纳米Fe_3O_4磁流体的制备及其影响因素研究  

Study on Preparation and Effect of Nanosized Fe_3O_4 Magnetic Organic Fluids

作　　者：林本兰[1] 沈晓冬[1] 崔升[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《润滑与密封》2006年第10期137-140,共4页Lubrication Engineering

基　　金：江苏省2005年度研究生创新计划项目;江苏省人民医院合作项目;中国人民解放军总装备部预研管理中心项目(41312030312)

摘　　要：通过液相共沉淀法制备了Fe3O4水基磁流体,选择油酸作为表面活性剂,获得油酸包覆的Fe3O4纳米粉,将其分散于有机溶剂中,制备了纳米Fe3O4有机基磁流体。采用X-Ray衍射分析仪和粒径分布仪分析了生成物的结构和粒径分布;用FT-IR和高分辨透射电镜表征了生成物的成分和形貌。结果表明:制得的立方晶体纳米Fe3O4平均粒径为16.3 nm,FT-IR图谱中1 593、1 736和2 926 cm-1等处的吸收峰很强烈,这充分说明该纳米粒子被油酸很好地包覆;选择油酸作为表面活性剂,起到表面改性和萃取出纳米粒子的作用;制得的油酸包覆纳米Fe3O4粒子能够稳定分散于有机溶剂中。The Fe3O4 magnetic water fluids was prepared with liquid-phase coprecipitation. By using oleic acid to treat the the surface of Fe3O4 and extract the Fe3O4 from water, nanosized Fe3O4 nanoparticle coated by oleic acid was gotten, by detracting them in organic fluids, nanosized Fe3O4 magnetic organic fluids was gotten. The phase structure of the particles and the average size and size distribution were determined by X-ray diffraction （XRD） and granularity analysis instrument,the characterization was determined by FT-IR and HRTEM. Results show that the average size of the prepared cube crystal nano Fe3O4 is 16. 3 nm;the strong absorptivity at 1 593,1 736 and 2 926 cm^-1 in FT-IR spectra shows that Fe3O4 nanoparticle is coated by oleic acid;The prepared Fe3O4 nanoparticle coated by oleic acid can be detracted steadily in or- ganic fluids.

关 键 词：纳米FE3O4 磁流体 油酸 表面改性 

分 类 号：TQ138.1[化学工程—无机化工]