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Previous issue date: 2013-08-23 / The mechanisms of initiation, transport and deposition of sediment in turbidity currents have been studied because of its potential environmental impact and for containing the main hydrocarbon reservoirs. Several research groups have performed simulations of these phenomena in reduced models, using the coal 205 as sediment. However, this material has limitations on its use in noninvasive imaging techniques for monitoring of turbidity currents in tanks of hydraulic simulation. Thus, this study aimed the preparation of polymer nanocomposites with the potential to replace the coal 205 in these simulations. Polymer nanocomposites based on thermosetting matrices containing inorganic filler (clay, graphite and carbon black) were prepared.By means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM) micrographs it was possible to verify that the fillers incorporated into polymer matrices showed nanometric dimensions and were dispersed homogeneously, except the carbon black that presented some points of agglomeration. The forms of particles are also evaluated by SEM , classified as semi-angular and semi-rounded. The electrical properties were investigated using electrical impedance spectroscopy. The materials studied presented values of settling velocities and density near the coal 205. Thus, all nanocomposites prepared exhibited the desired characteristics to replace the coal 205 in tank hydraulics simulation. / Os mecanismos de inicia??o, transporte e deposi??o de sedimentos em correntes de turbidez v?m sendo estudados devido ao seu potencial impacto ambiental. Al?m disso, os mecanismos de forma??o cont?m os principais reservat?rios de hidrocarbonetos. Grupos de pesquisas t?m realizado simula??es desses fen?menos, em modelos reduzidos, utilizando o carv?o 205 como sedimento. Por?m, esse material apresenta limita??es quanto ao seu uso em t?cnicas de imageamento n?o invasivo para acompanhamento das correntes de turbidez em tanques de simula??o hidr?ulica. Assim, essa pesquisa teve como objetivo preparar material polim?rico com o potencial de substituir o carv?o 205 nessas simula??es. Foram preparados nanocomp?sitos baseados em matrizes termorfixas contendo carga inorg?nica (argila, grafite e negro de fumo). Por meio de micrografias de microscopia eletr?nica de varredura (MEV) e microscopia eletr?nica de transmiss?o (MET) foi poss?vel verificar que as cargas incorporadas ?s matrizes polim?ricas apresentavam dimens?es nanom?tricas e estavam dispersas homogeneamente, exceto o negro de fumo que apresentou alguns pontos de aglomera??o. Tamb?m por MEV foram avaliadas as formas das part?culas, as quais foram classificadas como semi-angulares e semi-arredondadas. As propriedades el?tricas foram investigadas por meio de espectroscopia por imped?ncia el?trica. Os materiais avaliados apresentaram velocidades de queda e massa espec?fica pr?ximas as do carv?o 205. Assim, todos os nanocomp?sitos preparados apresentaram caracter?sticas desejadas para substituir o carv?o 205 em tanques de simula??o hidr?ulica.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/3243 |
| Date | 23 August 2013 |
| Creators | Gon?alves, Raiane Valenti |
| Contributors | Basso, Nara Regina de Souza |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais, PUCRS, BR, Faculdade de Engenharia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -7432719344215120122, 500, 600, -655770572761439785 |
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