Laboratoire d'Archéologie Moléculaire et Structurale LAMS, Sorbonne Université, CNRS, Institut Universitaire de France, 4 pl. Jussieu, F-75005, Paris, France.
laboratoire PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, Sorbonne Université, CNRS, 4 pl. Jussieu, F-75005, Paris, France.
Angew Chem Int Ed Engl. 2022 Jan 3;61(1):e202112108. doi: 10.1002/anie.202112108. Epub 2021 Nov 23.
Egg-tempera painting is a pictorial technique widely used in the Middle Ages, although poorly studied in its physico-chemical aspects until now. Here we show how NMR relaxometry and rheology can be combined to probe egg-tempera paints and shed new light on their structure and behavior. Based on recipes of the 15th century, model formulations with egg yolk and green earth have been reproduced to characterize the physicochemical properties of this paint at the mesoscopic and macroscopic scales. The rheological measurements highlight a synergetic effect between green earth and egg yolk, induced by the interactions between them and the structural organisation of the system. H NMR relaxometry emphasizes the presence and the structure of a network formed by the yolk and the pigment.
蛋彩画是一种在中世纪广泛使用的绘画技术，尽管其物理化学方面的研究至今仍不完善。在这里，我们展示了如何将 NMR 弛豫测量和流变学结合起来探测蛋彩画，并为其结构和行为提供新的认识。基于 15 世纪的配方，我们重现了蛋黄和绿土的模型配方，以在介观和宏观尺度上表征这种颜料的物理化学性质。流变学测量突出了绿土和蛋黄之间的协同效应，这种协同效应是由它们之间的相互作用以及系统的结构组织引起的。 1 H NMR 弛豫测量强调了由蛋黄和颜料形成的网络的存在和结构。
