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Chemical Changes in Pictorial Models: Characterization by FT-IR Spectroscopy

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Urbina, Veronica
Pradell Cara, TrinitatMés informacióMés informacióMés informació
Salvadó Cabré, NativitatMés informacióMés informacióMés informació
Buti Papiol, SalvadorMés informacióMés informacióMés informació
Ruvalcaba, José Luis
Document typeConference report
Defense date2009
Rights accessRestricted access - publisher's policy
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
In order to understand the interaction between copper containing pigments and the organic binders in paintings, as well as reaction/alteration products, a series of pictorial models have been prepared and naturally aged. For this research, Fourier transform infrared spectroscopy (FT-IR) is used as the analytical technique, while it is useful in detecting functional groups, so it allows the identification of significant changes in the cured mechanism of the system prepared. For simulating the oil painting system, the methodology was based in thin-films so previously synthesized copper green pigments – identified as copper acetates, copper hydroxichlorides and mixtures of acetates and hydroxichlorides – have been mixed with the binding media (drying oils). These mixtures were layered on glass supports. By means of FT-IR measurements the oxidation is evident while a decrease in the hydrocarbon stretching and bending frequencies is observed (bands at 3000 - 2800 cm - 1). Another change in the models is the appearance of a shoulder in the region between 15 00 to 1600 cm - 1, which turns into a peak during the decay process.
CitationUrbina, V. [et al.]. Chemical Changes in Pictorial Models: Characterization by FT-IR Spectroscopy. A: 2nd Latin-American Symposium on Physical and Chemical Methods in Archaeology, Art and Cultural Heritage Conservation& Archaeological and Arts Issues in Materials Science - IMRC 2009. "2nd Latin-American Symposium on Physical and Chemical Methods in Archaeology, Art and Cultural Heritage Conservation Symposium on Archaeological and Arts Issues in Materials Science IMRC 2009". Cancún: 2009, p. 10-14. 
URIhttp://hdl.handle.net/2117/28110
ISBN978-607-02-2017-3
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  • Departament d'Enginyeria Química - Ponències/Comunicacions de congressos [318]
  • Departament de Física i Enginyeria Nuclear (fins octubre 2015) - Ponències/Comunicacions de congressos [155]
  • AMPC - Anàlisi de materials de Patrimoni Cultural - Ponències/Comunicacions de congressos [6]
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