4.6 Article

Development of Poly(L-Lactic Acid)/Chitosan/Basil Oil Active Packaging Films via a Melt-Extrusion Process Using Novel Chitosan/Basil Oil Blends

Journal

PROCESSES
Volume 9, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/pr9010088

Keywords

PLLA; chitosan; basil oil; active packaging; films; barrier properties; antioxidant properties

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This study aims to develop a fully biodegradable active packaging film by utilizing essential basil oil extract, improving the mechanical, antioxidant, and barrier properties of Poly(L-Lactic Acid)/Chitosan films. By modifying the chitosan with basil oil and incorporating it into the Poly(L-Lactic Acid) matrix, advanced food packaging properties were achieved, particularly with the PLLA/CS/BO5 and PLLA/CS/BO10 films showing the most promising potential for active packaging applications.
Following the global trend toward a cyclic economy, the development of a fully biodegradable active packaging film is the target of this work. An innovative process to improve the mechanical, antioxidant, and barrier properties of Poly(L-Lactic Acid)/Chitosan films is presented using essential basil oil extract. A Chitosan/Basil oil blend was prepared via a green evaporation/adsorption method as a precursor for the development of the Poly(L-Lactic Acid)/Chitosan/Basil Oil active packaging film. This Chitosan/Basil Oil blend was incorporated directly in the Poly(L-Lactic Acid) matrix with various concentrations. Modification of the chitosan with the Basil Oil improves the blending with the Poly(L-Lactic Acid) matrix via a melt-extrusion process. The obtained Poly(L-Lactic Acid)/Chitosan/Basil Oil composite films exhibited advanced food packaging properties compared to those of the Poly(L-Lactic Acid)/Chitosan films without Basil Oil addition. The films with 5%wt and 10%wt Chitosan/Basil Oil loadings exhibited better thermal, mechanical, and barrier behavior and significant antioxidant activity. Thus, PLLA/CS/BO5 and PLLA/CS/BO10 are the most promising films to potentially be used for active packaging applications.

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