of the prepared films were presented using FTIR and AFM analysis. The obtained results confirmed the production of double-layer films, the layers of which differed from each other. The characterisation of the obtained films indicated that the 9:1 ratio (complex_9:1) is superior in terms of uniformity and performance. The obtained double-layer films have the potential to replace traditional plastics in food packaging and may also serve as a new material for medicine capsules in the pharmaceutical industry.