1. Incorporação de nanopartículas de prata em Zamac 5 anodizado.
- Author
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Riedi da Silva, Ben-hur, Raquel Kunst, Sandra, Góes Soares, Luana, Lovato, Tamires, José Schneider, Guilherme, Rech Volz, Débora, Luiza Ziulkoski, Ana, Deise Fleck, Juliane, and Trindade Oliveira, Cláudia
- Subjects
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NONFERROUS alloys , *SILVER nanoparticles , *GUAVA , *SCANNING electron microscopes , *OXALIC acid , *PLANT extracts - Abstract
Zamak is a non-ferrous alloy, with considerable resistance to mechanical efforts. The alloy is widely used to produce objects in common use, such as door handles, faucets and handrails. These objects are potential transmission mechanisms for viruses and bacteria in places with high traffic of people. In this sense, several studies show that silver nanoparticles (AgNPs) have an antimicrobial spectrum. The objective of this work was to incorporate silver nanoparticles in Zamak 5 samples, anodized and sealed. Thus, the Zamak 5 samples were anodized in 0.3 M oxalic acid, and subsequently sealed in a plant extract based on Psidium guajava L. + 0.1 mM silver nitrate (AgNO3). Morphological analyzes and chemical mapping using Scanning Electron Microscope (SEM) were performed to evaluate the incorporation mechanisms. In addition, bacterial growth assays were performed with Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. The results show that there was incorporation of silver (Ag) in the form of particles and agglomerates of particles, homogeneously arranged on the surface of the samples. However, it is concluded that the incorporation of silver element particles (Ag) in anodized Zamak 5, with the increase in the time of sealing the samples in plant extract, showed a reduction (30% on average) of the biofilm formed by Pseudomonas aeruginosa in the analysis of antimicrobial behavior. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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