煤油基Fe_3O_4磁性流体制备及表征  

Preparation and characterization of kerosene-based magnetic fluid

作　　者：任志强[1] 洪若瑜[1] B. Xu 李洪钟[3] 

机构地区：[1]苏州大学化学化工学院江苏省有机合成重点实验室,苏州215123 [2]Nanotec Inc. (Suzhou),SIP,苏州215123 [3]中科院过程工程研究所多相反应国家重点实验室,北京100080

出　　处：《化工新型材料》2008年第9期47-48,59,共3页New Chemical Materials

基　　金：国家自然科学基金(编号:20476065;20736004);中科院过程所多相反应与复杂系统国家重点实验室基金(编号:2006-5);中科院煤化所煤转化国家重点实验室基金(编号:2006-902);南京医科大学研发基金(NY0586)

摘　　要：以FeCl3和FeSO4为铁源,以煤油为载液,用油酸为表面改性剂,采用一步法制备煤油基Fe3O4磁性流体。研究发现油酸可以成功地包覆在磁性颗粒表面,Fe3O4磁性颗粒平均粒径为10~20nm,晶型为反尖晶石型;磁性流体磁化率为6.53×10^-4,磁化强度为20.9emu/g,可以长期稳定存在。Using FeCl3 and FeSO4 as iron sources, kerosene as carrier liquid and oleic acid as surface modification a- gent, kerosenc-hased magnetic fluid was prepared by a one-step method. It was found that the nanoparticles were coated successfully by oleic acid. The mean size of the magnetic nanoparticles were about 10-20nm, and their morphology was inverse spinel. The synthesized magnetic fluid demonstrated excellent stability, and had susceptibility of 6.53×10^- 4 and saturation magnetization of 20.9emu/g.

关 键 词：磁性流体 纳米粒子 表面改性 

分 类 号：TB383.1[一般工业技术—材料科学与工程]