info:eu-repo/semantics/article
Original antifouling strategy: Polypropylene films modified with chitosan-coated silver nanoparticles
Fecha
2019-08Registro en:
Mosconi, Giuliana; Stragliotto, María Fernanda; Slenk, Walte; Valenti, Laura Elisa; Giacomelli, Carla Eugenia; et al.; Original antifouling strategy: Polypropylene films modified with chitosan-coated silver nanoparticles; John Wiley & Sons Inc; Journal of Applied Polymer Science; 137; 10; 8-2019; 1-12
0021-8995
1097-4628
CONICET Digital
CONICET
Autor
Mosconi, Giuliana
Stragliotto, María Fernanda
Slenk, Walte
Valenti, Laura Elisa
Giacomelli, Carla Eugenia
Strumia, Miriam Cristina
Gomez, Cesar Gerardo
Resumen
A new coating strategy of polypropylene (PP) films with silver nanoparticles (AgNPs) is proposed to obtain surfaces with antifouling properties. As a first step, the photograft polymerization is used to produce polyacrylic acid-grafted PP (PAA-grafted PP) films. A green AgNP synthesis is used by thermal reduction of AgNO3 with amino groups of chitosan (CS), which controls ion diffusion and stabilizes nanoparticles. AgNP/CS complexes are adsorbed on PAA-grafted PP by electrostatic interactions, yielding AgNP/CS-coated PP films. These films show an excellent antimicrobial activity, even for AgNP contents as low as 0.08 wt %, reducing more than 4 log units in the viable Staphylococcus aureus concentration or inducing Escherichia coli death. This trend is consistent with an adequate amount of small AgNP adsorbed in an organized manner within a thin surface layer. Therefore, the antimicrobial activity of this film seems to be more than promising, used as an active surface for a wide range of applications.