蒙脱土多孔异构材料合成条件初探  

Preliminary study on synthesis conditions of porous montmorillonite heterostructured materials

作　　者：李庆伟[1] 周春晖[1] 葛忠华[1] 王敏华[1] 林春绵[2] 王旭[1] 

机构地区：[1]浙江工业大学化工学院,浙江杭州310032 [2]浙江工业大学生环学院,浙江杭州310032

出　　处：《浙江工业大学学报》2002年第2期95-99,共5页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目 ( 2 0 10 5 7)

摘　　要：采用天然膨润土为原料 ,提纯后用季铵盐 (如十六烷基三甲基溴化铵 )有机改性成有机土 ,然后与中性胺 (如十二胺和八烷胺 )及正硅酸乙酯以一定的比例混合反应 4h ,经分离 ,干燥 ,焙烧后合成出蒙脱土多孔粘土异构材料。通过XRD、TGA等表征手段对这些中间产品和成品进行了分析测试 ,考察了不同链长的中性胺、不同的有机土等对材料合成的影响。结果表明用商品有机土和八烷胺合成的样品具有 2 6 .4 的孔道高度 ,达到中孔 ,且其热稳定性可达 80 0℃以上。The natural bentonite was purified and then modified by quaternary ammonium (such as cetyltrimethylammonium bromide/CTAB). Mixtures of the modified bentonite, neutral amine (such as octylamine) and tetraethylorthosilicate/TEOS at a certain molar ratio were allowed to react for 4 h. The resulting intercalates were centrifuged, dried in air and calcined, therefore a novel porous montmorillonite heterostructured material has been synthesized. The synthesized materials were characterized by X-ray diffraction/XRD, thermogravimetric analysis/TG techniques, and the influences of the different amines and different modified bentonites on the synthesized material were studied. The results show that the materials have a gallery height of 26.4 ? and a high thermal stability up to 800 ℃.

关 键 词：异构材料 有机改性 蒙脱土 多孔材料 有机土 催化剂 

分 类 号：O643.36[理学—物理化学] TB383[理学—化学]