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Issue 96, 2016
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Ionomer-like structure in mature oil paint binding media

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Abstract

Infrared spectra of samples from oil paintings often show metal carboxylate bands that are broader and shifted compared to those of crystalline metal soap standards (metal complexes of long-chain saturated fatty acids). Using quantitative attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), it is demonstrated that the broad metal carboxylate band is typically too intense to be explained by carboxylates adsorbed on the surface of pigment particles or disordered metal complexes of saturated fatty acids. The metal carboxylate species associated with the broad bands must therefore be an integral part of the polymerized binding medium. Small-angle X-ray scattering (SAXS) measurements on model ionomer systems based on linseed oil revealed that the medium contains ionic clusters similar to more classical ionomers. These structural similarities are very helpful in understanding the chemistry of mature oil paint binding media and the potential degradation mechanisms that affect oil paintings.

Graphical abstract: Ionomer-like structure in mature oil paint binding media

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Supplementary files

Article information


Submitted
18 Jul 2016
Accepted
25 Sep 2016
First published
26 Sep 2016

This article is Open Access

RSC Adv., 2016,6, 93363-93369
Article type
Paper

Ionomer-like structure in mature oil paint binding media

J. J. Hermans, K. Keune, A. van Loon, R. W. Corkery and P. D. Iedema, RSC Adv., 2016, 6, 93363
DOI: 10.1039/C6RA18267D

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