Pagnin Laura, Zendri Elisabetta, Izzo Francesca Caterina
Academy of Fine Arts Vienna, Institute of Science and Technology in Art, Schillerplatz 3, 1010 Vienna, Austria.
Department of Environmental Sciences, Informatics, and Statistics, Ca' Foscari University of Venice, Via Torino 155/b, 30174 Venice, Italy.
Polymers (Basel). 2022 Apr 29;14(9):1831. doi: 10.3390/polym14091831.
Knowledge of the chemical-physical reactions that determine the main degradation behaviour of artists' alkyd paints represents one of the main problems within the museum exhibitions. The collection and interpretation of these data on degradation phenomena, especially after ozone exposure at different relative humidity values, can be useful for their conservation needs. Therefore, a systematic investigation of these materials may help achieve this goal. Firstly, surface-level identification of the main functional groups of ad hoc created and aged alkyd paints was performed using attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR). Subsequently, these paints were investigated by pyrolysis-gas chromatography and mass spectrometry (Py-GC/MS), allowing for precise bulk identification of the organic compounds before and after accelerated ageing. A first successful attempt to provide quantitative Py-GC/MS data on alkyd-based paints is here presented and discussed. Comparing the results, it was possible to obtain new insights into the degradation behaviour of alkyd paints when exposed to ozone, allowing us to devise specific preventive and conservation strategies for these artistic materials.
了解决定艺术家醇酸漆主要降解行为的化学物理反应是博物馆展览中的主要问题之一。收集和解释这些关于降解现象的数据，特别是在不同相对湿度值下暴露于臭氧后的数据，对于它们的保护需求可能是有用的。因此，对这些材料进行系统研究可能有助于实现这一目标。首先，使用衰减全反射傅里叶变换红外光谱（ATR-FTIR）对专门制备和老化的醇酸漆的主要官能团进行表面水平鉴定。随后，通过热解气相色谱和质谱（Py-GC/MS）对这些漆进行研究，从而能够在加速老化前后对有机化合物进行精确的整体鉴定。本文展示并讨论了首次成功提供基于醇酸漆的定量Py-GC/MS数据的尝试。通过比较结果，可以获得关于醇酸漆在暴露于臭氧时降解行为的新见解，从而使我们能够为这些艺术材料制定具体的预防和保护策略。
