Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-28T19:32:55Z No. of bitstreams: 1 MiguelCabralDeMacedoNeto_TESE.pdf: 9317764 bytes, checksum: d6388f1f4587c23e99a96ddc982ae840 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-29T19:48:43Z (GMT) No. of bitstreams: 1 MiguelCabralDeMacedoNeto_TESE.pdf: 9317764 bytes, checksum: d6388f1f4587c23e99a96ddc982ae840 (MD5) / Made available in DSpace on 2017-03-29T19:48:43Z (GMT). No. of bitstreams: 1 MiguelCabralDeMacedoNeto_TESE.pdf: 9317764 bytes, checksum: d6388f1f4587c23e99a96ddc982ae840 (MD5) Previous issue date: 2016-10-10 / O surgimento de materiais comp?sitos tem o objetivo de se encontrar propriedades especificas desejadas para determinadas aplica??es, como melhor resist?ncia mec?nica, materiais mais leves, economicamente vi?vel, materiais recicl?veis e etc.Nessa perspectiva estudou-se a viabilidade do uso da palha de a?o para a obten??o de um comp?sito de matriz polim?rica. Foram testadas tr?s formula??es, com 10%, 15% e 20% de fibras do comp?sito. Para a caracteriza??o do comp?sito foram determinadas propriedades t?rmicas (condutividade, capacidade t?rmica, difusividade e resistividade), mec?nicas (tra??o e flex?o) e fisioqu?micas (MEV, DRX, densidade, absor??o e degrada??o). O comp?sito, em suas tr?s formula??es, apresentou resist?ncia mec?nica superior a quase totalidade dos comp?sitos j? estudados no laborat?rio LMHES. Essa maior capacidade de resist?ncia mec?nica esteve associada a utiliza??o de um fibra met?lica. No que diz respeito as propriedades t?rmicas, o comp?sito estudado apresentou uma menor capacidade de isolamento t?rmico que os outros comp?sitos anteriormente estudados. O comp?sito apresentou maior viabilidade para a absor??o de umidade e resist?ncia mec?nica. o pior resultado deu-se para aplica??es t?rmica onde sua condutividade t?rmica est? acima da maioria dos comp?sitos polim?rico mostrados pela literatura, em fun??o da utiliza??o de uma fibra met?lica. Foram realizados ensaios mec?nicos, t?rmicos dentre outros, apresentando ?timos resultados devido as propriedades espec?ficas do comp?sito proposto como resist?ncia a flex?o, e boa resist?ncia ? absor??o de meios aquosos. As propriedades do comp?sito pode ser utilizado para a fabrica??o de estruturas que n?o requeiram significativa resist?ncia mec?nica na tra??o, como por exemplo, prot?tipos solares e e?licos, como fornos e fog?es solares e p?s de aerogeradores. / Composite materials arise from the need of finding desired properties for certain applications, such as better mechanical resistance, lighter materials, cost-effectiveness, recyclable material, etc. The difficulties of disposal, recycling or reuse are now environmental concerns and therefore subject matter of much research. In this perspective we studied the feasibility of using steel wool for obtaining a polymeric matrix composite. Three formulations were tested, 10%, 15% and 20% of composite fibers. For the characterization of the composite were determined thermal properties (conductivity, heat capacity, diffusivity and resistivity), mechanical properties (traction and bending) and physiochemical properties (SEM, XRD, density, absorption and degradation). The composite in its three formulations had higher mechanical strength compared to almost all composites that have already been studied in the laboratory LMHES. This greater mechanical resilience was associated with the use of a metallic fiber. Regarding the thermal properties, the composite studied had a lower thermal insulation than other composites studied previously. The composite showed higher viability for humidity absorption and mechanical resilience. The worst result was in thermal applications where its thermal conductivity is above of most polymeric composites found in the literature, due to the use of a metallic fiber. Some tests were made, such as mechanical, thermal, among other tests, showing excellent results because of the specific properties of the composites proposed, namely flexural strength, and good resistance to absorption in aqueous environment. The properties of such composite can be used to make structures that do not require significant mechanical resilience in traction, for instance in solar and wind prototypes, such as ovens and solar powered cookers and wind generator blades.