多孔碳柱撑膨润土的制备与表征(英文)  

PREPARATION AND CHARACTERIZATION OF POROUS CARBON PILLARED BENTONITE

作　　者：张增志[1] 杨春卫[1] 牛俊杰[1] 

机构地区：[1]中国矿业大学(北京)生态功能材料研究所,北京100083

出　　处：《硅酸盐学报》2008年第7期1008-1012,共5页Journal of The Chinese Ceramic Society

基　　金：教育部重点(106086)资助项目

摘　　要：用十六烷基三甲基溴化铵和苄基三甲基氯化铵改性膨润土制备了多孔碳柱撑膨润土。用Fourier变换红外光谱仪、扫描电子显微镜和氮气吸附–脱附、热分析系统地研究了有机改性剂对多孔材料性能的影响。结果表明:膨润土微粒与有机改性剂以共价键和离子嵌入2种形式结合;多孔碳柱撑膨润土的微观形貌呈针片状,最可几孔径分布大约在1.7nm;多孔材料的主要结构是由碳化的大粒子柱撑而构建的二维孔径,烧结后的有机黏土热稳定性大大提高。Porous carbon pillared bentonite was prepared from bentonite modified by C19H42BrN and C10H16C1N. The porous pillared bentonite were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, nitrogen absorption/desorption, thermal-gravimetric analysis and differential scanning calorimetry. The influence of organic modifier on the characteristics of porous pillared bentonite was investigated. The results show that organic modifier combines with bentonite particles by covalent bond and ion embedding. The microstructure of porous carbon pillared bentonite looks like needle slice. The most probable pore size distribution is about 1.7 nm. The modifier slice mainly consists of two direction holes supported by a carbonization pillar. The high-temperature stability of carbon pillared bentonite was improved.

关 键 词：碳柱撑膨润土 纳米多孔材料 二维孔径 表面活性剂 十六烷基三甲基溴化铵 苄基三甲基氯化铵 

分 类 号：S156.3[农业科学—土壤学]