In-situ electrochemical synthesis of inorganic compounds for materials conservation: Assessment of their effects on the porous structure

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Show simple item record Gómez Villalba, Luz Stella Feijoo, Jorge Rabanal Jiménez, María Eugenia Fort, R. 2022-07-20T10:34:07Z 2022-07-20T10:34:07Z 2021-11-01
dc.identifier.bibliographicCitation Gomez-Villalba, L. S., Feijoo, J., Rabanal, M. E., & Fort, R. (2021). In-situ electrochemical synthesis of inorganic compounds for materials conservation: Assessment of their effects on the porous structure. In Ceramics International, 47(21), 30406–30424
dc.identifier.issn 0272-8842
dc.description.abstract This study refers to the application of in-situ electrochemical synthesis as an alternative method to improve the properties of porous materials against harmful external agents that deteriorate them. It is oriented to an understanding of the effects of crystallisation on the pore structure of different compounds commonly used in the restoration and conservation of porous materials (historical ceramics, building walls, sculptures, or biomedical applications). It analyses the microstructural, chemical details, and stability of the neo-formed phases that modify the pore network. The electrochemical synthesis was carried out at ambient temperature (20 °C), over high porous sandstone for crystallising Ca carbonate, Mg carbonate, Ca phosphate, and Ca oxalate compounds. Based on the neo-formed minerals, a comparison was made depending on their specific properties defining how they affected the pore structure. The characterisation included polarised light optical microscopy, environmental and field-emission scanning electron microscopy, digital image analysis, cathodoluminescence (CL-ESEM),energy-dispersive X-ray spectroscopy, and X-ray microdiffraction. Aragonite, hydromagnesite, hydroxyapatite, and whewellite were identified as the majority phases depending on the treatment. Phase transformation, dehydration, and dissolution-re-precipitation processes suggested different degrees of stability, including aragonite/calcite (CaCO3 treatment) and hydromagnesite/magnesite (MgCO3 treatment) transformations and simultaneous crystallisation of brushite/hydroxyapatite ((Ca3(PO4)2 treatment). Electrocrystallisation induced changes in inter-granular porosity, the development of secondary porosity inherent to the minerals, and differences in pore cementation depending on its mineralogy. Among the treatments, Mg carbonate reduced porosity most effectively, followed in descending order by calcium carbonate and calcium phosphate, being the calcium oxalate the less effective.
dc.description.sponsorship This work was funded by the following projects: TOP-HERITAGE- (Technologies in Heritage Sciences (S2018/NMT_4372, Community of Madrid); MULTIMAT CHALLENGE: Multifunctional Materials for Society Challenges (S2013/MIT-2862, Community of Madrid); Additive Manufacturing: from material to application, ADITIMAT-CM (S2018/ NMT-4411, Community of Madrid); MAT2016-80875-C3-3-R, (Spanish Ministry of Science, Innovation and Universities); Author J.F.‘s participation was supported by a Spanish Ministry of Sciences, Innovation and Universities Juan de la Cierva grant.
dc.format.extent 18
dc.language.iso eng
dc.publisher ELSEVIER BV
dc.rights © 2021 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other In-situ electrochemical synthesis
dc.subject.other Porous materials
dc.subject.other Pore-structure modification
dc.subject.other Aragonite
dc.subject.other Calcite
dc.subject.other Hydromagnesite
dc.subject.other Hydroxyapatite
dc.subject.other Whewellite
dc.title In-situ electrochemical synthesis of inorganic compounds for materials conservation: Assessment of their effects on the porous structure
dc.type research article
dc.subject.eciencia Materiales
dc.rights.accessRights open access
dc.relation.projectID Comunidad de Madrid. S2013/MIT-2862
dc.relation.projectID Gobierno de España. MAT2016-80875-C3-3-R
dc.relation.projectID Comunidad de Madrid. S2018/NMT-4411
dc.identifier.publicationfirstpage 30406
dc.identifier.publicationissue 21
dc.identifier.publicationlastpage 30424
dc.identifier.publicationtitle CERAMICS INTERNATIONAL
dc.identifier.publicationvolume 47
dc.identifier.uxxi AR/0000029400
dc.contributor.funder Comunidad de Madrid
dc.contributor.funder Ministerio de Ciencia, Innovación y Universidades (España)
dc.affiliation.dpto UC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Tecnología de Polvos
dc.type.hasVersion SMUR
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