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

Ewelina Nowak¹, Justyna Żak¹, Magdalena Janik²

¹Department of Chemistry, University of Agriculture, ul. Balicka 122, 30-149 Kraków, Poland.

International Journal of Molecular Sciences

|October 29, 2025

Summary

Researchers developed novel double-layer films using furcellaran (FUR) and chitosan (CHIT)-furcellaran complexes. The CHIT-FUR membrane exhibits superior properties, showing potential for food packaging and pharmaceutical applications.

Keywords:

chitosan double-layer films furcellaran polysaccharides

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Area of Science:

Materials Science
Polymer Science
Biomaterials

Background:

Chitosan (CHIT) films are well-documented, but double-layer CHIT-FUR membranes with enhanced properties are less explored.
Developing advanced biomaterials is crucial for sustainable packaging and drug delivery systems.

Purpose of the Study:

To create and characterize novel double-layer films using furcellaran (FUR) and CHIT-FUR complexes.
To investigate the physicochemical, mechanical, thermal, structural, and morphological properties of these films.
To evaluate the potential of these films for food packaging and pharmaceutical applications.

Main Methods:

Fabrication of double-layer films using FUR and CHIT-FUR complexes.
Characterization using Fourier-Transform Infrared (FTIR) spectroscopy and Atomic Force Microscopy (AFM).
Assessment of physicochemical, mechanical, and thermal properties.

Main Results:

Successful production of distinct double-layer films confirmed by FTIR and AFM.
The 9:1 ratio (complex_9:1) demonstrated superior uniformity and performance.
Films exhibited promising physicochemical, mechanical, and thermal characteristics.

Conclusions:

The developed double-layer CHIT-FUR films offer unique properties not commonly found in single-layer counterparts.
The 9:1 complex shows significant potential as a high-performance biomaterial.
These films could serve as eco-friendly alternatives to conventional plastics in food packaging and as novel materials for medical capsules.