Time-Dependent ATR-FTIR Spectroscopic Studies on Fatty Acid Diffusion and the Formation of Metal Soaps in Oil Paint Model Systems.
Time-Dependent ATR-FTIR Spectroscopic Studies on Fatty Acid Diffusion and the Formation of Metal Soaps in Oil Paint Model Systems.
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DOI：
10.1002/anie.201712751
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发表时间：
2018-06-18
期刊：
影响因子：
--
通讯作者：
Iedema P
中科院分区：
文献类型：
--
作者：
Baij L;Hermans JJ;Keune K;Iedema P
金属肥皂(饱和脂肪酸的金属络合物)的形成是影响许多油画外观和结构完整性的严重问题。利用定制的老化油漆模型系统和含时衰减全反射傅里叶变换红外光谱(ATR-FTIR)研究了棕榈酸的扩散和随后的金属皂结晶。游离饱和脂肪酸和聚合物结合的金属羧酸盐的同时存在导致金属肥皂的快速结晶，遵循涉及酸和金属扩散的复杂机制。溶剂流动、水和颜料都增强了模型体系中的金属肥皂结晶。这些结果有助于制定油漆清洗策略，更好地了解油漆的降解，并突出了随时间变化的ATR-FTIR光谱在研究聚合物膜动态过程中的潜力。
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.
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