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Conservation of Archaeological Bones: Assessment of Innovative Phosphate Consolidants in Comparison with Paraloid B72

  • Identification data

    Identifier: imarina:9282176
    Authors:
    Diaz-Cortes, AndreaGraziani, GabrielaBoi, MarcoLopez-Polin, LuciaSassoni, Enrico
    Abstract:
    Aqueous solutions of diammonium hydrogen phosphate (DAP) have been recently proposed for consolidation of archeological bones, as an alternative to traditional products. Here, we investigated several routes to improve the performance of the DAP-based treatment, namely increasing the DAP concentration, adding calcium ions and adding ethanol to the DAP solution. Archaeological bones dated to about 1-0.8 million years ago were used for the tests. After preliminary screening by FTIR microscopy and FEG-SEM among different formulations, confirming the formation of new hydroxyapatite phases, the most promising formulation was selected, namely a 3 M DAP solution. The strengthening ability of this formulation was systematically compared to that of the most widely used commercial consolidant, namely Paraloid B72. The performance of the two treatments was evaluated in terms of Knoop and Vickers microhardness, resistance to scratch and resistance to material loss by peeling off. The results of the study show that the DAP treatment was able to improve the bone surface properties and also the resistance to material loss by peeling off, which is more dependent on in-depth consolidation. Paraloid B72 led to the formation of a layer of acrylic resin on the bone surface, which influenced the mechanical tests. Nonetheless, Paraloid B72 was able to penetrate in depth and substantially decrease the material loss by peeling off, even more effectively than DAP. The results of this study indicate that the potential of the DAP treatment for bone consolidation is confirmed.
  • Others:

    Author, as appears in the article.: Diaz-Cortes, Andrea; Graziani, Gabriela; Boi, Marco; Lopez-Polin, Lucia; Sassoni, Enrico;
    Department: Història i Història de l'Art
    URV's Author/s: López-Polin Dolhaberriague, Lucía
    Keywords: Site Scratch test Scotch tape test Removal Remains Raman Microhardness Hydroxyapatite Ftir Diagenesis Crystals Collagen Coatings Ammonium phosphate
    Abstract: Aqueous solutions of diammonium hydrogen phosphate (DAP) have been recently proposed for consolidation of archeological bones, as an alternative to traditional products. Here, we investigated several routes to improve the performance of the DAP-based treatment, namely increasing the DAP concentration, adding calcium ions and adding ethanol to the DAP solution. Archaeological bones dated to about 1-0.8 million years ago were used for the tests. After preliminary screening by FTIR microscopy and FEG-SEM among different formulations, confirming the formation of new hydroxyapatite phases, the most promising formulation was selected, namely a 3 M DAP solution. The strengthening ability of this formulation was systematically compared to that of the most widely used commercial consolidant, namely Paraloid B72. The performance of the two treatments was evaluated in terms of Knoop and Vickers microhardness, resistance to scratch and resistance to material loss by peeling off. The results of the study show that the DAP treatment was able to improve the bone surface properties and also the resistance to material loss by peeling off, which is more dependent on in-depth consolidation. Paraloid B72 led to the formation of a layer of acrylic resin on the bone surface, which influenced the mechanical tests. Nonetheless, Paraloid B72 was able to penetrate in depth and substantially decrease the material loss by peeling off, even more effectively than DAP. The results of this study indicate that the potential of the DAP treatment for bone consolidation is confirmed.
    Thematic Areas: Physics, applied Nanoscience & nanotechnology Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science General chemical engineering Engenharias ii Chemistry, multidisciplinary Chemical engineering (miscellaneous) Chemical engineering (all)
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: lucia.lopezpolin@urv.cat
    Author identifier: 0000-0002-5810-4115
    Record's date: 2024-09-07
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.mdpi.com/2079-4991/12/18/3163
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Nanomaterials. 12 (18):
    APA: Diaz-Cortes, Andrea; Graziani, Gabriela; Boi, Marco; Lopez-Polin, Lucia; Sassoni, Enrico; (2022). Conservation of Archaeological Bones: Assessment of Innovative Phosphate Consolidants in Comparison with Paraloid B72. Nanomaterials, 12(18), -. DOI: 10.3390/nano12183163
    Article's DOI: 10.3390/nano12183163
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2022
    Publication Type: Journal Publications
  • Keywords:

    Chemical Engineering (Miscellaneous),Chemistry, Multidisciplinary,Materials Science (Miscellaneous),Materials Science, Multidisciplinary,Nanoscience & Nanotechnology,Physics, Applied
    Site
    Scratch test
    Scotch tape test
    Removal
    Remains
    Raman
    Microhardness
    Hydroxyapatite
    Ftir
    Diagenesis
    Crystals
    Collagen
    Coatings
    Ammonium phosphate
    Physics, applied
    Nanoscience & nanotechnology
    Materials science, multidisciplinary
    Materials science (miscellaneous)
    Materials science (all)
    General materials science
    General chemical engineering
    Engenharias ii
    Chemistry, multidisciplinary
    Chemical engineering (miscellaneous)
    Chemical engineering (all)
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