Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties

Detalhes bibliográficos
Autor(a) principal: Cunha, Eunice
Data de Publicação: 2019
Outros Autores: Paiva, M. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/60870
Resumo: Graphene has excellent mechanical, thermal, and electrical properties. Graphene can serve as potential reinforcement in polymer-based nanocomposites. In order to achieve this goal, graphene has to be distributed homogeneously and dispersed throughout the polymer matrix, establishing a strong interface with the polymer. Solution mixing is an interesting method for the preparation of homogeneous nanocomposites, in particular when using environmentally friendly solvents such as water. The major difficulty met in the production of graphene/polymer composites concerns the preparation and stabilization of graphene in aqueous suspension. In the present work three different graphite-based materials, with different crystallinity and purity grades, were exfoliated in aqueous solution of an amphiphilic pyrene derivative, forming few-layer graphene (FLG). The FLG prepared was dispersed in waterborne polyurethane (WPU) to produce composite films. The composite films were produced by solvent casting and spray coating, forming free-standing films that were characterized in terms of its distribution of FLG through the composite, its permeability to water vapor, its electrical resistivity, and its mechanical properties. The studies demonstrated the influence of different factors on the composite film properties such as the use of graphite vs. FLG, the FLG lateral dimensions, and the FLG composition and composite preparation method.
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spelling Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical propertiesfew-layer graphenewaterborne polyurethanecompositestensile propertieselectrical conductivitybarrier propertiesScience & TechnologyGraphene has excellent mechanical, thermal, and electrical properties. Graphene can serve as potential reinforcement in polymer-based nanocomposites. In order to achieve this goal, graphene has to be distributed homogeneously and dispersed throughout the polymer matrix, establishing a strong interface with the polymer. Solution mixing is an interesting method for the preparation of homogeneous nanocomposites, in particular when using environmentally friendly solvents such as water. The major difficulty met in the production of graphene/polymer composites concerns the preparation and stabilization of graphene in aqueous suspension. In the present work three different graphite-based materials, with different crystallinity and purity grades, were exfoliated in aqueous solution of an amphiphilic pyrene derivative, forming few-layer graphene (FLG). The FLG prepared was dispersed in waterborne polyurethane (WPU) to produce composite films. The composite films were produced by solvent casting and spray coating, forming free-standing films that were characterized in terms of its distribution of FLG through the composite, its permeability to water vapor, its electrical resistivity, and its mechanical properties. The studies demonstrated the influence of different factors on the composite film properties such as the use of graphite vs. FLG, the FLG lateral dimensions, and the FLG composition and composite preparation method.This work was funded by National Funds through the FCT—Portuguese Foundation for Science and Technology, Reference UID/CTM/50025/2013, and FEDER funds through the COMPETE 2020 Program under the project number POCI-01-0145-FEDER-007688. EC acknowledges the PhD grant SFRH/BD/87214/2012.info:eu-repo/semantics/publishedVersionMultidisciplinary Digital Publishing InstituteUniversidade do MinhoCunha, EunicePaiva, M. C.2019-04-032019-04-03T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/60870eng2504-477X10.3390/jcs3020035info: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:RCAAP2023-07-21T12:34:28Zoai:repositorium.sdum.uminho.pt:1822/60870Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:30:10.292439Repositório 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 Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
title Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
spellingShingle Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
Cunha, Eunice
few-layer graphene
waterborne polyurethane
composites
tensile properties
electrical conductivity
barrier properties
Science & Technology
title_short Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
title_full Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
title_fullStr Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
title_full_unstemmed Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
title_sort Composite films of waterborne polyurethane and few-layer graphene-enhancing barrier, mechanical, and electrical properties
author Cunha, Eunice
author_facet Cunha, Eunice
Paiva, M. C.
author_role author
author2 Paiva, M. C.
author2_role author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Cunha, Eunice
Paiva, M. C.
dc.subject.por.fl_str_mv few-layer graphene
waterborne polyurethane
composites
tensile properties
electrical conductivity
barrier properties
Science & Technology
topic few-layer graphene
waterborne polyurethane
composites
tensile properties
electrical conductivity
barrier properties
Science & Technology
description Graphene has excellent mechanical, thermal, and electrical properties. Graphene can serve as potential reinforcement in polymer-based nanocomposites. In order to achieve this goal, graphene has to be distributed homogeneously and dispersed throughout the polymer matrix, establishing a strong interface with the polymer. Solution mixing is an interesting method for the preparation of homogeneous nanocomposites, in particular when using environmentally friendly solvents such as water. The major difficulty met in the production of graphene/polymer composites concerns the preparation and stabilization of graphene in aqueous suspension. In the present work three different graphite-based materials, with different crystallinity and purity grades, were exfoliated in aqueous solution of an amphiphilic pyrene derivative, forming few-layer graphene (FLG). The FLG prepared was dispersed in waterborne polyurethane (WPU) to produce composite films. The composite films were produced by solvent casting and spray coating, forming free-standing films that were characterized in terms of its distribution of FLG through the composite, its permeability to water vapor, its electrical resistivity, and its mechanical properties. The studies demonstrated the influence of different factors on the composite film properties such as the use of graphite vs. FLG, the FLG lateral dimensions, and the FLG composition and composite preparation method.
publishDate 2019
dc.date.none.fl_str_mv 2019-04-03
2019-04-03T00:00:00Z
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/1822/60870
url http://hdl.handle.net/1822/60870
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2504-477X
10.3390/jcs3020035
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
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
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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
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