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Previous issue date: 2009-01-23 / They are in this study the experimental results of the analysis of thermal performance of composite material made from a plant matrix of polyurethane derived from castor oil of kernel of mamona (COF) and loading of clay-mineral called vermiculite expanded. Bodies of evidence in the proportions in weight of 10%, 15% and 20% were made to determine the thermal properties: conductivity (k), diffusivity (ά) and heat capacity (C), for purposes of comparison, the measurements were also performed the properties of polyurethane of castor without charge and also the oil polyurethane (PU), both already used in thermal insulation. Plates of 0.25 meters of material analyzed were manufactured for use as insulation material in a chamber performance thermal coverage. Thermocouples were distributed on the surface of the cover, and inside the material inside the test chamber and this in turn was subjected to artificial heating, consisting of a bank of incandescent lamps of 3000 w. The results obtained with the composite materials were compared with data from similar tests conducted with the camera alone with: (a) of oil PU, (b) of COF (c) glass wool, (d ) of rock wool. The heat
resistance tests were performed with these composites, obtaining temperature limits for use in the range of 100 ? C to 130 ? C. Based on the analysis of the results of performance and thermal properties, it was possible to conclude that the COF composites with load of
expanded vermiculite present behavior very close to those exhibited by commercial insulation material / Apresentam-se nesta pesquisa os resultados experimentais obtidos da an?lise de desempenho t?rmico do material comp?sito confeccionado a partir de uma matriz vegetal de poliuretano derivado do ?leo de mamona e carga do argilo-mineral denominado vermiculita expandida. Corpos de provas nas propor??es em massa de 10%, 15% e 20% foram fabricados para determina??o das propriedades t?rmicas: condutividade (k), difusividade (ά) e capacidade calor?fica (C), para efeito de compara??o, tamb?m foram realizadas as medi??es de propriedades do poliuretano de mamona sem carga e tamb?m do poliuretano de petr?leo (PU), Ambos j? empregados em isolamento t?rmico. Placas de 0,25 m? dos materiais analisados foram fabricadas para uso como material de isola??o em uma c?mara de desempenho t?rmico de cobertura. Termopares foram distribu?dos na superf?cie da cobertura, no interior dos materiais e no interior da c?mara de teste e esta, por sua vez, foi submetida a aquecimento artificial, constitu?do por um banco de l?mpadas incandescentes de 3000 w. Os resultados obtidos com os materiais comp?sitos foram comparados com dados obtidos em ensaios id?nticos realizados com a c?mara isolada com: (a) poliuretano de petr?leo (PU); (b) poliuretano de ?leo de mamona; (c) l? de vidro; (d) l? de rocha. Testes de resist?ncia ao calor foram realizados com esses comp?sitos, obtendo temperaturas limites de uso na faixa de 100?C a 130 ?C. Com base na an?lise dos resultados de desempenho e propriedades t?rmicas, foi poss?vel concluir que os comp?sitos de poliuretano de mamona com carga de vermiculita expandida apresentam comportamentos muito pr?ximos daqueles exibidos pelos materiais de isola??o comerciais
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15558 |
| Date | 23 January 2009 |
| Creators | Silva, Jacques Cousteau da |
| Contributors | CPF:35846852491, http://lattes.cnpq.br/0490476694313938, Souza J?nior, Caubi Ferreira, CPF:40378632434, http://lattes.cnpq.br/5346630547885521, Hildebrand J?nior, Le?nidas, CPF:09890962896, http://lattes.cnpq.br/9093463713286889, Marinho, George Santos |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia Mec?nica, UFRN, BR, Tecnologia de Materiais; Projetos Mec?nicos; Termoci?ncias |
| 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:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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