磁性介孔氧化硅材料的制备与应用  

Preparation and Applications of Magnetic Mesoporous Silica

作　　者：朱慎林[1] 赵俊琦[1] 刁香[2] 王玉军[1] 

机构地区：[1]化学工程联合国家重点实验室清华大学化学工程系,北京100084 [2]淄博职业学院化学工程系,山东淄博255013

出　　处：《石油化工》2009年第8期811-817,共7页Petrochemical Technology

基　　金：国家重点基础研究发展规划项目(2007CB714302)

摘　　要：介绍了新型复合材料——磁性介孔氧化硅材料的制备途径和应用领域。磁性介孔氧化硅材料兼具介孔氧化硅材料和磁性纳米粒子两者的优势。该材料比较常见的制备方法包括两大类:一步法和两步法,对这两大类制备方法进行了介绍,并从介孔结构和磁性分离性能两方面对不同制备方法进行了比较。相比而言,两步法普遍存在步骤较多、耗时较长或磁性颗粒严重阻塞孔道等问题;一步法则更为简单省时,同时磁性颗粒在二氧化硅壁面内原位形成,一定程度上避免了介孔孔道的堵塞。磁性介孔氧化硅材料在药物控释、生物催化等领域展现出了良好的应用前景。Synthetic procedures and application areas of a new composite material——magnetic mesoporous silica were introduced. The material possesses advantages of both mesoporous silica materials and magnetic nanoparticles. The common synthetic methods of magnetic mesoporous silica including categories of one-step and two-step methods were introduced and compared in respect of mesoporous structure and magnetic separation performance. Two-step methods are relatively more complicated and time-consuming. The magnetic nanoparticles may clog the mesopores seriously. Comparatively, one-step methods are much easier and time-saving. The magnetic nanoparticles generate in-situ in side of silica walls which reduces clogging of mesopores to some extent. The magnetic mesoporous silica has great potential in areas of biocatalysis and controlled release of drugs.

关 键 词：磁性介孔氧化硅 介孔结构 磁性分离 药物控释 生物催化 

分 类 号：TQ424.26[化学工程]