古木硅化处理对其物化性能的影响  

Influence of Silicification Treatment on Physical and Chemical Properties of Ancient Wood

作　　者：黄正峰[1] 奚三彩[2] 孙国平[3] 张溪文[1] 

机构地区：[1]浙江大学材料科学与工程学院,浙江杭州310027 [2]浙江大学文化遗产研究院,浙江杭州310027 [3]浙江省文物考古研究所,浙江杭州310014

出　　处：《材料科学与工程学报》2016年第4期526-529,534,共5页Journal of Materials Science and Engineering

摘　　要：在田螺山遗址的挖掘过程中,出土了大量的木质文物。由于年代久远且长期处于潮湿环境,木质文物现已出现腐朽、开裂等问题,濒临毁灭。为对这些古木实施保护,我们受自然界硅化木的启发,将这些古木进行硅化处理。为在较短时间内实现长期有效的原位硅化加固目的,我们采用电渗法先对古木进行加速硅化处理,再进行钙化处理。在电子显微镜下可见,经处理后的古木内部由层片状硅酸钙大量填充,而表面则被细致的硅酸钙颗粒完整覆盖。在宏观性能上,经处理后古木抗压性能提升了150%左右,保水性能亦大幅提升,不易失水干缩,这种硅化处理对古木起到了强化保护作用。A huge number of invaluable ancient wooden pillars were discovered during the excavation of the Tianluo-Mountain site. These ancient wooden pillars are close to fracture and decay on account of the humid environment and age. To protect these wooden pillars, we tried to change the woods into silicified ones. In order to achieve the purpose of long-term reinforcement in situ, we silicified wood firstly and treated wood with calcium ion successively. In SEM we could see that the interior of treated wood was filled with lamellar CaSiO3 and the surface was completely covered with a layer of fine particles. In the macro performance, wood＇s compressive strength was improved from 0. 870MPa to 2. 210MPa and water-holding capacity was enhanced. We can say that we have strengthened the ancient wood successfully.

关 键 词：古木 电渗 硅酸钙 原位保护 

分 类 号：K876.6[历史地理—考古学及博物馆学]