改性有机硅在模拟漆底彩绘保护中的应用研究

为探索防止秦兵马俑彩绘的生漆底层和陶体脱落的方法,用设计的几种以有机硅为基体的加固剂将老化生漆片分别黏附到经过预处理的陶表面,从而针对加固剂固化速率、渗透性、铺展性、粘结强度等五方面进行了比较实验。结果表明,加固剂的粘结强度与加固剂本身、加固剂固化温度以及固化后的成膜比例有关;改性有机硅与陶体以及生漆底层均有很好的润湿性,固化工艺合适即能起到很好的粘结效果;配方A3(有机硅、二甲苯、三乙醇胺混合体)具有良好的综合性能,在秦俑彩绘保护中可能有一定的应用前景。

Application of a modified silicone for the protection of simulated painted lacquer layer

To prevent the lacquer base layer from peeling off the pottery body of Qin Terra-cotta figures, several strengthening reagents based on modified silicones were used to glue aged lacquer pieces to treated pottery surfaces. Five aspects of the reagents, including velocity of solidification, fluidity, osmosis, ductility and adhesive strength, were evaluated. The adhesive strength of reagent is related to characteristics of the reagent, the solidification temperature and the film area ratio after solidification. Modified silicone reagents can wet both the pottery and the Chinese lacquer pieces. Good bonding effects could be achieved by choosing the right technique. Formula A3, a mixture of silicone, xylene and triethanolamine, performed well and could be used for conservation of painted lacquer layer of Qin Terracotta figures