无机有机原位复合材料加固保护脆弱陶质文物的研究

采用分光测色仪、差式扫描量热仪和傅立叶红外光谱仪研究碱催化原位复合纳米级SiO2-丙烯酸酯无机/有机复合材料的颜色、分解温度、分子结构以及耐老化性能等变化,利用扫描电子显微镜考察复合材料无机相和有机相的分散状况；测试将复合材料用于陶质文物样品的抗压强度、透气性、孔分布和微观形貌等加固保护性能.研究结果表明,加入5％～10％正硅酸乙酯材料的复合材料成膜透明,提高原有材料的热稳定性和耐光老化性能,水解缩合形成的纳米级SiO2分布于丙烯酸材料内部,有机材料包覆无机纳米颗粒；复合材料的加入提高了陶质文物样品的力学性能,同时又不堵塞陶胎内部孔隙,使其具有良好的透气性能.

Properties of organic-inorganic composites used for the consolidation of damaged pottery

In order to enhance the resistance to aging and the permeability of acrylate polymers used for the protection of damaged pottery, a series of in situ composites was synthesized starting with sol containing tetraethoxysilane, which was added to polyacrylate. The color,thermal resistance,molecular structure and microstructure of composites were evaluated by spectrophotometric, DSC, ATRFTIR and SEM techniques. Important features of material performance, such as compressive strength and vapor permeability, were tested for the consolidated pottery samples. The results indicated that the insitu composites had favorable interaction between silica and acrylate copolymer, and that the addition of nano silica improved the thermal stability of the material and prevented photodegradation. The compressive strength and the vapor permeability of the damaged pottery were improved, especially in materials in which 5% to 10% tetraethoxysilane had been added.