Open Access

ARTICLE

Green Synthesis of Silver Nanoparticles Using Plectranthus Amboinicus Leaf Extract for Preparation of CMC/PVA Nanocomposite Film

by Nguyen Thi Thanh Thuy^1,*, Le Hoang Huy¹, Truong Thuy Vy¹, Nguyen Thi Thanh Tam², Bien Thi Lan Thanh¹, Nguyen Thi My Lan³

1 Nong Lam University Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
2 Industrial University of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
3 University of Science, Viet Nam National University Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam

* Corresponding Author: Nguyen Thi Thanh Thuy. Email:

(This article belongs to the Special Issue: Food Packaging Materials Based on Renewable Resources)

Journal of Renewable Materials 2021, 9(8), 1393-1411. https://doi.org/10.32604/jrm.2021.015772

Received 12 January 2021; Accepted 13 February 2021; Issue published 08 April 2021

Abstract

In the present study, the biogenic silver nanoparticles have been synthesized using aqueous leaf extract of Plectranthus amboinicus (PA), which acted as both reducing and stabilizing agents. The PA synthesized silver nanoparticles were blended with carboxymethyl cellulose/polyvinyl alcohol (CMC/PVA) biocomposite. The prepared AgNPs as well as the biogenic AgNPs incorporated CMC/PVA films were investigated using UV-visible spectrophotometry, Fourier-transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS), scanning electron microscope (SEM), and X–ray diffraction (XRD). The DLS results showed that biogenic AgNPs had the average particle size of 65.70 nm with polydispersity index of 0.44. The surface plasmon resonance of AgNPs, which was determined by UV-vis spectrophotometry, showed the value of 410.00 nm. These results therefore confirmed the reduction Ag⁺ into Ag° and the formation of AgNPs in the medium. The SEM imaging showed that AgNPs was quasi-spherical and monodisperse. The XRD peaks at 33.07°, 44.19°, 64.58° and 77.47° confirmed the crystalline nature and presence of AgNPs. The CMC/PVA films that incorporated with AgNPs displayed best mechanical strength and morphological properties than the pure CMC/PVA film. The film of CMC/PVA-AgNPs exhibited significant antibacterial activities against Bacillus spizizenii, Staphylococcus aureus, Salmonella typhi and Escherichia Coli.

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