Compósitos à base de resina epóxi reforçados com fibra de coco

Detalhes bibliográficos
Autor(a) principal: Gonçalves, Jorge Antônio Vieira
Data de Publicação: 2010
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFS
Texto Completo: https://ri.ufs.br/handle/riufs/3485
Resumo: Polymer composites reinforced with fibers are of great interest in the automotive industry, with emphasis to epoxy resin reinforced with glass fibers However, these fibers exhibit abrasive behavior causing wear of equipment, making it susceptible to the loss of properties due to the breakdown of fibers during processing, high cost of manufacturing. In turn, the interest of companies and researchers for composite alternatives, using renewable resources, having a low cost and being biodegradable, has increased. The use of vegetable fibers in thermosetting in commercial applications has been promising, considering that they are not toxic, have low cost, are renewable sources and meet the demands of environmental preservation. In addition, the vegetable fibers are not abrasive to processing equipment and create composites with low susceptibility to loss of properties during processing. Among the wide variety of existing plant fibers, coir (coconut product), abundant in the state of Sergipe, with an average diameter of 0.25 mm and lower density than the glass fibers, it was studied as a strengthening component in the epoxy matrix (DGEBA), at the levels of 0, 10, 20 and 30% by weight, continuous and randomly oriented. These composites were tested in tension and bending and their surface examined by scanning electron microscopy (SEM). Among the properties evaluated, the increase in the level of reinforcement caused a significant increase in the tensile strength and bending modulus of the composites compared to pure resin. The microstructural observations revealed the failure mechanisms that can occur during fracture, and that the area of natural coconut fiber contributes to good adhesion with DGEBA (diglycidyl ether of bisphenol A).
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spelling Gonçalves, Jorge Antônio Vieirahttp://lattes.cnpq.br/3264248290660253Macêdo, Marcelo Andradehttp://lattes.cnpq.br/16353388948902212017-09-26T12:01:50Z2017-09-26T12:01:50Z2010-02-25GONÇALVES, Jorge Antônio Vieira. Compósitos à base de resina epóxi reforçados com fibra de coco. 2010. 60 f. Dissertação (Mestrado em Engenharia de Materiais) - Universidade Federal de Sergipe, São Cristóvão, 2010.https://ri.ufs.br/handle/riufs/3485Polymer composites reinforced with fibers are of great interest in the automotive industry, with emphasis to epoxy resin reinforced with glass fibers However, these fibers exhibit abrasive behavior causing wear of equipment, making it susceptible to the loss of properties due to the breakdown of fibers during processing, high cost of manufacturing. In turn, the interest of companies and researchers for composite alternatives, using renewable resources, having a low cost and being biodegradable, has increased. The use of vegetable fibers in thermosetting in commercial applications has been promising, considering that they are not toxic, have low cost, are renewable sources and meet the demands of environmental preservation. In addition, the vegetable fibers are not abrasive to processing equipment and create composites with low susceptibility to loss of properties during processing. Among the wide variety of existing plant fibers, coir (coconut product), abundant in the state of Sergipe, with an average diameter of 0.25 mm and lower density than the glass fibers, it was studied as a strengthening component in the epoxy matrix (DGEBA), at the levels of 0, 10, 20 and 30% by weight, continuous and randomly oriented. These composites were tested in tension and bending and their surface examined by scanning electron microscopy (SEM). Among the properties evaluated, the increase in the level of reinforcement caused a significant increase in the tensile strength and bending modulus of the composites compared to pure resin. The microstructural observations revealed the failure mechanisms that can occur during fracture, and that the area of natural coconut fiber contributes to good adhesion with DGEBA (diglycidyl ether of bisphenol A).Compósitos poliméricos reforçados com fibras sintéticas são de grande interesse na indústria automobilística, merecendo destaque as resinas epoxídicas reforçadas por fibras de vidro. No entanto, estas fibras apresentam comportamento abrasivo causando desgastes dos equipamentos, tornando-se susceptíveis à perda de propriedades, devido à quebra das fibras durante o processamento, alto custo de fabricação. Por sua vez, o interesse de empresas e pesquisadores por compósitos alternativos, que utilizem recursos renováveis, apresentem baixo custo e sejam biodegradáveis, tem aumentado. A utilização de fibras vegetais em termorrígidos nas aplicações comerciais tem sido promissora, tendo em vista que elas não são tóxicas, possuem baixo custo, são de fontes renováveis e atendem as novas exigências de preservação ambiental. Além disso, as fibras vegetais não são abrasivas a equipamentos de processo e geram compósitos com baixa susceptibilidade a perda de propriedades durante o processamento. Entre a grande variedade de fibras vegetais existentes, a fibra de coco (subproduto do coco), abundante no Estado de Sergipe, com diâmetro médio de 0,25 milímetros e densidade inferior a das fibras de vidro, foi estudada como componente de reforço na matriz epóxi (DGEBA),nos teores de 0, 10, 20 e 30% em peso, contínua e orientada aleatoriamente. Estes compósitos foram ensaiados em tração e flexão e sua superfície analisada por microscopia eletrônica de varredura (MEV). Dentre as propriedades avaliadas, o aumento no teor de reforço provocou um acréscimo significativo da resistência à tração e flexão e do módulo de elasticidade dos compósitos comparados com a resina pura. As observações microestruturais revelaram os mecanismos de falhas que podem ocorrer durante a fratura; e que a superfície singular da fibra de coco contribui para uma boa adesão com a DGEBA (diglicidil éter do bisfenol A).application/pdfporUniversidade Federal de SergipePós-Graduação em Ciência e Engenharia de MateriaisUFSBRResina epóxiFibra de cocoPolímerosCompósitosEpoxy resinCoconut fiberPolymersCompositesCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICACompósitos à base de resina epóxi reforçados com fibra de cocoCOMPOSITES BASED ON EPOXY RESIN REINFORCED WITH COCONUT FIBERinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSTEXTJORGE_ANTONIO_VIEIRA_GONCALVES.pdf.txtJORGE_ANTONIO_VIEIRA_GONCALVES.pdf.txtExtracted texttext/plain75077https://ri.ufs.br/jspui/bitstream/riufs/3485/2/JORGE_ANTONIO_VIEIRA_GONCALVES.pdf.txt4e656ed10475b77806d2c68e456017d4MD52THUMBNAILJORGE_ANTONIO_VIEIRA_GONCALVES.pdf.jpgJORGE_ANTONIO_VIEIRA_GONCALVES.pdf.jpgGenerated Thumbnailimage/jpeg1309https://ri.ufs.br/jspui/bitstream/riufs/3485/3/JORGE_ANTONIO_VIEIRA_GONCALVES.pdf.jpg7a911db8159ad5bb492b99655f155390MD53ORIGINALJORGE_ANTONIO_VIEIRA_GONCALVES.pdfapplication/pdf4800968https://ri.ufs.br/jspui/bitstream/riufs/3485/1/JORGE_ANTONIO_VIEIRA_GONCALVES.pdfb83965e5437b02ad32b93d4c01ceea79MD51riufs/34852017-11-27 21:24:55.352oai:ufs.br:riufs/3485Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2017-11-28T00:24:55Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false
dc.title.por.fl_str_mv Compósitos à base de resina epóxi reforçados com fibra de coco
dc.title.alternative.eng.fl_str_mv COMPOSITES BASED ON EPOXY RESIN REINFORCED WITH COCONUT FIBER
title Compósitos à base de resina epóxi reforçados com fibra de coco
spellingShingle Compósitos à base de resina epóxi reforçados com fibra de coco
Gonçalves, Jorge Antônio Vieira
Resina epóxi
Fibra de coco
Polímeros
Compósitos
Epoxy resin
Coconut fiber
Polymers
Composites
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
title_short Compósitos à base de resina epóxi reforçados com fibra de coco
title_full Compósitos à base de resina epóxi reforçados com fibra de coco
title_fullStr Compósitos à base de resina epóxi reforçados com fibra de coco
title_full_unstemmed Compósitos à base de resina epóxi reforçados com fibra de coco
title_sort Compósitos à base de resina epóxi reforçados com fibra de coco
author Gonçalves, Jorge Antônio Vieira
author_facet Gonçalves, Jorge Antônio Vieira
author_role author
dc.contributor.author.fl_str_mv Gonçalves, Jorge Antônio Vieira
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/3264248290660253
dc.contributor.advisor1.fl_str_mv Macêdo, Marcelo Andrade
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/1635338894890221
contributor_str_mv Macêdo, Marcelo Andrade
dc.subject.por.fl_str_mv Resina epóxi
Fibra de coco
Polímeros
Compósitos
topic Resina epóxi
Fibra de coco
Polímeros
Compósitos
Epoxy resin
Coconut fiber
Polymers
Composites
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
dc.subject.eng.fl_str_mv Epoxy resin
Coconut fiber
Polymers
Composites
dc.subject.cnpq.fl_str_mv CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
description Polymer composites reinforced with fibers are of great interest in the automotive industry, with emphasis to epoxy resin reinforced with glass fibers However, these fibers exhibit abrasive behavior causing wear of equipment, making it susceptible to the loss of properties due to the breakdown of fibers during processing, high cost of manufacturing. In turn, the interest of companies and researchers for composite alternatives, using renewable resources, having a low cost and being biodegradable, has increased. The use of vegetable fibers in thermosetting in commercial applications has been promising, considering that they are not toxic, have low cost, are renewable sources and meet the demands of environmental preservation. In addition, the vegetable fibers are not abrasive to processing equipment and create composites with low susceptibility to loss of properties during processing. Among the wide variety of existing plant fibers, coir (coconut product), abundant in the state of Sergipe, with an average diameter of 0.25 mm and lower density than the glass fibers, it was studied as a strengthening component in the epoxy matrix (DGEBA), at the levels of 0, 10, 20 and 30% by weight, continuous and randomly oriented. These composites were tested in tension and bending and their surface examined by scanning electron microscopy (SEM). Among the properties evaluated, the increase in the level of reinforcement caused a significant increase in the tensile strength and bending modulus of the composites compared to pure resin. The microstructural observations revealed the failure mechanisms that can occur during fracture, and that the area of natural coconut fiber contributes to good adhesion with DGEBA (diglycidyl ether of bisphenol A).
publishDate 2010
dc.date.issued.fl_str_mv 2010-02-25
dc.date.accessioned.fl_str_mv 2017-09-26T12:01:50Z
dc.date.available.fl_str_mv 2017-09-26T12:01:50Z
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dc.identifier.citation.fl_str_mv GONÇALVES, Jorge Antônio Vieira. Compósitos à base de resina epóxi reforçados com fibra de coco. 2010. 60 f. Dissertação (Mestrado em Engenharia de Materiais) - Universidade Federal de Sergipe, São Cristóvão, 2010.
dc.identifier.uri.fl_str_mv https://ri.ufs.br/handle/riufs/3485
identifier_str_mv GONÇALVES, Jorge Antônio Vieira. Compósitos à base de resina epóxi reforçados com fibra de coco. 2010. 60 f. Dissertação (Mestrado em Engenharia de Materiais) - Universidade Federal de Sergipe, São Cristóvão, 2010.
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