嵌段共聚物与阳离子表面活性剂混合模板合成介孔SiO_2  

Synthesis of Mesoporous Silica Using Block Copolymer-Cationic Surfactant Mixt ures as Templates

作　　者：马玉荣[1] 齐利民[1] 马季铭[1] 程虎民[1] 

机构地区：[1]北京大学化学学院分子动态与稳态结构国家重点实验室,北京100871

出　　处：《化学学报》2003年第10期1675-1678,共4页Acta Chimica Sinica

基　　金：国家自然科学基金 (Nos .2 0 0 0 30 0 12 0 2 330 1 0 );教育部优秀博士论文作者专项资金 (No .2 0 0 0 2 0 );留学回国启动基金资助项目

摘　　要：利用三嵌段共聚物EO2 0 PO70 EO2 0 与阳离子表面活性剂CTAB作为混合模板合成了内部孔结构与外观形貌同时受到调控的介孔氧化硅 .与使用单一共聚物模板制备的介孔氧化硅相比 ,在混合模板作用下得到的介孔氧化硅的孔结构有序度降低 ,而孔径则随混合模板中共聚物的质量分数的降低而减小 .在EO2 0 PO70 EO2 0 与CTAB质量比为 1∶1时可得到形貌完好、表面光滑的介孔氧化硅微米球 (1 5～ 4μm) ,其平均孔径为 3 2nm ,比表面积为 972m2Mixtures of triblock copolymer EO20PO70EO20 and cationic surfactant CTAB have been used as mixed templates for the synthesis of mesoporous silica with tailored pore structures and exterior morphologies. Compared with the mesoporous silica obtained by using single copolymer template, the pore structure of the mesoporous silica obtained by using the mixed templates is less ordered and its pore size decreases with decreasing weight fraction of the copolymer in the mixed templates under the studied conditions. Micrometer-sized mesoporous silica spheres ( 1.5 similar to 4 mum) with smooth surfaces, which have an average pore size of 3.2 nm and a BET surface area of 972 m(2)/g, can be prepared at 1: 1 weight ratio between EO20PO70EO20 and CTAB.

关 键 词：嵌段共聚物 阳离子表面活性剂 混合模板 合成 介孔氧化硅 

分 类 号：O613.72[理学—无机化学]