Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/87909 |
Resumo: | Natural fibers form economic and environmentally friendly substitutes for synthetic fibers in civil engineering composites. However, natural fibers present flaws, irregular morphology and reduced durability in alkaline media. The present work reports the application of a new nanocomposite-based coating for flax and hemp fibers that enhances their mechanical properties and environmental resistance. The nanocomposite coating is based on graphene nanoplatelets (GNPs) and a waterborne polyurethane (WPU). Nanocomposites were prepared with pristine and surface modified GNPs, the latter obtained by polydopamine self-polymerization, tailoring the surface chemistry for strong interfaces with polyurethane. The coated fibers demonstrate enhanced tensile properties and low water absorption. Hemp yarns present 120% and 163% increases in tensile strength and elastic modulus, respectively, compared to the as-received yarns. The yarn properties achieved are adequate for their application as reinforcement of brittle and hydrophilic matrices such as lime, thus setting a new milestone in natural fiber composites manufacturing. |
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Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofittingA-Natural fibersA-GrapheneD-Mechanical testingE-Surface treatmentsNatural fibers form economic and environmentally friendly substitutes for synthetic fibers in civil engineering composites. However, natural fibers present flaws, irregular morphology and reduced durability in alkaline media. The present work reports the application of a new nanocomposite-based coating for flax and hemp fibers that enhances their mechanical properties and environmental resistance. The nanocomposite coating is based on graphene nanoplatelets (GNPs) and a waterborne polyurethane (WPU). Nanocomposites were prepared with pristine and surface modified GNPs, the latter obtained by polydopamine self-polymerization, tailoring the surface chemistry for strong interfaces with polyurethane. The coated fibers demonstrate enhanced tensile properties and low water absorption. Hemp yarns present 120% and 163% increases in tensile strength and elastic modulus, respectively, compared to the as-received yarns. The yarn properties achieved are adequate for their application as reinforcement of brittle and hydrophilic matrices such as lime, thus setting a new milestone in natural fiber composites manufacturing.FCT -Fundação para a Ciência e a Tecnologia(POCI-01-0145-FEDER-007633)ElsevierUniversidade do MinhoAbbass, AliPaiva, Maria C.Oliveira, Daniel V.Lourenço, Paulo B.Fangueiro, Raúl20232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/87909engAbbass, A., Paiva, M. C., Oliveira, D. V., Lourenço, P. B., & Fangueiro, R. (2023, March). Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting. Composites Part A: Applied Science and Manufacturing. Elsevier BV. http://doi.org/10.1016/j.compositesa.2022.1073791359-835X10.1016/j.compositesa.2022.107379https://doi.org/10.1016/j.compositesa.2022.107379info: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:RCAAP2024-01-06T01:29:26Zoai:repositorium.sdum.uminho.pt:1822/87909Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:30:26.173968Repositório 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 |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
title |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
spellingShingle |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting Abbass, Ali A-Natural fibers A-Graphene D-Mechanical testing E-Surface treatments |
title_short |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
title_full |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
title_fullStr |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
title_full_unstemmed |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
title_sort |
Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
author |
Abbass, Ali |
author_facet |
Abbass, Ali Paiva, Maria C. Oliveira, Daniel V. Lourenço, Paulo B. Fangueiro, Raúl |
author_role |
author |
author2 |
Paiva, Maria C. Oliveira, Daniel V. Lourenço, Paulo B. Fangueiro, Raúl |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Abbass, Ali Paiva, Maria C. Oliveira, Daniel V. Lourenço, Paulo B. Fangueiro, Raúl |
dc.subject.por.fl_str_mv |
A-Natural fibers A-Graphene D-Mechanical testing E-Surface treatments |
topic |
A-Natural fibers A-Graphene D-Mechanical testing E-Surface treatments |
description |
Natural fibers form economic and environmentally friendly substitutes for synthetic fibers in civil engineering composites. However, natural fibers present flaws, irregular morphology and reduced durability in alkaline media. The present work reports the application of a new nanocomposite-based coating for flax and hemp fibers that enhances their mechanical properties and environmental resistance. The nanocomposite coating is based on graphene nanoplatelets (GNPs) and a waterborne polyurethane (WPU). Nanocomposites were prepared with pristine and surface modified GNPs, the latter obtained by polydopamine self-polymerization, tailoring the surface chemistry for strong interfaces with polyurethane. The coated fibers demonstrate enhanced tensile properties and low water absorption. Hemp yarns present 120% and 163% increases in tensile strength and elastic modulus, respectively, compared to the as-received yarns. The yarn properties achieved are adequate for their application as reinforcement of brittle and hydrophilic matrices such as lime, thus setting a new milestone in natural fiber composites manufacturing. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023 2023-01-01T00:00:00Z |
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 |
https://hdl.handle.net/1822/87909 |
url |
https://hdl.handle.net/1822/87909 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Abbass, A., Paiva, M. C., Oliveira, D. V., Lourenço, P. B., & Fangueiro, R. (2023, March). Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting. Composites Part A: Applied Science and Manufacturing. Elsevier BV. http://doi.org/10.1016/j.compositesa.2022.107379 1359-835X 10.1016/j.compositesa.2022.107379 https://doi.org/10.1016/j.compositesa.2022.107379 |
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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1799136786251776000 |