Fe_3O_4包覆聚苯乙烯磁性微球的制备及性能  

Preparation and properties of Fe_3O_4 coated polystyrene magnetic microspheres

作　　者：薛永萍[1,2] 艾常春[1] 汤璐[2] 吴元欣[1] 

机构地区：[1]武汉工程大学化工与制药学院,武汉430073 [2]武汉工程大学邮电与信息工程学院,武汉430073

出　　处：《材料科学与工艺》2016年第2期75-79,共5页Materials Science and Technology

基　　金：国家自然科学基金重点项目(20936003);国家磷资源开发利用工程技术研究中心开放基金项目(2012-2001)

摘　　要：为研究一种应用于磁稳定流化床反应器的新型高分子磁性微球的制备方法及性能,采用悬浮聚合法制备了Fe_3O_4纳米粒子包覆聚苯乙烯磁性微球,研究了搅拌速率、加入磁性Fe_3O_4纳米粒子的时间等因素对复合微球粒径及性能的影响,运用扫描电子显微镜(SEM)、X射线衍射(XRD)、振动样品磁强计(VSM)、热重(TGA)等测试手段,表征了磁性聚苯乙烯微球的形貌特征、结构、粒径、磁学性能及Fe_3O_4的包覆量.实验结果表明:在搅拌转速为600 r/min,80℃保温10 min加入修饰Fe_3O_4纳米粒子,制备所得的磁性聚苯乙烯微球为粒径分布均匀的球状微粒;Fe_3O_4的包覆量达到5%,最高饱和磁化强度为3.73 emu/g,具有较好的超顺磁性,可应用于磁稳定流化床反应器.Aiming at investigate the preparation method and properties of a novel polymer magnetic microspheres,which could be used in magnetically stabilized fluidized bed reactor,Fe_3O_4 coated polystyrene magnetic microspheres were prepared by suspension polymerization in this study. The effects of the stirring rate,and the time of adding magnetic Fe_3O_4 nanoparticles on the particle sizes and properties of magnetic microspheres were studied. The morphology, microstructure, size, and magnetic properties of magnetic microspheres,and coating amount of Fe_3O_4 nanoparticles were characterized by using scanning electron microscope（ SEM）,X-ray diffraction（ XRD）,vibrating sample magnetometer（ VSM） and thermogravimetric analysis（ TGA） etc. The results indicated that,. for the case of 600 rpm,and a holding time of 10 min at 80 ℃ followed by adding Fe_3O_4 nanoparticles,the obtained magnetic polystyrene exhibits a homogenenous size distribution. Under these parameters,the maximum content of Fe_3O_4 nanoparticles can reach up to 5% in nitrogen atmosphere,and the maximum saturation magnetization is 3. 73 emu/g at room temperature. It is expected that the obtained magnetic polystyrene microspheres with excellent superparamagnetism can beused as the magnetically stabilized fluidized bed reactor.

关 键 词：悬浮聚合 Fe_3O_4磁性纳米粒子 表面修饰 包覆 磁性聚苯乙烯微球 

分 类 号：TQ050.4[化学工程]