S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite
Ano de defesa: | 2015 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Tese |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Pontif?cia Universidade Cat?lica do Rio Grande do Sul
|
Programa de Pós-Graduação: |
Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais
|
Departamento: |
Faculdade de Engenharia
|
País: |
Brasil
|
Palavras-chave em Português: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://tede2.pucrs.br/tede2/handle/tede/6152 |
Resumo: | The research work is related to the preparation of polymer composites based on polyaniline (PAni) and graphite. Polyaniline nanofibers were synthesized by the method of rapid mixing. Hybrid load (PAni/NLG) was synthesized by polymerizing aniline in the presence of graphite nanosheets (NLG). Polymer composites were prepared using differents methodologies: melt blending and in situ polymerization. In preparing polymer composites of polyethylene (PE)/PAni, PE/NLG and PE/PAni/NLG by in situ polymerization, the catalyst system was used Cp2ZrCl2/MAO. Polymeric composites by melt blending with the melt PE and conductive load were prepared in the melting chamber. The conductive loads as well as those produced composites were characterized by Scanning Electron Microscopy (SEM), TGA (Thermogravimetric Analysis), DSC (Differential Scanning Calorimetry) and electrical properties (Probe Two Tips). Rapid mixing, nanofiber synthesis methodology was efficient, as were prepared nanofibers with a diameter of approximately 50-80 nm and with yield of the synthesis reaction of 23%. From the results it was found that the in situ polymerization was the most suitable method to produce polymeric composites in the presence of polyaniline, as the composite exhibited good load dispersion inducing the formation of the conductive network. The presence of graphite in hybrid material improves electrical conductivity of composites and the quality of nanofibers is affected positively. The methodology of the mixture by melting was not efficient to disperse the nanofiber Pani in PE matrix. |
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Basso, Nara Regina de Souza430.221.890-87http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4728110T2818.587.360-72http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4130822Y9Graebin, Ana Paula2015-06-19T11:25:03Z2015-03-23http://tede2.pucrs.br/tede2/handle/tede/6152The research work is related to the preparation of polymer composites based on polyaniline (PAni) and graphite. Polyaniline nanofibers were synthesized by the method of rapid mixing. Hybrid load (PAni/NLG) was synthesized by polymerizing aniline in the presence of graphite nanosheets (NLG). Polymer composites were prepared using differents methodologies: melt blending and in situ polymerization. In preparing polymer composites of polyethylene (PE)/PAni, PE/NLG and PE/PAni/NLG by in situ polymerization, the catalyst system was used Cp2ZrCl2/MAO. Polymeric composites by melt blending with the melt PE and conductive load were prepared in the melting chamber. The conductive loads as well as those produced composites were characterized by Scanning Electron Microscopy (SEM), TGA (Thermogravimetric Analysis), DSC (Differential Scanning Calorimetry) and electrical properties (Probe Two Tips). Rapid mixing, nanofiber synthesis methodology was efficient, as were prepared nanofibers with a diameter of approximately 50-80 nm and with yield of the synthesis reaction of 23%. From the results it was found that the in situ polymerization was the most suitable method to produce polymeric composites in the presence of polyaniline, as the composite exhibited good load dispersion inducing the formation of the conductive network. The presence of graphite in hybrid material improves electrical conductivity of composites and the quality of nanofibers is affected positively. The methodology of the mixture by melting was not efficient to disperse the nanofiber Pani in PE matrix.O trabalho de pesquisa est? relacionado com a prepara??o de comp?sitos de polietileno (PE) contendo carga condutiva baseadas na polianilina (PAni) e grafite. Nanofibras de PAni foram sintetizadas atrav?s do m?todo da mistura r?pida. Carga h?brida (PAni/NLG) foi sintetizada por meio da polimeriza??o da anilina na presen?a de nanol?minas de grafite (NLG). Comp?sitos foram preparados utilizando-se diferentes metodologias: mistura por fus?o e polimeriza??o in situ. Na prepara??o de comp?sitos polim?ricos de polietileno (PE)/PAni, PE/NLG e PE/PAni/NLG, por meio da polimeriza??o in situ, foi utilizado sistema catal?tico Cp2ZrCl2/MAO. As cargas condutivas assim como os comp?sitos produzidos foram caracterizados por MEV (Microscopia Eletr?nica de varredura), TGA (An?lise Termogravim?trica), DSC (Calorimetria Diferencial de Varredura) e propriedades el?tricas (Sonda de Duas Pontas). A intera??o entre a PAni e o sistema catal?tico Cp2ZrCl2/MAO foi investigada atrav?s da T?cnica da Voltametria C?clica e de Pulso Diferencial. A mistura r?pida, metodologia de s?ntese de nanofibras mostrou-se eficiente, pois foram preparadas nanofibras com di?metro de aproximadamente 50-80 nm e com rendimento de rea??o de 23%. A partir dos resultados constatou-se que a polimeriza?ao in situ foi a metodologia mais adequada para produzir comp?sitos polim?ricos na presen?a de PAni, visto que os comp?sitos apresentaram boa dispers?o da carga induzindo ? forma??o da rede condutiva. A presen?a de grafite no material h?brido melhora a condutividade el?trica dos comp?sitos e a qualidade das nanofibras ? afetada positivamente. A metodologia da mistura por fus?o n?o foi eficiente para dispersar as nanofibras de Pani na matriz de PE.Submitted by Setor de Tratamento da Informa??o - BC/PUCRS (tede2@pucrs.br) on 2015-06-19T11:25:03Z No. of bitstreams: 1 470698 - Texto Completo.pdf: 3211899 bytes, checksum: 304adc552bbe30591d967a6721608b0c (MD5)Made available in DSpace on 2015-06-19T11:25:03Z (GMT). No. of bitstreams: 1 470698 - Texto Completo.pdf: 3211899 bytes, checksum: 304adc552bbe30591d967a6721608b0c (MD5) Previous issue date: 2015-03-23Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPESapplication/pdfhttp://tede2.pucrs.br:80/tede2/retrieve/163072/470698%20-%20Texto%20Completo.pdf.jpgporPontif?cia Universidade Cat?lica do Rio Grande do SulPrograma de P?s-Gradua??o em Engenharia e Tecnologia de MateriaisPUCRSBrasilFaculdade de EngenhariaENGENHARIA DE MATERIAISQU?MICA INDUSTRIALPROCESSOS QU?MICOS - S?NTESEPOLIMERIZA??OPOL?MEROSNANOCOMP?SITOSENGENHARIASS?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafiteinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis-7432719344215120122600600600600-65577057276143978545189710564848268252075167498588264571info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da PUC_RSinstname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)instacron:PUC_RSTHUMBNAIL470698 - Texto Completo.pdf.jpg470698 - Texto Completo.pdf.jpgimage/jpeg4141http://tede2.pucrs.br/tede2/bitstream/tede/6152/4/470698+-+Texto+Completo.pdf.jpge78c9959cd49a56a2cd2173880153b79MD54TEXT470698 - Texto Completo.pdf.txt470698 - Texto Completo.pdf.txttext/plain217010http://tede2.pucrs.br/tede2/bitstream/tede/6152/3/470698+-+Texto+Completo.pdf.txt78e50b1d5d7b8f692ae622b71e7c1dd8MD53ORIGINAL470698 - Texto Completo.pdf470698 - Texto Completo.pdfapplication/pdf3211899http://tede2.pucrs.br/tede2/bitstream/tede/6152/2/470698+-+Texto+Completo.pdf304adc552bbe30591d967a6721608b0cMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-8610http://tede2.pucrs.br/tede2/bitstream/tede/6152/1/license.txt5a9d6006225b368ef605ba16b4f6d1beMD51tede/61522015-09-29 08:27:39.063oai:tede2.pucrs.br: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Biblioteca Digital de Teses e Dissertaçõeshttp://tede2.pucrs.br/tede2/PRIhttps://tede2.pucrs.br/oai/requestbiblioteca.central@pucrs.br||opendoar:2015-09-29T11:27:39Biblioteca Digital de Teses e Dissertações da PUC_RS - Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)false |
dc.title.por.fl_str_mv |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite |
title |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite |
spellingShingle |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite Graebin, Ana Paula ENGENHARIA DE MATERIAIS QU?MICA INDUSTRIAL PROCESSOS QU?MICOS - S?NTESE POLIMERIZA??O POL?MEROS NANOCOMP?SITOS ENGENHARIAS |
title_short |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite |
title_full |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite |
title_fullStr |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite |
title_full_unstemmed |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite |
title_sort |
S?ntese de comp?sitos baseados em polietileno/nanofibras de polianilina e grafite |
author |
Graebin, Ana Paula |
author_facet |
Graebin, Ana Paula |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Basso, Nara Regina de Souza |
dc.contributor.advisor1ID.fl_str_mv |
430.221.890-87 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4728110T2 |
dc.contributor.authorID.fl_str_mv |
818.587.360-72 |
dc.contributor.authorLattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4130822Y9 |
dc.contributor.author.fl_str_mv |
Graebin, Ana Paula |
contributor_str_mv |
Basso, Nara Regina de Souza |
dc.subject.por.fl_str_mv |
ENGENHARIA DE MATERIAIS QU?MICA INDUSTRIAL PROCESSOS QU?MICOS - S?NTESE POLIMERIZA??O POL?MEROS NANOCOMP?SITOS |
topic |
ENGENHARIA DE MATERIAIS QU?MICA INDUSTRIAL PROCESSOS QU?MICOS - S?NTESE POLIMERIZA??O POL?MEROS NANOCOMP?SITOS ENGENHARIAS |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS |
description |
The research work is related to the preparation of polymer composites based on polyaniline (PAni) and graphite. Polyaniline nanofibers were synthesized by the method of rapid mixing. Hybrid load (PAni/NLG) was synthesized by polymerizing aniline in the presence of graphite nanosheets (NLG). Polymer composites were prepared using differents methodologies: melt blending and in situ polymerization. In preparing polymer composites of polyethylene (PE)/PAni, PE/NLG and PE/PAni/NLG by in situ polymerization, the catalyst system was used Cp2ZrCl2/MAO. Polymeric composites by melt blending with the melt PE and conductive load were prepared in the melting chamber. The conductive loads as well as those produced composites were characterized by Scanning Electron Microscopy (SEM), TGA (Thermogravimetric Analysis), DSC (Differential Scanning Calorimetry) and electrical properties (Probe Two Tips). Rapid mixing, nanofiber synthesis methodology was efficient, as were prepared nanofibers with a diameter of approximately 50-80 nm and with yield of the synthesis reaction of 23%. From the results it was found that the in situ polymerization was the most suitable method to produce polymeric composites in the presence of polyaniline, as the composite exhibited good load dispersion inducing the formation of the conductive network. The presence of graphite in hybrid material improves electrical conductivity of composites and the quality of nanofibers is affected positively. The methodology of the mixture by melting was not efficient to disperse the nanofiber Pani in PE matrix. |
publishDate |
2015 |
dc.date.accessioned.fl_str_mv |
2015-06-19T11:25:03Z |
dc.date.issued.fl_str_mv |
2015-03-23 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://tede2.pucrs.br/tede2/handle/tede/6152 |
url |
http://tede2.pucrs.br/tede2/handle/tede/6152 |
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por |
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por |
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600 600 600 600 |
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4518971056484826825 |
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info:eu-repo/semantics/openAccess |
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Pontif?cia Universidade Cat?lica do Rio Grande do Sul |
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Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais |
dc.publisher.initials.fl_str_mv |
PUCRS |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Faculdade de Engenharia |
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Pontif?cia Universidade Cat?lica do Rio Grande do Sul |
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