Physico-Chemical and Antiadhesive Properties of Poly(Lactic Acid)/Grapevine Cane Extract Films against Food Pathogenic Microorganisms

• Published in: Polymers Vol. 12; no. 12; p. 2967
• Main Authors: Díaz-Galindo, Edaena Pamela, Nesic, Aleksandra, Cabrera-Barjas, Gustavo, Dublan-García, Octavio, Ventura-Aguilar, Rosa Isela, Vázquez-Armenta, Francisco Javier, Aguilar-Montes de Oca, Saúl, Mardones, Claudia, Ayala-Zavala, Jesús Fernando
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 12-12-2020; MDPI
• Subjects: Antiinfectives and antibacterials; Biodegradable materials; Biological activity; Biopolymers; Chemical properties; Elongation; Food; Food packaging; Fungicides; Listeria; Microorganisms; Molding machines; Pathogens; Permeability; Polylactic acid; polylactic acid (PLA) film; Polymers; Pressure molding; Pseudomonas aeruginosa; Scanning electron microscopy; stilbenes; surface microbial adhesion; Tensile strength; Thermal stability; Water vapor; Chile; United States > US; Germany; stilbenes; food packaging; surface microbial adhesion; polylactic acid (PLA) film
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym12122967

The aim of this study was evaluation of the physico-chemical properties and adhesion of microorganisms on poly(lactic acid) (PLA)-based films loaded with grapevine cane extract (5-15 wt%). The films were processed in a compression molding machine and characterized by mechanical, thermal, water vapor barrier and microbiological tests. The best physical-chemical properties for PLA film containing 10 wt% of extract were obtained. The addition of 10 wt% of extract into PLA films led to decrease of tensile strength for 52% and increase in elongation at break for 30%. The water vapor barrier of this film formulation was enhanced for 55%. All films showed thermal stability up to 300 °C. The low release of the active compounds from films negatively influenced their antimicrobial and antifungal activity.
growth inhibition onto PLA containing extracts (PLA-E) films was in the range between 15 and 35%. On the other side, PLA/extract films exhibited the antiadhesive properties against
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, which could imply their potential to be used as sustainable food packaging materials for preventing microbial contamination of food.