STRUMIA MIRIAM CRISTINA
Artículos
Título:
Antimicrobial modification of polypropylene films by photograft and layered double hydroxides assembly
Autor/es:
MOSCONI, GIULIANA; SALGUERO, YADIRA; VALENTI, LAURA E.; ROJAS, RICARDO; STRUMIA, MIRIAM C.; GOMEZ, CESAR G.; GIACOMELLI, CARLA E.
Revista:
REACTIVE & FUNCTIONAL POLYMERS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2022 vol. 178 p. 105349 - 105349
ISSN:
1381-5148
Resumen:
roviding antimicrobial (AM) properties to polypropylene (PP) films is an appealing strategy for food packaging and biomedical areas. In this study, PP-based platforms with AM activity were obtained by the incorporation of layered double hydroxides (LDH) nanoparticles, intercalated with antimicrobial drugs (AMD), either nalidixate (Nal−) or benzoate (Bz−), to polyacrylate (PAA)-photografted PP films (PP-g-PAA/LDH-AMD). The assembly mechanism was explored, and the composition, morphological and interfacial properties of the obtained platforms were determined. Finally, the AM activity was assayed against Staphylococcus aureus and Escherichia coli strains. LDH-AMD were successfully incorporated to the platforms by electrostatic interactions with the carboxylate groups of the photografted PAA chains and they were mainly located in the outer region of the PAA layer. This incorporation was first produced at grooves and pits of this surface layer, and then spread by aggregation of