Análise da ação bactericida de selante de matriz polimérica com aditivo de prata

• Autor(a) principal: Rocha, Ully Guimarães
• Data de Publicação: 2022
• Outros Autores: [e-mail]
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/19368
• topic: Mechanical engineering; Surfaces (Technology); Polymers; Bactericides; Silver; Engenharia mecânica; Superfícies (Tecnologia); Polímeros; Bactericidas; Prata; ENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOS

The aim of this project was to analise and characterize some properties of polymeric surfaces based on PLA, uncoated and coated with a polymer matrix sealant with Silver Nitrate aditives. The methodology included the fabrication of PLA plates by additive manufacturing (3D printing) and the creation of a sealant model to cover these samples silver-based. Techniques like visual inspections, optical microscopy (OM), digital image processing (DIP), scanning electron microscopy (SEM), semi-quantitative chemical analysis by energy dispersive spectroscopy (EDS) and average roughness (Ra) were used to characterize the surfaces. In vitro tests were carried out to analyze the effect of the surfaces and quantify the growth of the bacteria Escherichia coli ATCC 11229 and Staphylococcus aureus ATCC 25923. The results obtained showed a a reduction in the number of bacteria of approximately 64x for the silver-based material after 30 minutes of contact with the sealant surface, when compared to the non-coated surfaces.