Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures
Autor(a) principal: | |
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Data de Publicação: | 2024 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.14/43825 |
Resumo: | Outdoor stone sculptures are prone to accelerated deterioration caused by the proliferation of microorganisms in the stone. The physical, chemical and mechanical action of microorganisms on stone heritage causes aesthetic and structural changes that devalue the artworks over time. Developing more sustainable and ecological alternatives for their preventive conservation is necessary to reduce the negative environmental and human health impacts of currently used toxic biocides. Chitosan-based coatings cross-linked with citric acid and sodium tripolyphosphate (TPP) were developed for application to stone sculptures, as antimicrobial protection to inhibit the growth of degrading microorganisms. After polymerisation of the formulations, the resulting films were only partially soluble while remaining permeable to water vapour. These characteristics offer the possibility to reverse the conservation treatments, or to re-treat in regular periods, as part of programmed conservation strategies. Bacteria and fungi commonly found in stone microbiomes that contribute to biodeterioration processes were inhibited, particularly the pigment-producing yeast Rhodotorula spp., which causes discolouration of stone surfaces. The most interesting coating was successfully tested on granite, limestone and marble samples, and its presence on the stones' surfaces was confirmed by FTIR and SEM analyses. The chitosan-based coating caused no visible colour changes to the stones and reduced the wettability of granite and limestone, thus representing a potential antimicrobial protective layer for stone cultural heritage. |
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Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculpturesChitosanCoatingStoneSculptureCultural heritageOutdoor stone sculptures are prone to accelerated deterioration caused by the proliferation of microorganisms in the stone. The physical, chemical and mechanical action of microorganisms on stone heritage causes aesthetic and structural changes that devalue the artworks over time. Developing more sustainable and ecological alternatives for their preventive conservation is necessary to reduce the negative environmental and human health impacts of currently used toxic biocides. Chitosan-based coatings cross-linked with citric acid and sodium tripolyphosphate (TPP) were developed for application to stone sculptures, as antimicrobial protection to inhibit the growth of degrading microorganisms. After polymerisation of the formulations, the resulting films were only partially soluble while remaining permeable to water vapour. These characteristics offer the possibility to reverse the conservation treatments, or to re-treat in regular periods, as part of programmed conservation strategies. Bacteria and fungi commonly found in stone microbiomes that contribute to biodeterioration processes were inhibited, particularly the pigment-producing yeast Rhodotorula spp., which causes discolouration of stone surfaces. The most interesting coating was successfully tested on granite, limestone and marble samples, and its presence on the stones' surfaces was confirmed by FTIR and SEM analyses. The chitosan-based coating caused no visible colour changes to the stones and reduced the wettability of granite and limestone, thus representing a potential antimicrobial protective layer for stone cultural heritage.Veritati - Repositório Institucional da Universidade Católica PortuguesaSilva, Nádia C.Castro, DianaNeto, CláudiaMadureira, Ana RaquelPintado, ManuelaMoreira, Patrícia R.2024-02-05T10:34:00Z2024-042024-04-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.14/43825eng0300-944010.1016/j.porgcoat.2024.10824685183982244info: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:RCAAP2024-02-20T01:32:35Zoai:repositorio.ucp.pt:10400.14/43825Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:13:51.155179Repositório 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 |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures |
title |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures |
spellingShingle |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures Silva, Nádia C. Chitosan Coating Stone Sculpture Cultural heritage |
title_short |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures |
title_full |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures |
title_fullStr |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures |
title_full_unstemmed |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures |
title_sort |
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioration of outdoor stone sculptures |
author |
Silva, Nádia C. |
author_facet |
Silva, Nádia C. Castro, Diana Neto, Cláudia Madureira, Ana Raquel Pintado, Manuela Moreira, Patrícia R. |
author_role |
author |
author2 |
Castro, Diana Neto, Cláudia Madureira, Ana Raquel Pintado, Manuela Moreira, Patrícia R. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Veritati - Repositório Institucional da Universidade Católica Portuguesa |
dc.contributor.author.fl_str_mv |
Silva, Nádia C. Castro, Diana Neto, Cláudia Madureira, Ana Raquel Pintado, Manuela Moreira, Patrícia R. |
dc.subject.por.fl_str_mv |
Chitosan Coating Stone Sculpture Cultural heritage |
topic |
Chitosan Coating Stone Sculpture Cultural heritage |
description |
Outdoor stone sculptures are prone to accelerated deterioration caused by the proliferation of microorganisms in the stone. The physical, chemical and mechanical action of microorganisms on stone heritage causes aesthetic and structural changes that devalue the artworks over time. Developing more sustainable and ecological alternatives for their preventive conservation is necessary to reduce the negative environmental and human health impacts of currently used toxic biocides. Chitosan-based coatings cross-linked with citric acid and sodium tripolyphosphate (TPP) were developed for application to stone sculptures, as antimicrobial protection to inhibit the growth of degrading microorganisms. After polymerisation of the formulations, the resulting films were only partially soluble while remaining permeable to water vapour. These characteristics offer the possibility to reverse the conservation treatments, or to re-treat in regular periods, as part of programmed conservation strategies. Bacteria and fungi commonly found in stone microbiomes that contribute to biodeterioration processes were inhibited, particularly the pigment-producing yeast Rhodotorula spp., which causes discolouration of stone surfaces. The most interesting coating was successfully tested on granite, limestone and marble samples, and its presence on the stones' surfaces was confirmed by FTIR and SEM analyses. The chitosan-based coating caused no visible colour changes to the stones and reduced the wettability of granite and limestone, thus representing a potential antimicrobial protective layer for stone cultural heritage. |
publishDate |
2024 |
dc.date.none.fl_str_mv |
2024-02-05T10:34:00Z 2024-04 2024-04-01T00:00:00Z |
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/10400.14/43825 |
url |
http://hdl.handle.net/10400.14/43825 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0300-9440 10.1016/j.porgcoat.2024.108246 85183982244 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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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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1799137240936349696 |