Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting

Detalhes bibliográficos
Autor(a) principal: Abbass, Ali
Data de Publicação: 2023
Outros Autores: Paiva, Maria C., Oliveira, Daniel V., Lourenço, Paulo B., Fangueiro, Raúl
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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spelling 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
instname_str 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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