Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment
Autor(a) principal: | |
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Data de Publicação: | 2022 |
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/1822/80451 |
Resumo: | Carbonation and corrosion of reinforced concrete structures (RCS) are the two main phenomena that more often affect civil engineering structures. The main consequence of carbonation is the pH reduction of concrete to values between 9 and 6 which may compromise the RCS durability. Thus, the development of sensors that would predict concrete carbonation is of utmost importance. Fiber optic sensors (OFS) are commonly used for concrete applications due to their high sensitivity and resistance to external interference. This work reports the synthesis of organic-inorganic hybrid (OIH) materials for possible functionalization of OFS and application in concrete and RCS. As precursors, 3-glycidyloxypropyltrimethoxysilane (GPTMS) and Jeffamine® THF-170 were used. The OIH sol-gel materials were doped with phenolphthalein (phph) for pH sensing proposes and cetyl trimethyl ammonium bromide (CTAB) as surfactant. OIH with pH sensing ability properties were successfully obtained and the doping of the OIH matrix did not significantly changed the dielectric properties of the resultant material. Moreover, the results obtained in simulated concrete pore solutions, obtained for the OIH produced, showed to be promising for application in fresh concrete. The transmittance of the synthesized OIH materials decreased after the doping. The matrix shows intrinsic fluorescence and doping it only led to small deviations in the wavelength of the peak of maximum emission. No significative changes were obtained on the thermal profile of the OIHs. The pH variation was shown by the OIH material color change. Stability studies regarding the release of phph from the OIH matrix indicates that the proposed system reveals long-term stability. |
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Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environmentsol-gelorganic-inorganic hybridsphenolphthaleinmembranessensorspHCiências Naturais::Ciências QuímicasScience & TechnologyCidades e comunidades sustentáveisCarbonation and corrosion of reinforced concrete structures (RCS) are the two main phenomena that more often affect civil engineering structures. The main consequence of carbonation is the pH reduction of concrete to values between 9 and 6 which may compromise the RCS durability. Thus, the development of sensors that would predict concrete carbonation is of utmost importance. Fiber optic sensors (OFS) are commonly used for concrete applications due to their high sensitivity and resistance to external interference. This work reports the synthesis of organic-inorganic hybrid (OIH) materials for possible functionalization of OFS and application in concrete and RCS. As precursors, 3-glycidyloxypropyltrimethoxysilane (GPTMS) and Jeffamine® THF-170 were used. The OIH sol-gel materials were doped with phenolphthalein (phph) for pH sensing proposes and cetyl trimethyl ammonium bromide (CTAB) as surfactant. OIH with pH sensing ability properties were successfully obtained and the doping of the OIH matrix did not significantly changed the dielectric properties of the resultant material. Moreover, the results obtained in simulated concrete pore solutions, obtained for the OIH produced, showed to be promising for application in fresh concrete. The transmittance of the synthesized OIH materials decreased after the doping. The matrix shows intrinsic fluorescence and doping it only led to small deviations in the wavelength of the peak of maximum emission. No significative changes were obtained on the thermal profile of the OIHs. The pH variation was shown by the OIH material color change. Stability studies regarding the release of phph from the OIH matrix indicates that the proposed system reveals long-term stability.Thanks are due to Fundaçã para a Ciência e Tecnologia (FCT) and FEDER (European Fund for Regional Development)-COMPETE-QRENEU for financial support through the Chemistry Research Centre of the University of Minho (Ref. CQ/UM (UID/QUI/00686/2019 and UID/QUI/00686/2020)), project “SolSensors — Development of Advanced Fiber Optic Sensors for Monitoring the Durability of Concrete Struc tures”, reference POCI-01-0145-FEDER-031220, a PhD grant to R. P. C. L. Sousa (SFRH/BD/145639/2019), a BSc grant to B. Ferreira and a Scientific Initiation grant to S. Sousa under the SolSensors project POCI 01-0145-FEDER-031220 is also acknowledged. Artur J. M. Valen tethanks the Coimbra Chemistry Centre and FCT for financial support (UID/QUI/00686/2020, UID/QUI/00313/2020).ElsevierUniversidade do MinhoFerreira, BárbaraSousa, SaraSousa, R. P. C. L.Costa, Susana P. G.Raposo, M. Manuela M.Parpot, PierValente, Artur J. M.Pereira, Rui F. P.Figueira, Rita Bacelar20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documenthttps://hdl.handle.net/1822/80451engFerreira, B., Sousa, S., Sousa, R. P. C. L., Costa, S. P. G., Raposo, M. M. M., Parpot, P., … Figueira, R. B. (2022, December). Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment. Construction and Building Materials. Elsevier BV. http://doi.org/10.1016/j.conbuildmat.2022.1294930950-061810.1016/j.conbuildmat.2022.129493129493https://doi.org/10.1016/j.conbuildmat.2022.129493info: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:RCAAP2023-07-21T12:38:25ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment |
title |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment |
spellingShingle |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment Ferreira, Bárbara sol-gel organic-inorganic hybrids phenolphthalein membranes sensors pH Ciências Naturais::Ciências Químicas Science & Technology Cidades e comunidades sustentáveis |
title_short |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment |
title_full |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment |
title_fullStr |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment |
title_full_unstemmed |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment |
title_sort |
Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment |
author |
Ferreira, Bárbara |
author_facet |
Ferreira, Bárbara Sousa, Sara Sousa, R. P. C. L. Costa, Susana P. G. Raposo, M. Manuela M. Parpot, Pier Valente, Artur J. M. Pereira, Rui F. P. Figueira, Rita Bacelar |
author_role |
author |
author2 |
Sousa, Sara Sousa, R. P. C. L. Costa, Susana P. G. Raposo, M. Manuela M. Parpot, Pier Valente, Artur J. M. Pereira, Rui F. P. Figueira, Rita Bacelar |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ferreira, Bárbara Sousa, Sara Sousa, R. P. C. L. Costa, Susana P. G. Raposo, M. Manuela M. Parpot, Pier Valente, Artur J. M. Pereira, Rui F. P. Figueira, Rita Bacelar |
dc.subject.por.fl_str_mv |
sol-gel organic-inorganic hybrids phenolphthalein membranes sensors pH Ciências Naturais::Ciências Químicas Science & Technology Cidades e comunidades sustentáveis |
topic |
sol-gel organic-inorganic hybrids phenolphthalein membranes sensors pH Ciências Naturais::Ciências Químicas Science & Technology Cidades e comunidades sustentáveis |
description |
Carbonation and corrosion of reinforced concrete structures (RCS) are the two main phenomena that more often affect civil engineering structures. The main consequence of carbonation is the pH reduction of concrete to values between 9 and 6 which may compromise the RCS durability. Thus, the development of sensors that would predict concrete carbonation is of utmost importance. Fiber optic sensors (OFS) are commonly used for concrete applications due to their high sensitivity and resistance to external interference. This work reports the synthesis of organic-inorganic hybrid (OIH) materials for possible functionalization of OFS and application in concrete and RCS. As precursors, 3-glycidyloxypropyltrimethoxysilane (GPTMS) and Jeffamine® THF-170 were used. The OIH sol-gel materials were doped with phenolphthalein (phph) for pH sensing proposes and cetyl trimethyl ammonium bromide (CTAB) as surfactant. OIH with pH sensing ability properties were successfully obtained and the doping of the OIH matrix did not significantly changed the dielectric properties of the resultant material. Moreover, the results obtained in simulated concrete pore solutions, obtained for the OIH produced, showed to be promising for application in fresh concrete. The transmittance of the synthesized OIH materials decreased after the doping. The matrix shows intrinsic fluorescence and doping it only led to small deviations in the wavelength of the peak of maximum emission. No significative changes were obtained on the thermal profile of the OIHs. The pH variation was shown by the OIH material color change. Stability studies regarding the release of phph from the OIH matrix indicates that the proposed system reveals long-term stability. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022 2022-01-01T00:00:00Z |
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/1822/80451 |
url |
https://hdl.handle.net/1822/80451 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ferreira, B., Sousa, S., Sousa, R. P. C. L., Costa, S. P. G., Raposo, M. M. M., Parpot, P., … Figueira, R. B. (2022, December). Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment. Construction and Building Materials. Elsevier BV. http://doi.org/10.1016/j.conbuildmat.2022.129493 0950-0618 10.1016/j.conbuildmat.2022.129493 129493 https://doi.org/10.1016/j.conbuildmat.2022.129493 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/vnd.openxmlformats-officedocument.wordprocessingml.document |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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