RT info:eu-repo/semantics/article
T1 Designing bilayered composite films by direct agar/chitosan and citric acid-crosslinked PVA/agar layer-by-layer casting for packaging applications
A1 Diop, Cherif Ibrahima Khalil
A1 Beltrán Calvo, Sagrario
A1 Sanz Díez, Mª Teresa
A1 García Tojal, Javier
A1 Trigo López, Miriam
K1 Double-layered films
K1 Composite packaging
K1 Agar/chitosan
K1 Crosslinked PVA/Agar
K1 Layer-by-layer casting
K1 Ingeniería química
K1 Chemical engineering
K1 Biotecnología
K1 Biotechnology
K1 Alimentos
K1 Food
AB Packaging is a crucial tool for reducing food waste and enhancing product competitiveness. Fossil fuel-based plastics, mostly used for food packaging, account for nearly 40% of global plastic waste. To address this issue, this study developed a layer-by-layer casting technique to create novel bilayered plastic composites with distinct agar/chitosan and PVA/agar layers. Film's properties, such as thickness, plasticity, and tensile strength, were affected by adjusting the volume of the layers. The elongation at break was positively related to the presence of citric acid (up to 30 wt%) as a crosslinker. The chitosan-rich first layer provided better UV-light blocking potential and opacity, which were beneficial in the prevention of lipid oxidation. Increasing the second layer by 40–60% substantially reduced the light absorption, while the colors were proportional to the citric acid content. The FT-IR band at 1713 cm−1 indicated an increase in C=O ester groups with crosslinker content. The hydrophobicity of the films was enhanced by the chitosan-rich layer. XRD supported intramolecular and intermolecular hydrogen bonding, whereas the micrographs revealed tightly bound structure between layers. The results corroborated that the inclusion of agar in the formulations increased the stability of the film, making it ideal for various packaging applications.
PB Elsevier
SN 0268-005X
YR 2023
FD 2023-11
LK http://hdl.handle.net/10259/9268
UL http://hdl.handle.net/10259/9268
LA eng
NO This work was supported by the European Commission, Horizon 2020 program through the Marie-Curie Individual Fellowship (H2020-MSCA-IF-2019), with regards to the ALGWAS-BIOR project (Grant agreement number 898804). This work was also supported by European Union H2020-LC-SC3-2020-NZE-RES-CC, NMBP-16-2020-GA 953152 and DT-NMBP-04-2020 Projects and Ministerio deand Ministerio de Ciencia, Innovación y Universidades CTQ(QMC) RED 2018-102471-T MultiMetDrugs Network (Spain).
DS Repositorio Institucional de la Universidad de Burgos
RD 04-dic-2024