Cashew-gum-based silver nanoparticles and palygorskite as green nanocomposites for antibacterial applications

Autor: Carla Eiras, Moisés das Virgens Santana, Lívio César Cunha Nunes, Carla Adriana Rodrigues de Sousa Brito, Cristiany Marinho Araújo, Humberto Medeiros Barreto, Antonio do Nascimento Cavalcante, Luiz Carlos Bertolino
Rok vydání: 2020
Předmět:
Staphylococcus aureus
Silver
Materials science
Energy-dispersive X-ray spectroscopy
Magnesium Compounds
Metal Nanoparticles
Bioengineering
Microbial Sensitivity Tests
02 engineering and technology
010402 general chemistry
01 natural sciences
Silver nanoparticle
Nanocomposites
Biomaterials
Microscopy
Electron
Transmission
X-Ray Diffraction
Specific surface area
Plant Gums
Spectroscopy
Fourier Transform Infrared
Escherichia coli
medicine
Anacardium
Fourier transform infrared spectroscopy
Antibacterial agent
Nanocomposite
Silicon Compounds
Spectrometry
X-Ray Emission
Palygorskite
Green Chemistry Technology
021001 nanoscience & nanotechnology
Anti-Bacterial Agents
0104 chemical sciences
Mechanics of Materials
Microscopy
Electron
Scanning
0210 nano-technology
Antibacterial activity
Nuclear chemistry
medicine.drug
Zdroj: Materials Science and Engineering: C. 115:110927
ISSN: 0928-4931
Popis: Nanocomposite materials have been proposed to enhance the properties of different materials. In this study, palygorskite (Pal) clay is proposed as a support matrix for silver nanoparticles stabilised with cashew gum (Anacardium occidentale L.) (AgNPs-CG), producing the Pal/AgNPs-CG nanocomposite, whose bactericidal activity was studied. AgNPs-CG was synthesised using a green method in which CG acted as a reducing and stabilising agent for these nanostructures. AgNPs-CGs were subsequently characterised then adsorbed to the Pal surface, which was previously treated to remove impurities such as quartz. Pal and Pal/AgNPs-CG were characterised by X-ray diffraction, specific surface area, thermal analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, and transmission electron microscopy. The antibacterial activity assay by the direct contact method showed that the synergistic effect of the combination of AgNPs-CG and Pal increased the bactericidal effect of the nanomaterial compared with the AgNPs-CG activity, reaching a percentage inhibition of up to 70.2% against E. coli and 85.3% against S. aureus. Nanocomposite atoxicity was demonstrated by the Artemia Salina model. Thus, the Pal/AgNPs-CG nanocomposite emerges as a nanomaterial with potential antibacterial applications.
Databáze: OpenAIRE
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