Mostra el registre d'ítem simple

dc.contributor.authorGimeno Torrente, Domingo
dc.contributor.authorVallcorba, Oriol
dc.contributor.authorNavarro Ezquerra, Antonia
dc.contributor.authorAragoni, M. Carla
dc.contributor.authorGiacopetti, Laura
dc.contributor.authorArca, Massimiliano
dc.contributor.authorCarcangiu, Gianfranco
dc.contributor.authorColumbu, Stefano
dc.contributor.authorIsaia, Francesco
dc.contributor.authorLippolis, Vito
dc.contributor.authorMeloni, Paola
dc.contributor.authorPodda, Enrico
dc.contributor.authorRius Palleiro, Jordi
dc.contributor.authorPintus, Anna
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Tecnologia de l'Arquitectura
dc.date.accessioned2021-02-18T12:30:44Z
dc.date.available2021-02-18T12:30:44Z
dc.date.issued2021
dc.identifier.citationGimeno, D. [et al.]. Ammonium monoethyloxalate (AmEtOx): a new agent for the conservation of carbonate stone substrates. "New journal of chemistry", 2021,
dc.identifier.issn1144-0546
dc.identifier.urihttp://hdl.handle.net/2117/340096
dc.description.abstractThe ammonium salt of monoethyloxalate (AmEtOx) was investigated as a novel precursor for the conservation of carbonate stone substrates, such as biomicritic limestone and marble. Full characterization of treated and untreated authentic stone samples was carried out by means of SEM, X-ray powder diffraction, synchrotron tts-µXRD measurements, mercury intrusion porosimetry, determination of water transport properties, and pull-off tests. The improved solubility (1.49 M, 20.1% w/w) of AmEtOx as compared to that of ammonium oxalate (AmOx; 0.4 M, 5% w/w) results in the formation of microcrystalline phases 30–50 and 200–500 µm thick of calcium oxalate mono-(whewellite) or dihydrate (weddellite), on marble and biomicrite samples, respectively, after treatment with AmEtOx 5% and 12% w/w aqueous solutions. As a result, a reduction in the porosity of the stone samples and an enhancement of their cohesion are observed. DFT calculations, carried out to investigate the hydrolysis reaction leading from AmEtOx to AmOx, showed that the localization of the Lowest Unoccupied Molecular Orbital (LUMO) and the natural charge distribution account nicely for the tendency to hydrolyse observed experimentally, eventually leading to the formation of whewellite and weddellite on the stone surface.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Arquitectura::Restauració arquitectònica
dc.subject.lcshBuilding stones
dc.subject.lcshMetamorphic rocks
dc.subject.lcshX-rays - Diffraction
dc.titleAmmonium monoethyloxalate (AmEtOx): a new agent for the conservation of carbonate stone substrates
dc.typeArticle
dc.subject.lemacPedres de construcció
dc.subject.lemacRoques metamòrfiques
dc.subject.lemacRaigs X -- Difracció
dc.contributor.groupUniversitat Politècnica de Catalunya. GICITED - Grup Interdiciplinari de Ciència i Tecnologia en l'Edificació
dc.identifier.doi10.1039/D0NJ06001A
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://pubs.rsc.org/en/Content/ArticleLanding/2021/NJ/D0NJ06001A#!divAbstract
dc.rights.accessOpen Access
local.identifier.drac30467243
dc.description.versionPreprint
local.citation.authorGimeno, D.; Vallcorba, O.; Navarro Ezquerra, A.; Aragoni, M.; Giacopetti, L.; Arca, M.; Carcangiu, G.; Columbu, S.; Isaia, F.; Lippolis, V.; Meloni, P.; Podda, E.; Rius, J.; Pintus, A.
local.citation.publicationNameNew journal of chemistry


Fitxers d'aquest items

Thumbnail

Aquest ítem apareix a les col·leccions següents

Mostra el registre d'ítem simple