A Comprehensive Approach to the SiO2/Ag Nanoparticles' Interaction on Polyvinyl Chloride Films and the Effects of Antimicrobial Activity

Autor(es)

Brito, Sabrina da Costa ; Malafatti, Joao Otavio Donizette ; Brasil, Edneide Morais ; Bresolin, Joana Dias ; Sivieri, Katia ; Paris, Elaine Cristina ; Ferreira, Marcos David

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Physics; v. 53, n. 4, p. 9-pg., 2023-08-01.

Resumo

Active packaging aims to best respond against adversity by inserting nanoparticles with barrier and antimicrobial properties. Silver nanoparticles act against a broad spectrum of microorganisms, one of the most applied metallic nanoparticles in antimicrobial packaging. This work reports the antimicrobial activity of silver nanoparticles and their application in polyvinyl chloride (PVC) films. The methodology consists of obtaining PVC films with SiO2/Ag immobilized by the casting method and available antimicrobial concentrations against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) bacteria. The effect of nanoparticle ratio on the film was verified employing 12.5, 25, and 100 mu g mL(-1) of SiO2/Ag, according to the JIS Z 2801:2000 test. The morphological characterization observed the SiO2/Ag particles were detected internally and superficially in all the films. Additionally, the SiO2/Ag increased concentration promotes the particles were found more preferentially on the surface. As a result, the higher value of 100 mu g mL(-1) SiO2/Ag decreased to 97.9% colony-forming units (CFU) for S. aureus. This result was superior to E. coli, showing only a 10% growth reduction attributed to the distinct composition of the membrane microbial. Thus, the present study could verify that an activity antimicrobial in PVC films is influenced by SiO2/Ag concentration and the ability to allow the microorganism contact. (AU)

• Processo FAPESP: 21/14992-1 - Obtenção de membranas nanocompósitas de PCL/PMMA/zeólita para aplicação como sensor químico para detecção de resíduos de polifenóis da indústria cafeeira
• Beneficiário: João Otávio Donizette Malafatti
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado