Avaliação de uma resina polimérica contendo nanopartículas de prata

• Autor(a) principal: Mandú, Maria Aparecida Larrubia Granado Moreira Rodrigues
• Data de Publicação: 2013
• 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/1/15761
• topic: Nanoparticles; bactericidal; silver; Nanopartícula; bactericida; prata.; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA

In this work, the bactericidal action of silver nanocomposite, prepared from the modification of the commercial resin Lewatit® VPOC1800 (containing thiol group), was tested in three species of bacteria (Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli). The cellular structure and composition of those bacteria are different, influencing their reaction to the biocides, thus being an important factor of study. The evaluation of the biocidal activity was made through experiments that esteemed the area of inhibition in proportion to the activity of the resin on the target bacteria to be studied. The resin showed bactericidal activity on all the bacteria studied. Seemingly, the morphologic differences did not affect the bactericidal activity. A test series was performed with the intention of verifying the mass of the resin and the ideal time of contact with the solution to achieve descontamination. Values of 0,2g for 1min were observed. The different bacterial concentrations used in the study did not influence in the bactericidal activity of the resin. A study in column was accomplished to discover the point of saturation of the composite. We observed that the curve of rupture of the resin follows an exponential growth tendency, being the same for all the species studies, reaching the saturation in approximately 2250 mL