Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation

Detalhes bibliográficos
Autor(a) principal: Abbass, Ali
Data de Publicação: 2021
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: http://hdl.handle.net/1822/74764
Resumo: This paper presents an optimized washing protocol for as-received natural fibers, prior to large-scale composite manufacturing, for the structural strengthening of historic masonry. The aim was to achieve a simple protocol for standard cleaning of fiber surfaces from low molecular weight constituents that may be detrimental towards interfacial strength without damaging the fibers. The proposed procedure employs the application of the solvent sequence: ethanol, acetone, hexane, with optimized incubation times and stirring conditions. Additionally, this procedure may change the surface of the fiber, thereby enhancing the durability of the fiber-matrix interface. The washing protocol resulted in an increase of tensile strength by 56%, 52% and 22% for flax, hemp and sisal fibers, respectively, as compared to the corresponding non-washed fibers, without loss of elongation. The static contact angle measurements confirmed exposure of a higher fraction of the hydrophilic crystalline cellulose, with a higher wettability observed after washing protocols.
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spelling Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluationBuilt heritageMasonryNatural fibersNTRMSurface modificationFTIRContact angleTensile testArchimedesScience & TechnologyThis paper presents an optimized washing protocol for as-received natural fibers, prior to large-scale composite manufacturing, for the structural strengthening of historic masonry. The aim was to achieve a simple protocol for standard cleaning of fiber surfaces from low molecular weight constituents that may be detrimental towards interfacial strength without damaging the fibers. The proposed procedure employs the application of the solvent sequence: ethanol, acetone, hexane, with optimized incubation times and stirring conditions. Additionally, this procedure may change the surface of the fiber, thereby enhancing the durability of the fiber-matrix interface. The washing protocol resulted in an increase of tensile strength by 56%, 52% and 22% for flax, hemp and sisal fibers, respectively, as compared to the corresponding non-washed fibers, without loss of elongation. The static contact angle measurements confirmed exposure of a higher fraction of the hydrophilic crystalline cellulose, with a higher wettability observed after washing protocols.This work was partly financed by the Portuguese Foundation for Science and Technology (FCT/MCTES) through national funds (PIDDAC) under the R&D Unit Institute for Sustainability and Innovation in Structural Engineering (ISISE) under reference UIDB/04029/2020. IPC acknowledges the support of FCT through National Funds References UIDB/05256/2020 and UIDP/05256/2020. The authors wish to acknowledge FCT for the PhD scholarship granted to the first author (SFRH/BD/144106/2019).Multidisciplinary Digital Publishing Institute (MDPI)Universidade do MinhoAbbass, AliPaiva, Maria C.Oliveira, Daniel V.Lourenço, Paulo B.Fangueiro, Raúl2021-09-012021-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/74764engAbbass, A.; Paiva, M.C.; Oliveira, D.V.; Lourenço, P.B.; Fangueiro, R. Insight into the Effects of Solvent Treatment of Natural Fibers Prior to Structural Composite Casting: Chemical, Physical and Mechanical Evaluation. Fibers 2021, 9, 54. https://doi.org/10.3390/fib90900542079-643910.3390/fib9090054https://www.mdpi.com/2079-6439/9/9/54info: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:RCAAP2023-07-21T12:02:43Zoai:repositorium.sdum.uminho.pt:1822/74764Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:52:46.333980Repositório 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 Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
title Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
spellingShingle Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
Abbass, Ali
Built heritage
Masonry
Natural fibers
NTRM
Surface modification
FTIR
Contact angle
Tensile test
Archimedes
Science & Technology
title_short Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
title_full Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
title_fullStr Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
title_full_unstemmed Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
title_sort Insight into the effects of solvent treatment of natural fibers prior to structural composite casting: chemical, physical and mechanical evaluation
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 Built heritage
Masonry
Natural fibers
NTRM
Surface modification
FTIR
Contact angle
Tensile test
Archimedes
Science & Technology
topic Built heritage
Masonry
Natural fibers
NTRM
Surface modification
FTIR
Contact angle
Tensile test
Archimedes
Science & Technology
description This paper presents an optimized washing protocol for as-received natural fibers, prior to large-scale composite manufacturing, for the structural strengthening of historic masonry. The aim was to achieve a simple protocol for standard cleaning of fiber surfaces from low molecular weight constituents that may be detrimental towards interfacial strength without damaging the fibers. The proposed procedure employs the application of the solvent sequence: ethanol, acetone, hexane, with optimized incubation times and stirring conditions. Additionally, this procedure may change the surface of the fiber, thereby enhancing the durability of the fiber-matrix interface. The washing protocol resulted in an increase of tensile strength by 56%, 52% and 22% for flax, hemp and sisal fibers, respectively, as compared to the corresponding non-washed fibers, without loss of elongation. The static contact angle measurements confirmed exposure of a higher fraction of the hydrophilic crystalline cellulose, with a higher wettability observed after washing protocols.
publishDate 2021
dc.date.none.fl_str_mv 2021-09-01
2021-09-01T00:00:00Z
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/1822/74764
url http://hdl.handle.net/1822/74764
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. Insight into the Effects of Solvent Treatment of Natural Fibers Prior to Structural Composite Casting: Chemical, Physical and Mechanical Evaluation. Fibers 2021, 9, 54. https://doi.org/10.3390/fib9090054
2079-6439
10.3390/fib9090054
https://www.mdpi.com/2079-6439/9/9/54
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 Multidisciplinary Digital Publishing Institute (MDPI)
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
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
_version_ 1799132304553017344

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