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Advisor(s)
Abstract(s)
This study focuses on the extraction of phenolic compounds from the fermentation
of Phanerochaete chrysosporium and Gloeophyllum trabeum. The main goal was to
synthesize phenol/chitosan microspheres and PVA films and characterized using FTIR,
TGA, DSC, SEM, and mechanical tests to evaluate their physical, chemical, and mechanical
properties for antimicrobial packaging applications. Homogeneous chitosan microspheres
loaded with lignin-derived phenols were obtained, showing controlled release of antimicrobial
compounds. The incorporation of phenolic microspheres into PVA/chitosan films
resulted in significant improvements in mechanical properties: the films exhibited an elastic
modulus of 36.14 ± 3.73 MPa, tensile strength of 12.01 ± 1.14 MPa, and elongation at break
of 65.19 ± 5.96%. Thermal tests revealed that chitosan-containing films had enhanced
thermal stability, with decomposition temperatures (T10) reaching 116.77 ◦C, compared to
89.28 ◦C for pure PVA. In terms of antimicrobial activity, PVA/chitosan/phenol films effectively
reduced Lactobacillus growth and milk acidity, maintaining quality for up to 96 h at
room temperature, outperforming controls with acetic acid and H2O2. The films also inhibit
yeast growth for one week. In conclusion, phenols can be effective antimicrobial agents in
dairy, but their use should be monitored. Additionally, PVA/chitosan-phenol films offer
biodegradability, antimicrobial properties, and sustainability for diverse applications.
Description
Keywords
Lignocellulosic Chitosan Films Innovative packaging
Citation
Lopretti Correa, Mary Isabel; Batista-Menezes, Diego; Rezende, Stephany Cunha de; Santamaria-Echart, Arantzazu; Barreiro, Maria-Filomena; Vega-Baudrit, Jose Roberto (2024). Biorefinery of Lignocellulosic and Marine Resources for Obtaining Active PVA/Chitosan/Phenol Films for Application in Intelligent Food Packaging. Polymers. ISSN 2073-4360. 17:1, p. 1-19
Publisher
MDPI