Investigating the photocatalytic degradation of oil paint using ATR-IR and AFM-IR

Investigating the photocatalytic degradation of oil paint using ATR-IR and AFM-IR

Morsch, Suzanne (The University of Manchester)
van Driel, B.A. (TU Delft (OLD) MSE-4; Rijksmuseum; Cultural Heritage Agency of the Netherlands)
van den Berg, Klaas Jan (Cultural Heritage Agency of the Netherlands)
Dik, J. (TU Delft (OLD) MSE-4)

2017

As linseed oil has a longstanding and continuing history of use as a binder in artistic paints, developing an understanding of its degradation mechanism is critical to conservation efforts. At present, little can be done to detect the early stages of oil paint deterioration due to the complex chemical composition of degrading paints. In this work, we use advanced infrared analysis techniques to investigate the UV-induced deterioration of model linseed oil paints in detail. Subdiffraction limit infrared analysis (AFM-IR) is applied to identify and map accelerated degradation in the presence of two different grades of titanium white pigment particles (rutile or anatase TiO₂). Differentiation between the degradation of these two formulations demonstrates the sensitivity of this approach. The identification of characteristic peaks and transient species residing at the paint surface allows infrared absorbance peaks related to degradation deeper in the film to be extricated from conventional ATR-FTIR spectra, potentially opening up a new approach to degradation monitoring.

AFM-IR
FTIR
linseed oil
photocatalytic degradation
titanium white

http://resolver.tudelft.nl/uuid:9b5d403f-10a4-45a3-a325-b0de07fab167

https://doi.org/10.1021/acsami.7b00638

2018-03-03

1944-8244

ACS applied materials & interfaces, 9 (11), 10169-10179

Accepted Author Manuscript

Institutional Repository

journal article

© 2017 Suzanne Morsch, B.A. van Driel, Klaas Jan van den Berg, J. Dik