Conservation of weathered historic sandstone with biomimetic apatite  

作　　者：YANG FuWei LIU Yan ZHU YuanCheng LONG ShiJia ZUO GuoFang WANG ChangQing GUO Feng ZHANG BingJian JIANG SiWei 

机构地区：[1]Key Laboratory for New Molecule Material Design and Function, Tianshui Normal University, Tianshui 741000, China [2]Department of Chemistry Zhejiang University, Hangzhou 310027, China, [3]The Art Museum of Dazu Rock Carvings, Chongqing 632360, China

出　　处：《Chinese Science Bulletin》2012年第17期2171-2176,共6页

基　　金：supported by the Key Project of the Chinese Ministry of Education (211189);"QingLan" Talent Engineering Funds of Tianshui Normal University

摘　　要：The conservation of weathered historic sandstone with apatite was studied.Based on the growth mechanism of bone,calcium and phosphorus were introduced into weathered sandstone and then mineralized at room temperature.The conservation efficiency was investigated by scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX),transmission electron microscopy(TEM),selected area electron diffraction(SAED),X-ray diffraction(XRD),and compressive strength,capillary water uptake,water vapor permeability and weather resistance tests.The SEM,EDX,TEM,SAED and XRD results showed that the produced hydroxyapatite could reunite the weathered stone blocks and provide sufficient reinforcement to hold them together.The results of the various tests indicated that the compressive strength and weather resistance of the treated samples was improved significantly.In addition,because of the porous nature of apatite,the water vapor permeability of the treated stone was not affected and its breathability was maintained.The conservation of weathered historic sandstone with apatite was studied. Based on the growth mechanism of bone, calcium and phosphorus were introduced into weathered sandstone and then mineralized at room temperature. The conservation efficiency was investigated by scanning electron microscopy （SEM）, energy-dispersive X-ray spectroscopy （EDX）, transmission electron microscopy （TEM）, selected area electron diffraction （SAED）, X-ray diffraction （XRD）, and compressive strength, capillary water uptake, water vapor permeability and weather resistance tests. The SEM, EDX, TEM, SAED and XRD results showed that the produced hydroxyapatite could reunite the weathered stone blocks and provide sufficient reinforcement to hold them together. The results of the various tests indicated that the compressive strength and weather resistance of the treated samples was improved significantly. In addition, because of the porous nature of apatite, the water vapor permeability of the treated stone was not affected and its breathability was maintained.

关 键 词：羟基磷灰石 风化砂岩 历史意义 扫描电子显微镜 透射电子显微镜 仿生 保育 X射线光谱仪 

分 类 号：P512.1[天文地球—地质学]