Liu Xiaoyang, Di Tullio Valeria, Lin Yu-Chung, De Andrade Vincent, Zhao Chonghang, Lin Cheng-Hung, Wagner Molly, Zumbulyadis Nicholas, Dybowski Cecil, Centeno Silvia A, Chen-Wiegart Yu-Chen Karen
Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.
Department of Scientific Research, The Metropolitan Museum of Art, New York, NY, 10028, USA.
Sci Rep. 2020 Oct 27;10(1):18320. doi: 10.1038/s41598-020-75040-6.
The quantitative evaluation of the three-dimensional (3D) morphology of porous composite materials is important for understanding mass transport phenomena, which further impact their functionalities and durability. Reactive porous paint materials are composites in nature and widely used in arts and technological applications. In artistic oil paintings, ambient moisture and water and organic solvents used in conservation treatments are known to trigger multiple physical and chemical degradation processes; however, there is no complete physical model that can quantitatively describe their transport in the paint films. In the present study, model oil paints with lead white (2PbCO·Pb(OH)) and zinc white (ZnO) pigments, which are frequently found in artistic oil paintings and are associated with the widespread heavy metal soap deterioration, were studied using synchrotron X-ray nano-tomography and unilateral nuclear magnetic resonance. This study aims to establish a relationship among the paints' compositions, the 3D morphological properties and degradation. This connection is crucial for establishing reliable models that can predict transport properties of solvents used in conservation treatments and of species involved in deterioration reactions, such as soap formation.
对多孔复合材料的三维（3D）形态进行定量评估，对于理解质量传输现象至关重要，而质量传输现象会进一步影响其功能和耐久性。反应性多孔涂料材料本质上是复合材料，广泛应用于艺术和技术领域。在艺术油画中，已知环境湿度以及保护处理中使用的水和有机溶剂会引发多种物理和化学降解过程；然而，尚无完整的物理模型能够定量描述它们在漆膜中的传输。在本研究中，使用同步加速器X射线纳米断层扫描和单边核磁共振技术，对含有铅白（2PbCO·Pb(OH)）和锌白（ZnO）颜料的模型油画颜料进行了研究，这些颜料在艺术油画中经常出现，并且与普遍存在的重金属皂化变质有关。本研究旨在建立涂料成分、三维形态特性与降解之间的关系。这种联系对于建立可靠的模型至关重要，这些模型能够预测保护处理中使用的溶剂以及参与变质反应的物质（如皂化形成）的传输特性。
