Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/923 |
Resumo: | In this work, hybrid electrical conductive nanocomposites structures with potential to be applied in conductive and electrostatic dissipative devices were obtained. Such structures were produced by combining two types of nanofiller in a matrix of thermosetting epoxy resin of diglycidyl ether of bisphenol A (DGEBA). The nanofiller were polymeric nanofibers and conductive nanofillers: multi-walled carbon nanotubes (MWCNTs) and metallic copper nanowires (CuNWs). Three different arrangements for obtaining the structures were employed and compared. The starting materials, the electrospun nanofibers and composite structures were characterized morphologically by scanning (SEM) and transmission (TEM) electron microscopy, structurally by X-ray diffraction (XRD) and infrared spectroscopy (FTIR), thermally by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), mechanically by mechanical tests of short duration (tensile strength and impact) and electrically by four point probe. The results showed that the production of the structures were successfully done by two routes. In the first route, the fibrous, consisting of layers of polyamide 6 (PA6) nanofibers, were sanduiched with epoxy resin loaded with MWCNT. Such structures exhibit electrical conductivities between 105-1012 (Ωcm) and, therefore, can be used as conductive and electrostatic dissipative devices. In a second route, by the electrospinning technique, nanofibers with embedded CuNWs or MWCNTs were produced. The results show that the nanofiber produced were nonconductive and therefore unsuitable for conduction or dissipation. Then, in a third route, nanofibers mats of PA6/polyaniline (PAni) blend and PA6/MWCNT nanocomposites were subjected to a treatment to promote surface adsorption of MWCNT resulting in conductive nanofibers mats. Such mats have been used for the production of structures. The structures exhibit conductivities in the range of 107 (Ωcm) and better combinations of elasticity modulus and impact resistance. |
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Santos, João Paulo FerreiraBretas, Rosario Elida Sumanhttp://genos.cnpq.br:12010/dwlattes/owa/consultapesq.prc_querylisthttp://lattes.cnpq.br/10533366702596912016-06-02T19:12:36Z2014-08-212016-06-02T19:12:36Z2013-03-28SANTOS, João Paulo Ferreira. Hybrid conductive polymer nanocomposites structures. 2013. 202 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2013.https://repositorio.ufscar.br/handle/ufscar/923In this work, hybrid electrical conductive nanocomposites structures with potential to be applied in conductive and electrostatic dissipative devices were obtained. Such structures were produced by combining two types of nanofiller in a matrix of thermosetting epoxy resin of diglycidyl ether of bisphenol A (DGEBA). The nanofiller were polymeric nanofibers and conductive nanofillers: multi-walled carbon nanotubes (MWCNTs) and metallic copper nanowires (CuNWs). Three different arrangements for obtaining the structures were employed and compared. The starting materials, the electrospun nanofibers and composite structures were characterized morphologically by scanning (SEM) and transmission (TEM) electron microscopy, structurally by X-ray diffraction (XRD) and infrared spectroscopy (FTIR), thermally by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), mechanically by mechanical tests of short duration (tensile strength and impact) and electrically by four point probe. The results showed that the production of the structures were successfully done by two routes. In the first route, the fibrous, consisting of layers of polyamide 6 (PA6) nanofibers, were sanduiched with epoxy resin loaded with MWCNT. Such structures exhibit electrical conductivities between 105-1012 (Ωcm) and, therefore, can be used as conductive and electrostatic dissipative devices. In a second route, by the electrospinning technique, nanofibers with embedded CuNWs or MWCNTs were produced. The results show that the nanofiber produced were nonconductive and therefore unsuitable for conduction or dissipation. Then, in a third route, nanofibers mats of PA6/polyaniline (PAni) blend and PA6/MWCNT nanocomposites were subjected to a treatment to promote surface adsorption of MWCNT resulting in conductive nanofibers mats. Such mats have been used for the production of structures. The structures exhibit conductivities in the range of 107 (Ωcm) and better combinations of elasticity modulus and impact resistance.Neste trabalho, estruturas de nanocompósitos híbridos condutores elétricos com potencial de serem aplicadas em dispositivos condutores e eletrostaticamente dissipativos, foram obtidas. Tais estruturas foram produzidas pela combinação de dois tipos de nanocargas em uma matriz termofixa da resina epóxi diglicidil éter do bisfenol A (DGEBA). As nanocargas foram: nanofibras poliméricas e nanocargas condutoras: nanotubos de carbono de paredes múltiplas (MWCNTs) e nanofibras metálicas de cobre (CuNWs). Três arranjos diferentes para a obtenção das estruturas foram empregados e comparados. Os materiais iniciais, mantas eletrofiadas e estruturas compósitas finais foram caracterizados morfologicamente por microscopia eletrônica de varredura (MEV) e de transmissão (MET), estruturalmente por difração de raios X (DRX) e espectroscopia no infravermelho (FTIR), termicamente por calorimetria diferencial de varredura (DSC) e análise termogravimétrica (TGA), mecanicamente por ensaios mecânicos de curta duração (tração e impacto) e eletricamente por quatro pontas. Os resultados mostraram que a produção das estruturas foi feita com sucesso por dois dos arranjos empregados. No primeiro arranjo, os reforços fibrosos, constituídos por mantas de poliamida 6 (PA6), foram incorporados de forma alternada com a resina epoxídica carregada com os MWCNT. Tais estruturas exibiram condutividades elétricas entre 105 a 1012 (Ωcm), domonstrando potencial para aplicação em dispositivos condutores e eletrostaticamente dissipativos. Em uma segunda rota, pela técnica de eletrofiação, foram produzidas nanofibras de nanocompósitos constituídas de uma matriz polimérica nanofibrilar na qual foram embutidos MWCNTs ou CuNWs. Os resultados mostraram que as mantas de nanofibras produzidas não eram condutoras e, portanto, inadequadas para a condução ou dissipação de energia. Então, em uma terceira rota, mantas de nanofibras da blenda PA6/Polianilina (PAni) e de nanocompósitos PA6/MWCNT foram submetidas a um tratamento de adsorção superficial de MWCNT resultando em mantas de nanofibras condutoras. Tais mantas foram utilizadas para a produção das estruturas. O resultado foi a obtenção de estruturas com condutividades na faixa de 107(Ωcm) e, paralelamente, com maiores combinações de módulos de elasticidade e de resistência ao impacto.Universidade Federal de Minas Geraisapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarBRPolímerosNanocompósitos poliméricosEletrofiaçãoNanotubos de carbonoENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAObtenção de estruturas de nanocompósitos poliméricos híbridos condutoresHybrid conductive polymer nanocomposites structuresinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL6079.pdfapplication/pdf10588978https://{{ getenv "DSPACE_HOST" "repositorio.ufscar.br" }}/bitstream/ufscar/923/1/6079.pdff04e9f13c5498ac9c0df5fdfbca92f1bMD51TEXT6079.pdf.txt6079.pdf.txtExtracted texttext/plain0https://{{ getenv "DSPACE_HOST" "repositorio.ufscar.br" }}/bitstream/ufscar/923/2/6079.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD52THUMBNAIL6079.pdf.jpg6079.pdf.jpgIM Thumbnailimage/jpeg6155https://{{ getenv "DSPACE_HOST" "repositorio.ufscar.br" }}/bitstream/ufscar/923/3/6079.pdf.jpgaaa34d347c5519e21972ac9916439066MD53ufscar/9232019-09-11 04:04:51.278oai:repositorio.ufscar.br:ufscar/923Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222019-09-11T04:04:51Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores |
dc.title.alternative.eng.fl_str_mv |
Hybrid conductive polymer nanocomposites structures |
title |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores |
spellingShingle |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores Santos, João Paulo Ferreira Polímeros Nanocompósitos poliméricos Eletrofiação Nanotubos de carbono ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores |
title_full |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores |
title_fullStr |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores |
title_full_unstemmed |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores |
title_sort |
Obtenção de estruturas de nanocompósitos poliméricos híbridos condutores |
author |
Santos, João Paulo Ferreira |
author_facet |
Santos, João Paulo Ferreira |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/1053336670259691 |
dc.contributor.author.fl_str_mv |
Santos, João Paulo Ferreira |
dc.contributor.advisor1.fl_str_mv |
Bretas, Rosario Elida Suman |
dc.contributor.advisor1Lattes.fl_str_mv |
http://genos.cnpq.br:12010/dwlattes/owa/consultapesq.prc_querylist |
contributor_str_mv |
Bretas, Rosario Elida Suman |
dc.subject.por.fl_str_mv |
Polímeros Nanocompósitos poliméricos Eletrofiação Nanotubos de carbono |
topic |
Polímeros Nanocompósitos poliméricos Eletrofiação Nanotubos de carbono ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
In this work, hybrid electrical conductive nanocomposites structures with potential to be applied in conductive and electrostatic dissipative devices were obtained. Such structures were produced by combining two types of nanofiller in a matrix of thermosetting epoxy resin of diglycidyl ether of bisphenol A (DGEBA). The nanofiller were polymeric nanofibers and conductive nanofillers: multi-walled carbon nanotubes (MWCNTs) and metallic copper nanowires (CuNWs). Three different arrangements for obtaining the structures were employed and compared. The starting materials, the electrospun nanofibers and composite structures were characterized morphologically by scanning (SEM) and transmission (TEM) electron microscopy, structurally by X-ray diffraction (XRD) and infrared spectroscopy (FTIR), thermally by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), mechanically by mechanical tests of short duration (tensile strength and impact) and electrically by four point probe. The results showed that the production of the structures were successfully done by two routes. In the first route, the fibrous, consisting of layers of polyamide 6 (PA6) nanofibers, were sanduiched with epoxy resin loaded with MWCNT. Such structures exhibit electrical conductivities between 105-1012 (Ωcm) and, therefore, can be used as conductive and electrostatic dissipative devices. In a second route, by the electrospinning technique, nanofibers with embedded CuNWs or MWCNTs were produced. The results show that the nanofiber produced were nonconductive and therefore unsuitable for conduction or dissipation. Then, in a third route, nanofibers mats of PA6/polyaniline (PAni) blend and PA6/MWCNT nanocomposites were subjected to a treatment to promote surface adsorption of MWCNT resulting in conductive nanofibers mats. Such mats have been used for the production of structures. The structures exhibit conductivities in the range of 107 (Ωcm) and better combinations of elasticity modulus and impact resistance. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-03-28 |
dc.date.available.fl_str_mv |
2014-08-21 2016-06-02T19:12:36Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:12:36Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SANTOS, João Paulo Ferreira. Hybrid conductive polymer nanocomposites structures. 2013. 202 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2013. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/923 |
identifier_str_mv |
SANTOS, João Paulo Ferreira. Hybrid conductive polymer nanocomposites structures. 2013. 202 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2013. |
url |
https://repositorio.ufscar.br/handle/ufscar/923 |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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