Production of nanocomposite films functionalized with silver nanoparticles bioreduced with rosemary (Rosmarinus officinalis L.) essential oil

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Sganzerla, William Gustavo ; Castro, Luiz Eduardo Nochi ; da Rosa, Cleonice Goncalves ; Almeida, Aline da Rosa ; Maciel-Silva, Francisco Weshley ; Kempe, Paula Regina Gelinski ; de Oliveira, Alexandre Leite Rodrigues ; Forster-Carneiro, Tania ; Bertoldi, Fabiano Cleber ; Barreto, Pedro Luiz Manique ; Veeck, Ana Paula de Lima ; Nunes, Michael Ramos

• Document type: Journal article
• Source: JOURNAL OF AGRICULTURE AND FOOD RESEARCH; v. 11, p. 10-pg., 2022-12-18.

Abstract

This study produced nanocomposite films with silver nanoparticles (AgNPs) bioreduced with rosemary (Ros-marinus officinalis L.) essential oil. The nanocomposites were produced by the casting technique with gelatin/ carboxymethyl cellulose/citric pectin and functionalized with 15, 30, and 50% (v/v) AgNPs. The results demonstrate that the rosemary essential oil presented various bioactive compounds, and the major compounds were alpha-pinene, bornyl acetate, and 1,8-cineol. The AgNPs showed a particle size lower than 50 nm, zeta potential of-30 mV, and polydispersity index of 0.35. UV-vis spectroscopy, TEM, SEM, and XRD confirmed the synthesis of AgNPs with spherical shapes, diameters of 50 nm, and crystalline structures. The nanocomposite films con-taining AgNPs demonstrated strong antimicrobial activity against eight pathogenic microorganisms. The incor-poration of AgNPs affected the opacity and improved the mechanical properties of the nanocomposites. In conclusion, the eco-friendly nanocomposite produced can be a sustainable material for biological applications. (AU)

• FAPESP's process: 19/26925-7 - Development of an automated system for biofuel precursor production using sub-critical technology
• Grantee: William Gustavo Sganzerla
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)