Caracterização da alumina anódica porosa modificada por plasma
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/8331 |
Resumo: | In this study, the wettability of porous anodic alumina (PAA) surfaces modified by plasma was investigated. The porous anodic alumina films were grown on aluminum substrate using a two step anodization procedure in oxalic acid solution under potentiostatic regime. The surfaces of PAA films were modified by plasma treatment or plasma deposition techniques. Prior to surface modification, the impurities were removed by a plasma cleaning procedure. Oxygen was used in plasma treatment in order to produce hydrophilic surfaces. On the other hand, the plasma deposition (in HMDSO or HMDSO + argon mixture) was performed to produce hydrophobic surfaces or less hydrophilic surface. Electropolished aluminum without PAA film were used as reference. The influence of substrate morphology on wettability was analyzed. The morphological characterization was performed by scanning electron microscopy (SEM). The microstructural analysis was carried out using Fourier Transformed Infrared Spectroscopy (FTIR). A goniometer was used to measure the contact angle and evaluate the wettability of electroplished aluminum and PAA films. The results showed that the wettability of the samples was affect by chemical interactions of functional groups on the surface deposited after plasma treatment. The effect of the porous surface morphology on wettability was not significant compared to the plasma treated films with new chemical interactions effects. |
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Silva, Karina Rodrigues daTrivinho-Strixino, Franciscohttp://lattes.cnpq.br/9740223649776400http://lattes.cnpq.br/4880226928544532c6e6ec32-bf82-4195-a2d3-8e672c017f622016-11-17T17:43:54Z2016-11-17T17:43:54Z2015-06-29SILVA, Karina Rodrigues da. Caracterização da alumina anódica porosa modificada por plasma. 2015. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/8331.https://repositorio.ufscar.br/handle/ufscar/8331In this study, the wettability of porous anodic alumina (PAA) surfaces modified by plasma was investigated. The porous anodic alumina films were grown on aluminum substrate using a two step anodization procedure in oxalic acid solution under potentiostatic regime. The surfaces of PAA films were modified by plasma treatment or plasma deposition techniques. Prior to surface modification, the impurities were removed by a plasma cleaning procedure. Oxygen was used in plasma treatment in order to produce hydrophilic surfaces. On the other hand, the plasma deposition (in HMDSO or HMDSO + argon mixture) was performed to produce hydrophobic surfaces or less hydrophilic surface. Electropolished aluminum without PAA film were used as reference. The influence of substrate morphology on wettability was analyzed. The morphological characterization was performed by scanning electron microscopy (SEM). The microstructural analysis was carried out using Fourier Transformed Infrared Spectroscopy (FTIR). A goniometer was used to measure the contact angle and evaluate the wettability of electroplished aluminum and PAA films. The results showed that the wettability of the samples was affect by chemical interactions of functional groups on the surface deposited after plasma treatment. The effect of the porous surface morphology on wettability was not significant compared to the plasma treated films with new chemical interactions effects.Neste trabalho foram investigadas as propriedades de molhabilidade das superfícies nanoestruturadas da alumina anódica porosa (AAP) modificadas por plasma. Os filmes de AAP foram produzidos sobre substrato de alumínio pelo método de anodização potenciostática em duas etapas em solução de ácido oxálico. Após a fabricação, as amostras foram submetidas a um tratamento a plasma (com oxigênio) ou a deposição a plasma (em HMDSO ou em uma mistura de HMDSO e argônio). Antes das modificações das superfícies, removeram-se as impurezas das amostras através de técnicas de limpeza a plasma. No tratamento a plasma, o gás oxigênio foi utilizado para a obtenção de superfícies hidrofílicas. Por outro lado, para tornar a superfície hidrofóbica ou menos hidrofílica, foram feitas duas séries de deposição a plasma, uma contendo uma mistura de argônio e HMDSO e outra série somente com HMDSO. O tratamento ou deposição a plasma também foram feitas em amostras de alumínio eletropolido, sem a camada de AAP, a fim de verificar a influência morfológica do substrato na molhabilidade. A caracterização morfológica dos filmes de AAP foi feita por microscopia eletrônica de varredura (MEV), onde foi verificada a formação dos poros na superfície. A caracterização microestrutural foi feita por espectroscopia de absorção no infravermelho por transformada de Fourier (FTIR) com o objetivo de verificar as alterações químicas na superfície. A molhabilidade foi analisada utilizando um goniômetro, equipamento que realiza medição direta do ângulo de contato. Os resultados mostram que a molhabilidade da superfície é afetada por interações químicas dos grupos funcionais na superfície dos filmes. Por outro lado, o efeito da morfologia sobre a molhabilidade da superfície não é significativo nas condições estudadas.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)porUniversidade Federal de São CarlosCâmpus SorocabaPrograma de Pós-Graduação em Ciência dos Materiais - PPGCM-SoUFSCarModificação por plasmaMolhabilidadeÂngulo de contatoPlasmaAlumina anódica porosa (AAP)Óxido de alumínioMateriais nanoestruturadosMateriais nanoestruturadosPorous Anodic Alumina (PAA)Surface modificationWettabilityContact anglePlasma treatmentAluminum oxideNanostructured materialsOUTROSCaracterização da alumina anódica porosa modificada por plasmaCharacterization of alumina porous anodic modified by plasmainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline6006001ccf1c7e-4a41-4849-9704-d1bb24ebdeb6info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALRODRIGUES_Karina_2015.pdfRODRIGUES_Karina_2015.pdfapplication/pdf7918406https://repositorio.ufscar.br/bitstream/ufscar/8331/1/RODRIGUES_Karina_2015.pdf5c7eded70cc8a9dd00ce5c1b2d70d846MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstream/ufscar/8331/2/license.txtae0398b6f8b235e40ad82cba6c50031dMD52TEXTRODRIGUES_Karina_2015.pdf.txtRODRIGUES_Karina_2015.pdf.txtExtracted texttext/plain88329https://repositorio.ufscar.br/bitstream/ufscar/8331/3/RODRIGUES_Karina_2015.pdf.txt515446b2ecfb6c23327da5803f1815b2MD53THUMBNAILRODRIGUES_Karina_2015.pdf.jpgRODRIGUES_Karina_2015.pdf.jpgIM Thumbnailimage/jpeg5260https://repositorio.ufscar.br/bitstream/ufscar/8331/4/RODRIGUES_Karina_2015.pdf.jpg0516ff6f705f95c925591b63dfd07114MD54ufscar/83312023-09-18 18:32:23.217oai:repositorio.ufscar.br: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Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:32:23Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Caracterização da alumina anódica porosa modificada por plasma |
dc.title.alternative.eng.fl_str_mv |
Characterization of alumina porous anodic modified by plasma |
title |
Caracterização da alumina anódica porosa modificada por plasma |
spellingShingle |
Caracterização da alumina anódica porosa modificada por plasma Silva, Karina Rodrigues da Modificação por plasma Molhabilidade Ângulo de contato Plasma Alumina anódica porosa (AAP) Óxido de alumínio Materiais nanoestruturados Materiais nanoestruturados Porous Anodic Alumina (PAA) Surface modification Wettability Contact angle Plasma treatment Aluminum oxide Nanostructured materials OUTROS |
title_short |
Caracterização da alumina anódica porosa modificada por plasma |
title_full |
Caracterização da alumina anódica porosa modificada por plasma |
title_fullStr |
Caracterização da alumina anódica porosa modificada por plasma |
title_full_unstemmed |
Caracterização da alumina anódica porosa modificada por plasma |
title_sort |
Caracterização da alumina anódica porosa modificada por plasma |
author |
Silva, Karina Rodrigues da |
author_facet |
Silva, Karina Rodrigues da |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/4880226928544532 |
dc.contributor.author.fl_str_mv |
Silva, Karina Rodrigues da |
dc.contributor.advisor1.fl_str_mv |
Trivinho-Strixino, Francisco |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9740223649776400 |
dc.contributor.authorID.fl_str_mv |
c6e6ec32-bf82-4195-a2d3-8e672c017f62 |
contributor_str_mv |
Trivinho-Strixino, Francisco |
dc.subject.por.fl_str_mv |
Modificação por plasma Molhabilidade Ângulo de contato Plasma Alumina anódica porosa (AAP) Óxido de alumínio Materiais nanoestruturados Materiais nanoestruturados |
topic |
Modificação por plasma Molhabilidade Ângulo de contato Plasma Alumina anódica porosa (AAP) Óxido de alumínio Materiais nanoestruturados Materiais nanoestruturados Porous Anodic Alumina (PAA) Surface modification Wettability Contact angle Plasma treatment Aluminum oxide Nanostructured materials OUTROS |
dc.subject.eng.fl_str_mv |
Porous Anodic Alumina (PAA) Surface modification Wettability Contact angle Plasma treatment Aluminum oxide Nanostructured materials |
dc.subject.cnpq.fl_str_mv |
OUTROS |
description |
In this study, the wettability of porous anodic alumina (PAA) surfaces modified by plasma was investigated. The porous anodic alumina films were grown on aluminum substrate using a two step anodization procedure in oxalic acid solution under potentiostatic regime. The surfaces of PAA films were modified by plasma treatment or plasma deposition techniques. Prior to surface modification, the impurities were removed by a plasma cleaning procedure. Oxygen was used in plasma treatment in order to produce hydrophilic surfaces. On the other hand, the plasma deposition (in HMDSO or HMDSO + argon mixture) was performed to produce hydrophobic surfaces or less hydrophilic surface. Electropolished aluminum without PAA film were used as reference. The influence of substrate morphology on wettability was analyzed. The morphological characterization was performed by scanning electron microscopy (SEM). The microstructural analysis was carried out using Fourier Transformed Infrared Spectroscopy (FTIR). A goniometer was used to measure the contact angle and evaluate the wettability of electroplished aluminum and PAA films. The results showed that the wettability of the samples was affect by chemical interactions of functional groups on the surface deposited after plasma treatment. The effect of the porous surface morphology on wettability was not significant compared to the plasma treated films with new chemical interactions effects. |
publishDate |
2015 |
dc.date.issued.fl_str_mv |
2015-06-29 |
dc.date.accessioned.fl_str_mv |
2016-11-17T17:43:54Z |
dc.date.available.fl_str_mv |
2016-11-17T17:43:54Z |
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 |
SILVA, Karina Rodrigues da. Caracterização da alumina anódica porosa modificada por plasma. 2015. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/8331. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/8331 |
identifier_str_mv |
SILVA, Karina Rodrigues da. Caracterização da alumina anódica porosa modificada por plasma. 2015. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/8331. |
url |
https://repositorio.ufscar.br/handle/ufscar/8331 |
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por |
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600 600 |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus Sorocaba |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Ciência dos Materiais - PPGCM-So |
dc.publisher.initials.fl_str_mv |
UFSCar |
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Universidade Federal de São Carlos Câmpus Sorocaba |
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