Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation

Detalhes bibliográficos
Autor(a) principal: Galacho, Cristina
Data de Publicação: 2017
Outros Autores: Girginova, P.I., Candeias, António, Mirão, José, Veiga, R, Santos, A.S.
Tipo de documento: Artigo de conferência
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/22376
Resumo: Wall renders are subject of constant aging and deterioration and they therefore need repair and treatment. The polymers used in the past for consolidation show many drawbacks and often accelerate the deterioration. This implies the need of new non-toxic materials, preferably of the same composition as the original art work, compatible, with long-term efficiency, without side effect, easy for application. Different inorganic materials have been proposed. The lime-based materials are convenient but not efficient enough, so that different approaches to enhance their efficiency must be found. Nanomaterials exhibit distinct properties when compared to their bulk analogues and have been seen as a good alternative of compatible materials for long term preservation [1]. In this context our research intends to study and optimize successful preparative strategies of micro- and nanolimes, and to improve their efficiency in the inhibition of the degradation process and in the consolidation of wall renders and stone [2,3]. The work is focused on the innovation of the tradition lime materials towards long-term efficiency and compatibility with the surfaces of original works, taking into account environmental and human risk factors. In this communication we report the synthesis and characterization of micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation. We discuss synthetic strategies applied and optimum preparative conditions, such as temperature, synthesis duration, addition of surfactant and others, in order to obtain well defined functional magnesium and calcium hydroxides nanoparticles. The composition, morphology and crystallinity are analysed mainly by microscopical techniques and by X-ray powder diffraction. Additional structural and chemical data are collected with other common techniques: Energy Dispersive X-Ray Spectrometry, micro-FTIR, micro-Raman, simultaneous thermal analysis (TGA/DTA) among others, when needed. We also discuss the laboratory tests conducted to assess the efficiency of the nanolimes on mortar specimens (porosity, dynamic elastic modulus, compressive and flexural mechanical behaviour) and the feasibility of their application. References: [1] Baglioni P., Carretti E., Chelazzi D., Nature Nanotechnology 10, Apr 2015, 287-290. [2] Girginova, P.I.; Galacho, C.; Mirão, J.; Veiga, R.; Silva, A.S.; Candeias, A., Conservar património 23, 2016, 103-107. [3] Borsoi, G.; Lubellia, B.; van Hees, R.; Veiga, R.; Silva, A.S.; J. Cult Herit. 18, 2016, 242.
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spelling Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservationmotarsmicro- and nanolimesconsolidationXRDSEM-EDSWall renders are subject of constant aging and deterioration and they therefore need repair and treatment. The polymers used in the past for consolidation show many drawbacks and often accelerate the deterioration. This implies the need of new non-toxic materials, preferably of the same composition as the original art work, compatible, with long-term efficiency, without side effect, easy for application. Different inorganic materials have been proposed. The lime-based materials are convenient but not efficient enough, so that different approaches to enhance their efficiency must be found. Nanomaterials exhibit distinct properties when compared to their bulk analogues and have been seen as a good alternative of compatible materials for long term preservation [1]. In this context our research intends to study and optimize successful preparative strategies of micro- and nanolimes, and to improve their efficiency in the inhibition of the degradation process and in the consolidation of wall renders and stone [2,3]. The work is focused on the innovation of the tradition lime materials towards long-term efficiency and compatibility with the surfaces of original works, taking into account environmental and human risk factors. In this communication we report the synthesis and characterization of micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation. We discuss synthetic strategies applied and optimum preparative conditions, such as temperature, synthesis duration, addition of surfactant and others, in order to obtain well defined functional magnesium and calcium hydroxides nanoparticles. The composition, morphology and crystallinity are analysed mainly by microscopical techniques and by X-ray powder diffraction. Additional structural and chemical data are collected with other common techniques: Energy Dispersive X-Ray Spectrometry, micro-FTIR, micro-Raman, simultaneous thermal analysis (TGA/DTA) among others, when needed. We also discuss the laboratory tests conducted to assess the efficiency of the nanolimes on mortar specimens (porosity, dynamic elastic modulus, compressive and flexural mechanical behaviour) and the feasibility of their application. References: [1] Baglioni P., Carretti E., Chelazzi D., Nature Nanotechnology 10, Apr 2015, 287-290. [2] Girginova, P.I.; Galacho, C.; Mirão, J.; Veiga, R.; Silva, A.S.; Candeias, A., Conservar património 23, 2016, 103-107. [3] Borsoi, G.; Lubellia, B.; van Hees, R.; Veiga, R.; Silva, A.S.; J. Cult Herit. 18, 2016, 242.Programme and abracts of Technoheritage 2017, Miguel Angel Rogerio-Candelera, Maria J. Mosquera, M.L. Almoraima Gil (editors/publishers)2018-02-20T15:17:02Z2018-02-202017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/22376http://hdl.handle.net/10174/22376pornaonaosimpcg@uevora.ptpenka@uevora.ptcandeias@uevora.ptjmirao@uevora.ptrveiga@lnec.ptssilva@lnec.pt304Galacho, CristinaGirginova, P.I.Candeias, AntónioMirão, JoséVeiga, RSantos, A.S.info: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:RCAAP2024-01-03T19:13:45Zoai:dspace.uevora.pt:10174/22376Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:13:29.412637Repositório 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 Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
title Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
spellingShingle Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
Galacho, Cristina
motars
micro- and nanolimes
consolidation
XRD
SEM-EDS
title_short Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
title_full Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
title_fullStr Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
title_full_unstemmed Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
title_sort Micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation
author Galacho, Cristina
author_facet Galacho, Cristina
Girginova, P.I.
Candeias, António
Mirão, José
Veiga, R
Santos, A.S.
author_role author
author2 Girginova, P.I.
Candeias, António
Mirão, José
Veiga, R
Santos, A.S.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Galacho, Cristina
Girginova, P.I.
Candeias, António
Mirão, José
Veiga, R
Santos, A.S.
dc.subject.por.fl_str_mv motars
micro- and nanolimes
consolidation
XRD
SEM-EDS
topic motars
micro- and nanolimes
consolidation
XRD
SEM-EDS
description Wall renders are subject of constant aging and deterioration and they therefore need repair and treatment. The polymers used in the past for consolidation show many drawbacks and often accelerate the deterioration. This implies the need of new non-toxic materials, preferably of the same composition as the original art work, compatible, with long-term efficiency, without side effect, easy for application. Different inorganic materials have been proposed. The lime-based materials are convenient but not efficient enough, so that different approaches to enhance their efficiency must be found. Nanomaterials exhibit distinct properties when compared to their bulk analogues and have been seen as a good alternative of compatible materials for long term preservation [1]. In this context our research intends to study and optimize successful preparative strategies of micro- and nanolimes, and to improve their efficiency in the inhibition of the degradation process and in the consolidation of wall renders and stone [2,3]. The work is focused on the innovation of the tradition lime materials towards long-term efficiency and compatibility with the surfaces of original works, taking into account environmental and human risk factors. In this communication we report the synthesis and characterization of micro- and nanoparticles based on alkali-earth metal hydroxides for cultural heritage conservation. We discuss synthetic strategies applied and optimum preparative conditions, such as temperature, synthesis duration, addition of surfactant and others, in order to obtain well defined functional magnesium and calcium hydroxides nanoparticles. The composition, morphology and crystallinity are analysed mainly by microscopical techniques and by X-ray powder diffraction. Additional structural and chemical data are collected with other common techniques: Energy Dispersive X-Ray Spectrometry, micro-FTIR, micro-Raman, simultaneous thermal analysis (TGA/DTA) among others, when needed. We also discuss the laboratory tests conducted to assess the efficiency of the nanolimes on mortar specimens (porosity, dynamic elastic modulus, compressive and flexural mechanical behaviour) and the feasibility of their application. References: [1] Baglioni P., Carretti E., Chelazzi D., Nature Nanotechnology 10, Apr 2015, 287-290. [2] Girginova, P.I.; Galacho, C.; Mirão, J.; Veiga, R.; Silva, A.S.; Candeias, A., Conservar património 23, 2016, 103-107. [3] Borsoi, G.; Lubellia, B.; van Hees, R.; Veiga, R.; Silva, A.S.; J. Cult Herit. 18, 2016, 242.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01T00:00:00Z
2018-02-20T15:17:02Z
2018-02-20
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/22376
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url http://hdl.handle.net/10174/22376
dc.language.iso.fl_str_mv por
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pcg@uevora.pt
penka@uevora.pt
candeias@uevora.pt
jmirao@uevora.pt
rveiga@lnec.pt
ssilva@lnec.pt
304
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Programme and abracts of Technoheritage 2017, Miguel Angel Rogerio-Candelera, Maria J. Mosquera, M.L. Almoraima Gil (editors/publishers)
publisher.none.fl_str_mv Programme and abracts of Technoheritage 2017, Miguel Angel Rogerio-Candelera, Maria J. Mosquera, M.L. Almoraima Gil (editors/publishers)
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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