摘要
石质文物是中华民族的灿烂文明,是无价的不可再生的文化遗产和旅游资源,对其进行必要的保护势在必行。现阶段封护材料主要是有机高分子和一些在位聚合低聚体材料,高分子封护剂由于渗透性差、固化应力大等原因应用已被限制,低聚体以其良好的渗透性,无固化应力,与石材相容性好等原因受到更多的应用。研究了一类以甲基三乙氧基硅烷(MTEOS)、正硅酸乙酯等为单体、溶液缩聚的硅酸酯低聚体石质文物封护材料。探讨了单体用量对硅酸酯封护材料性能的影响,进行了硅酸酯封护材料的附着力、憎水性、透气性、耐可溶性盐、耐酸碱老化以及耐紫外光老化等分析测试,还进行了红外、扫描电镜等分析。通过试验分析表明,聚合过程中,MTEOS用量控制在40%(wt)时附着力及接触角达到最佳。封护后试样的耐酸碱性、耐可溶性盐、耐紫外光、透气性和抗冻融性均有不同程度的提高,结果表明研究的硅酸酯低聚体材料能够满足石质文物的封护要求。
As historical stone relics are heritages of , glorious Chinese culture, their conservation is indispensable. At present, the main seal materials for stone conservation are organic macromolecule and polymer silicate of low molecule weight. Because of bad osmosis and strong solidification stress, the macromolecule has been limitedly used. On the contrary, having good osmosis, no solidification stress and high compatibility with stone materials, polymer silicate of low molecule weight is increasingly employed. In fhis work, a kind of polymer silicate of low molecule weight, polymerized by monomer MTEOS and TEOS, used to seal historical stone relics, was analyzed. The effects of the coating film with different monomer amount on the nature of seal materials are discussed, including adhesion, ageing resistance, gas permeability, soluble salt tolerance and ultraviolet radiation tolerance. Besides, analytical techniques such as IR and SEM were also used to study the materials. The experimental analyses indicated that during polymerization process, adhesion and dosage effect of the product were optimum when the MTEOS reaches 40%. And after sealing, the acidproof alkalinity, soluble salt tolerance, ultraviolet radiation tolerance, freezing and thawing tolerance got enhanced in vary degree. This research concludes that low polymer silicate ester can meet the request of sealing the historical stone relics.
出处
《文物保护与考古科学》
2007年第3期26-31,共6页
Sciences of Conservation and Archaeology
基金
国家文物局文物保护科学和技术研究课题资助(项目编号20030020)
关键词
硅酸酯低聚体
石质文物
保护
Silicate ester
Historical stone relics
Conservation
