Time‐Dependent ATR‐FTIR Spectroscopic Studies on Fatty Acid Diffusion and the Formation of Metal Soaps in Oil Paint Model Systems

The formation of metal soaps (metal complexes of saturated fatty acids) is a serious problem affecting the appearance and structural integrity of many oil paintings. Tailored model systems for aged oil paint and time‐dependent attenuated total reflection Fourier transform infrared (ATR‐FTIR) spectro...

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Vydáno v:Angewandte Chemie International Edition Ročník 57; číslo 25; s. 7351 - 7354
Hlavní autoři: Baij, Lambert, Hermans, Joen J., Keune, Katrien, Iedema, Piet
Médium: Journal Article
Jazyk:angličtina
Vydáno: Germany Wiley Subscription Services, Inc 18.06.2018
John Wiley and Sons Inc
Vydání:International ed. in English
Témata:
Carboxylates
Communication
Communications
Coordination compounds
Crystallization
Diffusion
Fatty acids
Fourier transforms
Infrared reflection
Infrared spectroscopy
IR spectroscopy
Metal complexes
metal soaps
Oil painting
oil paintings
Palmitic acid
Pigments
Polymer films
Polymers
Soap
Soaps
Spectroscopic analysis
Spectroscopy
Spectrum analysis
Structural integrity
Time dependence
Vegetable oils
oil paintings
IR spectroscopy
metal soaps
ISSN:1433-7851, 1521-3773, 1521-3773
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Popis
Shrnutí:The formation of metal soaps (metal complexes of saturated fatty acids) is a serious problem affecting the appearance and structural integrity of many oil paintings. Tailored model systems for aged oil paint and time‐dependent attenuated total reflection Fourier transform infrared (ATR‐FTIR) spectroscopy were used to study the diffusion of palmitic acid and subsequent metal soap crystallization. The simultaneous presence of free saturated fatty acids and polymer‐bound metal carboxylates leads to rapid metal soap crystallization, following a complex mechanism that involves both acid and metal diffusion. Solvent flow, water, and pigments all enhance metal soap crystallization in the model systems. These results contribute to the development of paint cleaning strategies, a better understanding of oil paint degradation, and highlight the potential of time‐dependent ATR‐FTIR spectroscopy for studying dynamic processes in polymer films. The formation of metal soaps (metal complexes of saturated fatty acids) is a serious problem affecting the appearance and structural integrity of many oil paintings. Tailored model systems for aged oil paint and time‐dependent ATR‐FTIR spectroscopy were used to study the diffusion of palmitic acid and subsequent metal soap crystallization.
Bibliografie:These authors contributed equally to this work.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.201712751