Antimicrobial PLA/TPS/gelatin sheets with enzymatically crosslinked surface containing silver nanoparticles |
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| Authors: | Ana Paula De Oliveira Pizzoli Nicolli Grecco Marchiore Silvio José De Souza Priscila Dayane de Freitas Santos Odinei Hess Gonçalves Fabio Yamashita Livia Bracht Marianne Ayumi Shirai Fernanda Vitória Leimann |
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| Affiliation: | 1. Programa De Pós-Gradua??o Em Tecnologia De Alimentos, Universidade Tecnológica Federal Do Paraná, Campus Campo Mour?o (UTFPR-CM), Campo Mour?o, Paraná, Brazil;2. Departamento Acadêmico De Alimentos, Universidade Tecnológica Federal Do Paraná, Campus Campo Mour?o (UTFPR‐CM), Campo Mour?o, Paraná, Brazil;3. Departamento De Ciência E Tecnologia De Alimentos, Centro De Ciências Agrárias, Universidade Estadual De Londrina (UEL), Londrina, Paraná, Brazil |
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| Abstract: | In the present work, poly (lactic acid)/thermoplastic starch/gelatin sheets were produced by calendering–extrusion process and silver nanoparticles (AgNPs, synthesized by chemical reduction with d ‐glucose), were incorporated at sheet surfaces to promote antimicrobial activity. A gelatin solution containing AgNPs was enzymatically crosslinked as a layer at sheets surface using transglutaminase. AgNPs presented 63 nm (z average size) and spherical shape (scanning electron microscopy, SEM) while morphology analysis showed that sheets presented internal porosity. Mechanical properties (Young modulus, elongation at break, and tensile strength) and water vapor permeability presented significant difference in function of gelatin amount added to sheets formulation due to increased internal porosity. Antimicrobial activity was demonstrated against Bacillus cereus, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa for the AGNPs solution as well as for the surface treated films. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43039. |
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| Keywords: | biodegradable blends crosslinking packaging properties and characterization |
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