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Baij L, Hermans JJ, Keune K, et al. Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems. Macromolecules. 2018;51(18):7134-7144doi: 10.1021/acs.macromol.8b00890.
Baij, L., Hermans, J. J., Keune, K., & Iedema, P. D. (2018). Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems. Macromolecules, 51(18), 7134-7144. https://doi.org/10.1021/acs.macromol.8b00890
Baij, Lambert, et al. "Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems." Macromolecules vol. 51,18 (2018): 7134-7144. doi: https://doi.org/10.1021/acs.macromol.8b00890
Baij L, Hermans JJ, Keune K, Iedema PD. Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems. Macromolecules. 2018 Sep 25;51(18):7134-7144. doi: 10.1021/acs.macromol.8b00890. Epub 2018 Sep 07. PMID: 30270940; PMCID: PMC6158679.
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Macromolecules. 2018 Sep 25;51(18):7134-7144. doi: 10.1021/acs.macromol.8b00890. Epub 2018 Sep 07.

Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems.

Macromolecules

Lambert Baij, Joen J Hermans, Katrien Keune, Piet D Iedema

Affiliations

  1. Van't Hoff Institute for Molecular Sciences, University of Amsterdam, PO Box 94157, 1090GD Amsterdam, The Netherlands.
  2. Conservation and Restoration, Rijksmuseum Amsterdam, PO Box 74888, 1070DN Amsterdam, The Netherlands.

PMID: 30270940 PMCID: PMC6158679 DOI: 10.1021/acs.macromol.8b00890

Abstract

In the restoration of paintings, solvent diffusion and swelling of polymeric oil paint binding media are important factors to consider. Common cleaning methods with organic solvents or aqueous solutions could lead to undesirable physicochemical changes in the paint in the long term, though the extent of this effect is not yet clear. We used tailored nonporous model systems for aged oil paint to measure paint swelling and solvent diffusion for a wide range of relevant solvents. Using dynamic mechanical analysis (DMA), the glass transition temperature of our model systems was found to be close to room temperature. Subsequently, with a custom sample cell and time-dependent attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, we were able to accurately track swelling and diffusion processes in the polymer films. To quantify the spectroscopic data, we developed a model that completely describes the solvent migration process, including significant film swelling and non-Fickian solvent diffusion. The relation between solvent properties, the diffusion coefficient, and the swelling capacity proved to be rather complex and could not be explained using a single solvent parameter. However, it was found that strongly swelling solvents generally diffuse faster than weakly swelling solvents and that pigmentation does not significantly influence solvent diffusion. These results contribute to a better understanding of transport phenomena in paintings and support the development of improved paint restoration strategies.

Conflict of interest statement

The authors declare no competing financial interest.

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