真空热处理制备无定形层柱粘土的研究  

Preparation of amorphous pillared interlaid clay by vacuum heat treatment

作　　者：张增志[1] 杨春卫[1] 牛俊杰[1] 黄华[1] 王宏娟[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：《材料热处理学报》2008年第3期22-25,共4页Transactions of Materials and Heat Treatment

基　　金：教育部重点项目(106086)

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得了有机粘土,并经真空热处理得到无定形层柱粘土。用扫描电子显微镜、氮气吸附-脱附、X射线衍射仪和热分析等手段研究了改性剂和热处理对粘土性能的影响。结果表明:有机粘土经烧结后微观形貌呈针片状,平均孔径减小,比表面积增大,粘土片层的平行板被烧结后碳化的大粒子柱撑而构建二维孔径,烧结后的有机粘土的热稳定性大大提高。Organic clay was prepared from bentonite modified by C19 H42 BrN and C10H16CIN, then amorphous pillared interlayer clay was obtained by vacuum heat treatment. The influence of organic modifier and heat treatment on the properties of the clay was characterized by scanning electron microscope, nitrogen absorption/ desorption, X-ray diffraction, thermal-gravity analysis, respectively. The results indicate that the sintered clay appears needle-slice state in micro morphology, with smaller average pore size and larger specific surface area after the vacuum heat treatment. Parallel clay layers are pillared by carbonized particles to form two-dimensional pore diameters. And the thermal stability of the clay can be significantly improved by this treatment.

关 键 词：无定形层柱粘土 二维孔径 热稳定性 真空热处理 

分 类 号：S156.3[农业科学—土壤学]