介孔中空二氧化硅微球制备及吸附缓释性能研究  

Preparation and sustained release property of mesoporous and hollow silica microspheres

作　　者：冯雪风[1,2] 金卫根[1,2] 杨婥[1,2] 

机构地区：[1]东华理工大学核资源与环境教育部重点实验室,江西南昌330013 [2]东华理工大学化学生物与材料科学学院

出　　处：《无机盐工业》2009年第9期18-20,共3页Inorganic Chemicals Industry

基　　金：核资源与环境教育部重点实验室开放基金项目(070707)

摘　　要：以用分散聚合法制得的不同粒径单分散阳离子型聚苯乙烯球为模板、十二胺为表面活性剂,通过溶胶-凝胶方法,在模板上包裹二氧化硅壳,并通过浸渍和焙烧制备了具有介孔结构的中空二氧化硅微球。TEM,SEM显示微球具有很好的单分散性和中空结构。小角XRD表明球壳上具有六方介孔结构。实验表明控制模板粒子大小可改变介孔中空二氧化硅微球粒径,改变正硅酸乙酯浓度可以调整二氧化硅球壳厚度。通过对丁基罗丹明B染料的吸附装载与释放实验证实了其有很好的渗透性和缓释性能。Hollow silica microspheres with mesoporous structure were prepared by sol - gel method. In the approach, monodispersed cationic polystyrene microspheres with different size prepared by dispersion polymerization were used as tem- plate, dodecylamine as surfactant,the silica shell then coated PS mierospheres. At last hexagonal mesoporous and hollow sili- ca microspheres were produced by impregnant and calcination process. TEM and SEM results showed that silica micro- spheres were monodispersed and hollow;SXRD showed that hexagonal mesopores are in silica mierosphere shell;experiment results indicated that the size of silica microspheres can be adjusted by the size of template microspheres, and thickness of the silica shell can be changed by adjusting tetraethyl orthosilieate. Experiment of adsorption load and release to butyl rhoda- mine B dye confirmed hexagonal mesoporous and hollow silica mierospheres have good permeability and sustained release performance.

关 键 词：六方介孔 二氧化硅 缓释 

分 类 号：TQ127.2[化学工程—无机化工]