AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO

Detalhes bibliográficos
Autor(a) principal: Santos, Pâmela Andréa Mantey dos
Data de Publicação: 2011
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional Universidade Franciscana
Texto Completo: http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/256
http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/288
Resumo: It is well known in the scientific community the importance of carbon nanotubes viewed first by Iijima in 90 s. Carbon nanotubes show great potential in many applications in different fields of knowledge, especially in the development of new materials. Several studies introduce applications of carbon nanotubes as reinforcement in many types of matrices such as ceramics and polymers, which are subjected to high pressure, in order to improve the mechanical properties of these materials. These studies are intended to use these compacts as electronic devices, mechanical applications, waveguides, and others. However, there are no studies in literature about application of high pressure on carbon nanotubes self-sustaining, that is, only carbon nanotubes, in order to obtain dense compacts, for possible applications of these materials. Thus, this work brings innovative ways of application of high pressure on multi- walled carbon nanotubes using two different pressure transmitting media, to evaluate their behavior. These evaluations were performed by characterizations such as Raman spectroscopy. It was estimated the defect level in the samples and also the dependence of the G band with pressure and with the pressure transmitting media used. It s possible to associate this relationship to the level of tension and/or compression that carbon nanotubes were submitted. X-ray diffraction allowed determination of impurities trapped in carbon nanotubes in its manufacturing process, suggesting that these impurities may possibly act as binding in compression. By surface area measurements using the BET method, it was possible to compare the surface areas of the samples in different pressure transmitting media and its influence on compression. Finally, transmission electron microscopy was used to get images of the samples, which enabled an assessment of the morphology of carbon nanotubes after different processes.
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spelling Silva, Ivana Zanella daCPF:94305382091http://lattes.cnpq.br/7107334055877180Gallas, Márcia RussmanCPF:63192624000http://lattes.cnpq.br/1677737840512754CPF:00209466006http://lattes.cnpq.br/0533829182317200Santos, Pâmela Andréa Mantey dos2018-06-27T18:56:01Z2011-03-25SANTOS, Pâmela Andréa Mantey dos. AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO. 2011. 84 f. Dissertação (Mestrado em Biociências e Nanomateriais) - Universidade Franciscana, Santa Maria, 2011.http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/256http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/288It is well known in the scientific community the importance of carbon nanotubes viewed first by Iijima in 90 s. Carbon nanotubes show great potential in many applications in different fields of knowledge, especially in the development of new materials. Several studies introduce applications of carbon nanotubes as reinforcement in many types of matrices such as ceramics and polymers, which are subjected to high pressure, in order to improve the mechanical properties of these materials. These studies are intended to use these compacts as electronic devices, mechanical applications, waveguides, and others. However, there are no studies in literature about application of high pressure on carbon nanotubes self-sustaining, that is, only carbon nanotubes, in order to obtain dense compacts, for possible applications of these materials. Thus, this work brings innovative ways of application of high pressure on multi- walled carbon nanotubes using two different pressure transmitting media, to evaluate their behavior. These evaluations were performed by characterizations such as Raman spectroscopy. It was estimated the defect level in the samples and also the dependence of the G band with pressure and with the pressure transmitting media used. It s possible to associate this relationship to the level of tension and/or compression that carbon nanotubes were submitted. X-ray diffraction allowed determination of impurities trapped in carbon nanotubes in its manufacturing process, suggesting that these impurities may possibly act as binding in compression. By surface area measurements using the BET method, it was possible to compare the surface areas of the samples in different pressure transmitting media and its influence on compression. Finally, transmission electron microscopy was used to get images of the samples, which enabled an assessment of the morphology of carbon nanotubes after different processes.Já é de conhecimento da comunidade científica a grande importância dos nanotubos de carbono referenciados pela primeira vez por Iijima, nos anos 90. Os nanotubos de carbono demonstraram ter um grande potencial em diversas aplicações, nas mais variadas áreas do conhecimento, especialmente no desenvolvimento de novos materiais. Vários trabalhos na literatura trazem a aplicação de NTC como reforço em matrizes poliméricas, também trabalhos envolvendo matrizes cerâmicas são encontrados. Entre esses, alguns materiais são submetidos à alta pressão, com a finalidade de aprimorar as suas propriedades mecânicas. Porém, não há trabalhos na literatura que tratam da aplicação de alta pressão em NTC de forma auto-sustentada, isto é, somente NTC, para obtenção de compactos densos, para uma possível aplicação destes materiais. Assim sendo, este trabalho traz de forma inovadora a aplicação de alta pressão (até 7,7 GPa) em nanotubos de carbono de paredes múltiplas, em dois distintos meios transmissores de pressão, para avaliação e compreensão de seu comportamento. Estas amostras foram caracterizadas através de espectroscopia Raman, onde é possível verificar o nível de defeito nas amostras e também a dependência da banda G com a pressão e o meio transmissor utilizado, sendo possível avaliar através desta relação o nível de tração e/ou compressão a que foram submetidos os nanotubos de carbono. Através da técnica de difração de raios X foi possível determinar as impurezas retidas nos nanotubos de carbono, no seu processo de fabricação, sugerindo-se que estas impurezas podem eventualmente atuar como ligantes na compactação. Através de medidas de área superficial utilizando o método de BET, foi possível a comparação das áreas superficiais das amostras nos diferentes meios transmissores de pressão e a influência do meio transmissor na compactação. Por fim, foram obtidas imagens das amostras, através da técnica de microscopia eletrônica de transmissão, a qual possibilitou uma avaliação da morfologia dos nanotubos de carbono após os diferentes processamentos.Made available in DSpace on 2018-06-27T18:56:01Z (GMT). No. of bitstreams: 2 Pamela Andrea Mantey dos Santos.pdf: 2526880 bytes, checksum: 65765d7ccb4a7545ed4eba0ac7107949 (MD5) Pamela Andrea Mantey dos Santos.pdf.jpg: 3186 bytes, checksum: 0f9641eb6b0cc6bd929c9c7c3f165b1b (MD5) Previous issue date: 2011-03-25Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfhttp://tede.universidadefranciscana.edu.br:8080/retrieve/445/Pamela%20Andrea%20Mantey%20dos%20Santos.pdf.jpgporUniversidade FranciscanaMestrado Acadêmico em NanociênciasUFNBRBiociências e Nanomateriaisnanotubos de carbono de paredes múltiplasalta pressãoespectroscopia RamanMulti- walled carbon nanotubeshigh pressureRaman spectroscopyCNPQ::ENGENHARIASAVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃOinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional Universidade Franciscanainstname:Universidade Franciscana (UFN)instacron:UFNORIGINALPamela Andrea Mantey dos Santos.pdfapplication/pdf2526880http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/288/1/Pamela+Andrea+Mantey+dos+Santos.pdf65765d7ccb4a7545ed4eba0ac7107949MD51THUMBNAILPamela Andrea Mantey dos Santos.pdf.jpgimage/jpeg3186http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/288/2/Pamela+Andrea+Mantey+dos+Santos.pdf.jpg0f9641eb6b0cc6bd929c9c7c3f165b1bMD52UFN-BDTD/2882018-06-27 15:56:01.438oai:tede.universidadefranciscana.edu.br:UFN-BDTD/288Repositório de Publicaçõeshttp://www.tede.universidadefranciscana.edu.br:8080/http://www.tede.universidadefranciscana.edu.br:8080/oai/requestopendoar:2018-06-27T18:56:01Repositório Institucional Universidade Franciscana - Universidade Franciscana (UFN)false
dc.title.por.fl_str_mv AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
title AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
spellingShingle AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
Santos, Pâmela Andréa Mantey dos
nanotubos de carbono de paredes múltiplas
alta pressão
espectroscopia Raman
Multi- walled carbon nanotubes
high pressure
Raman spectroscopy
CNPQ::ENGENHARIAS
title_short AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
title_full AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
title_fullStr AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
title_full_unstemmed AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
title_sort AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO
author Santos, Pâmela Andréa Mantey dos
author_facet Santos, Pâmela Andréa Mantey dos
author_role author
dc.contributor.advisor1.fl_str_mv Silva, Ivana Zanella da
dc.contributor.advisor1ID.fl_str_mv CPF:94305382091
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/7107334055877180
dc.contributor.advisor-co1.fl_str_mv Gallas, Márcia Russman
dc.contributor.advisor-co1ID.fl_str_mv CPF:63192624000
dc.contributor.advisor-co1Lattes.fl_str_mv http://lattes.cnpq.br/1677737840512754
dc.contributor.authorID.fl_str_mv CPF:00209466006
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/0533829182317200
dc.contributor.author.fl_str_mv Santos, Pâmela Andréa Mantey dos
contributor_str_mv Silva, Ivana Zanella da
Gallas, Márcia Russman
dc.subject.por.fl_str_mv nanotubos de carbono de paredes múltiplas
alta pressão
espectroscopia Raman
topic nanotubos de carbono de paredes múltiplas
alta pressão
espectroscopia Raman
Multi- walled carbon nanotubes
high pressure
Raman spectroscopy
CNPQ::ENGENHARIAS
dc.subject.eng.fl_str_mv Multi- walled carbon nanotubes
high pressure
Raman spectroscopy
dc.subject.cnpq.fl_str_mv CNPQ::ENGENHARIAS
description It is well known in the scientific community the importance of carbon nanotubes viewed first by Iijima in 90 s. Carbon nanotubes show great potential in many applications in different fields of knowledge, especially in the development of new materials. Several studies introduce applications of carbon nanotubes as reinforcement in many types of matrices such as ceramics and polymers, which are subjected to high pressure, in order to improve the mechanical properties of these materials. These studies are intended to use these compacts as electronic devices, mechanical applications, waveguides, and others. However, there are no studies in literature about application of high pressure on carbon nanotubes self-sustaining, that is, only carbon nanotubes, in order to obtain dense compacts, for possible applications of these materials. Thus, this work brings innovative ways of application of high pressure on multi- walled carbon nanotubes using two different pressure transmitting media, to evaluate their behavior. These evaluations were performed by characterizations such as Raman spectroscopy. It was estimated the defect level in the samples and also the dependence of the G band with pressure and with the pressure transmitting media used. It s possible to associate this relationship to the level of tension and/or compression that carbon nanotubes were submitted. X-ray diffraction allowed determination of impurities trapped in carbon nanotubes in its manufacturing process, suggesting that these impurities may possibly act as binding in compression. By surface area measurements using the BET method, it was possible to compare the surface areas of the samples in different pressure transmitting media and its influence on compression. Finally, transmission electron microscopy was used to get images of the samples, which enabled an assessment of the morphology of carbon nanotubes after different processes.
publishDate 2011
dc.date.issued.fl_str_mv 2011-03-25
dc.date.accessioned.fl_str_mv 2018-06-27T18:56:01Z
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dc.identifier.citation.fl_str_mv SANTOS, Pâmela Andréa Mantey dos. AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO. 2011. 84 f. Dissertação (Mestrado em Biociências e Nanomateriais) - Universidade Franciscana, Santa Maria, 2011.
dc.identifier.uri.fl_str_mv http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/256
http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/288
identifier_str_mv SANTOS, Pâmela Andréa Mantey dos. AVALIAÇÃO DE NANOTUBOS DE CARBONO SUBMETIDOS À ALTA PRESSÃO. 2011. 84 f. Dissertação (Mestrado em Biociências e Nanomateriais) - Universidade Franciscana, Santa Maria, 2011.
url http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/256
http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/288
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dc.publisher.department.fl_str_mv Biociências e Nanomateriais
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