环氧化偶联剂修饰纳米磁性二氧化硅微球的制备及其表征  

Preparation and characterization of 3-glycidoxypropyltrimethoxysilane films on core shell silica magnetic microspheres

作　　者：冯国栋[1] 姜娈[1] 赵卫星[1] 王艳[1] 

机构地区：[1]宝鸡文理学院化学化工系,陕西宝鸡721013

出　　处：《应用化工》2010年第8期1190-1193,共4页Applied Chemical Industry

基　　金：宝鸡文理学院科研资助项目(ZK09135;ZK09137)

摘　　要：以核壳结构的SiO2磁性微球为载体,表面修饰环氧化基团,为进一步应用于多官能团修饰提供基础。采用酯缩合法制备出磁性微球,并利用透射电镜、场发射扫描电镜、红外光谱仪、激光粒度仪、热分析仪和振动样品磁强计分别对微球的形貌、粒度分布、化学成分和磁性能进行了表征。制备的环氧化SiO2磁性微球核壳结构明显,粒径分布在200 nm左右,环氧化功能基在保证微球粒径大小的情况下成功结合在微球表面,并保持了磁性微球的超顺磁性。采用该方法制备的环氧化核壳型磁性二氧化硅微球性质稳定,为磁性微球进一步功能化提供了可能,是一种优异的生物磁性材料载体。3-Glycidoxypropyltrimethoxysilane films on core shell silica magnetic microspheres surface for multiple functional groups modification was prepared. The magnetic mierospheres were synthesized by ester condensation and characterized by the transmission electron microscope, field emission scanning electron microscopy, fourier transform infrared spectrometer, energy dispersive spectrometry, thermogravimetrie analyzer and vibrating sample magnetometry were used to characterize the appearance, chemical composition and magnetic characteristics. The prepared epoxidation silica magnetic microspheres exhibited a superior core shell structure. The size distribution of the microspheres was about 200 nm and the epoxy group was successfully binding on the microspheres surface. The microspheres retain superparamagnetic behaviorand can be used as biomaterials. The epoxidation silica magnetic microspheres were stable and also were an excellent bio-magnetic materials.

关 键 词：环氧化 核壳型 超顺磁性 

分 类 号：TB34[一般工业技术—材料科学与工程]