Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/5162 |
Resumo: | Poly(vinylidene fluoride) (PVDF) has remarkable properties leading to electro-optics, electro-mechanical and biomedical applications. In particular its piezo- and pyroelectric properties provide possibilities for many technological applications. The semicrystalline nature of PVDF, combined with the occurrence of at least four crystalline phases implies a complicated physical microstructure. The most frequently described and important phase is the β. The piezo and pyro-electric properties mainly depend on this phase, so increasing the β phase content has always been a great concern. It is possible to obtain films in the β phase by solution but this material presents a high porosity leading to an opaque appearance and a decrease of the mechanical an electrical properties. In this work, porous films in the β phase were obtained directly from the solution at 600C. After applying pressure perpendicular to the surface of the film at elevated temperature, the pores in the original sample are eliminated. The changes on the morphology and crystallinity associated to the pressure applied to the samples were also studied. |
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Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phasePVDFProcessingCharacterizationElectroactive polymersFerroelectricsfilms and coatingsscanning electron microscopymicrostructureporosityFTIR measurementspolymers and organicscalorimetryScience & TechnologyPoly(vinylidene fluoride) (PVDF) has remarkable properties leading to electro-optics, electro-mechanical and biomedical applications. In particular its piezo- and pyroelectric properties provide possibilities for many technological applications. The semicrystalline nature of PVDF, combined with the occurrence of at least four crystalline phases implies a complicated physical microstructure. The most frequently described and important phase is the β. The piezo and pyro-electric properties mainly depend on this phase, so increasing the β phase content has always been a great concern. It is possible to obtain films in the β phase by solution but this material presents a high porosity leading to an opaque appearance and a decrease of the mechanical an electrical properties. In this work, porous films in the β phase were obtained directly from the solution at 600C. After applying pressure perpendicular to the surface of the film at elevated temperature, the pores in the original sample are eliminated. The changes on the morphology and crystallinity associated to the pressure applied to the samples were also studied.Fundação para a Ciência e a Tecnologia (FCT) - grants POCTI/CTM/33501/99, POCI/CTM/59425/2004, SFRH/BD/16543/2004.CNPq, FAPESP - program ALFA-PLASTINET.ElsevierUniversidade do MinhoSencadas, Vítor João Gomes SilvaGregório Júnior, R.Lanceros-Méndez, S.20062006-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/5162eng"Journal of Non-Crystalline Solids". ISSN 0022-3093. 352 (2006)0022-309310.1016/j.jnoncrysol.2006.02.052http://www.elsevier.com/wps/find/ journaldescription.cws_home/505709/ description#descriptioninfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:14:19Zoai:repositorium.sdum.uminho.pt:1822/5162Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:06:37.895627Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase |
title |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase |
spellingShingle |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase Sencadas, Vítor João Gomes Silva PVDF Processing Characterization Electroactive polymers Ferroelectrics films and coatings scanning electron microscopy microstructure porosity FTIR measurements polymers and organics calorimetry Science & Technology |
title_short |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase |
title_full |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase |
title_fullStr |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase |
title_full_unstemmed |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase |
title_sort |
Processing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase |
author |
Sencadas, Vítor João Gomes Silva |
author_facet |
Sencadas, Vítor João Gomes Silva Gregório Júnior, R. Lanceros-Méndez, S. |
author_role |
author |
author2 |
Gregório Júnior, R. Lanceros-Méndez, S. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Sencadas, Vítor João Gomes Silva Gregório Júnior, R. Lanceros-Méndez, S. |
dc.subject.por.fl_str_mv |
PVDF Processing Characterization Electroactive polymers Ferroelectrics films and coatings scanning electron microscopy microstructure porosity FTIR measurements polymers and organics calorimetry Science & Technology |
topic |
PVDF Processing Characterization Electroactive polymers Ferroelectrics films and coatings scanning electron microscopy microstructure porosity FTIR measurements polymers and organics calorimetry Science & Technology |
description |
Poly(vinylidene fluoride) (PVDF) has remarkable properties leading to electro-optics, electro-mechanical and biomedical applications. In particular its piezo- and pyroelectric properties provide possibilities for many technological applications. The semicrystalline nature of PVDF, combined with the occurrence of at least four crystalline phases implies a complicated physical microstructure. The most frequently described and important phase is the β. The piezo and pyro-electric properties mainly depend on this phase, so increasing the β phase content has always been a great concern. It is possible to obtain films in the β phase by solution but this material presents a high porosity leading to an opaque appearance and a decrease of the mechanical an electrical properties. In this work, porous films in the β phase were obtained directly from the solution at 600C. After applying pressure perpendicular to the surface of the film at elevated temperature, the pores in the original sample are eliminated. The changes on the morphology and crystallinity associated to the pressure applied to the samples were also studied. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006 2006-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/5162 |
url |
http://hdl.handle.net/1822/5162 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Journal of Non-Crystalline Solids". ISSN 0022-3093. 352 (2006) 0022-3093 10.1016/j.jnoncrysol.2006.02.052 http://www.elsevier.com/wps/find/ journaldescription.cws_home/505709/ description#description |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132481636532224 |