Ancient Ceramics Research Center, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 201800, China.
Institute for the Conservation of Cultural Heritage, Shanghai University, Shanghai 200444, China.
Molecules. 2020 Dec 3;25(23):5708. doi: 10.3390/molecules25235708.
In order to visually display the migration and crystallization process of salt solution in porous cultural relics, copper sulfate solution with color rendering property was selected to record the migration, crystallization and resolution of salt solution in simulated SiO samples under different environmental conditions in real time through high-resolution recording system, scanning electron microscope system, salt phase X-ray diffraction system, and so on. The results showed the migration of salt solution in porous samples was related to the structural characteristics of the porous samples, the migration rate of salt solution, the evaporation rate and the change frequency of crystallization-resolution, etc., in which the large pore size of the sample, the higher the concentration and the faster migration and evaporation rate of salt solution, the greater the change rate of the brine accumulation zone or salt crystallization zone in the different porous samples. During the humidification-drying cycles of rainfall, the higher the cycle frequency of humidification-drying was, the higher the drying temperature was, the more frequent the crystallization-analysis change of salt in the salt-bearing sample was, and the more extensive the distribution of salt crystal zone was. This is the first time to visualize the salt belt by simulating the changing process of a salt solution with a color rendering property in porous samples. This has scientific theoretical guidance for the study of the migration-crystallization changes of soluble salts contained in porous silicate cultural relics. The visibility analysis results of multilayer salt crystal belts can also provide the preliminary basis for further effective desalination of salt bearing cultural relics.
为了直观地显示盐溶液在多孔文物中的迁移和结晶过程，选择具有显色性能的硫酸铜溶液，通过高分辨率记录系统、扫描电子显微镜系统、盐相 X 射线衍射系统等，实时记录不同环境条件下模拟 SiO 样品中盐溶液的迁移、结晶和解离过程。结果表明，盐溶液在多孔样品中的迁移与多孔样品的结构特征、盐溶液的迁移速率、蒸发速率以及结晶-解析的变化频率等有关，其中样品的大孔径、盐溶液的浓度越高、迁移和蒸发速率越快，不同多孔样品中盐积累区或盐结晶区的变化率越大。在降雨的湿-干循环过程中，湿-干循环的频率越高、干燥温度越高，含盐样品中盐的结晶-解析变化越频繁，盐结晶区的分布越广泛。这是首次通过模拟具有显色性能的盐溶液在多孔样品中的变化过程来可视化盐带。这为研究多孔硅酸盐文物中可溶性盐的迁移-结晶变化提供了科学的理论指导。多层盐结晶带的可视化分析结果也为进一步有效脱盐含盐文物提供了初步依据。
