微生物水泥基材料的红外光谱研究  

Study on infra-red spectra of microbe cementitious materials

作　　者：荣辉[1] 钱春香[1] 李龙志[1] 

机构地区：[1]东南大学材料科学与工程学院,江苏南京211189

出　　处：《功能材料》2013年第23期3408-3411,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51072035);教育部博士点基金资助项目(20090092110029);江苏省普通高校研究生科研创新计划资助项目(CXZZ-0145);东南大学优秀博士学位论文基金资助项目(YBJJ1127);<科技导报>博士生创新研究资助计划资助项目(kjdb2011001)

摘　　要：微生物水泥是在节能减排大环境下而研发的一种新型生物水泥。利用X射线衍射(XRD)、透射电镜(TEM)和红外光谱(IR)分别对微生物水泥基材料的成分、形貌、微观结构进行了研究。TEM分析表明,微生物水泥基材料内部微观结构与化学法浇注的砂颗粒内部微观结构不同。微生物矿化形成的方解石可以胶结松散颗粒,而化学法形成的方解石与松散颗粒之间存在孔隙,不能胶结松散颗粒;IR分析表明,微生物水泥基材料中的Si—O键和C—O键频率均发生红移,而化学法浇注的砂颗粒中Si—O键和C—O键频率未发生改变,另外,化学法浇注的砂颗粒中Si—O键与单纯石英砂中的Si—O键频率相同。Microbe cement was a new kind of biological cement due to the ever increasing awareness of environmental protection. The composition, morphology and microstructure were researched by X-ray diffraction （XRD）, transmission electron microscope （TEM） and infra-red spectra （IR）. TEM results showed that the microstructure of microbe cementitious materials was different with that by chemical methods. The calcite produced by microbial could bind loose particles and that produced by chemical methods could not bind particles. IR results indicated that the frequency of Si-O and C--O took up the extent of the red shifts. However, the frequency of Si-O and C-O could not change. Moreover, the frequency of Si-O at quartz sand by chemical method and at pure quartz sand was the same.

关 键 词：微生物水泥基材料 方解石 红外光谱 Si-O键 C-O键 

分 类 号：TU522[建筑科学—建筑技术科学]