煤油基Fe_3O_4磁性流体制备及表征.pdf

36 9 Vol1 36 No1 9 2008 9 NEW CH EM ICAL MATERIALS # 47# Fe3 O4 , 2* 3 2 任志强 洪若瑜 B. Xu 李洪钟 ( . 苏州大学化学化工学院江苏省有机合成重点实验室, 苏州2 5 23; 2. 中科院过程工程研 所多相反应国家重点实验室, 北京 00080; 3. Nanotec Inc. ( Suzhou) , SIP 苏州2 5 23) 以FeCl 和FeSO 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Fe O 磁性流体 3 4 3 4 研 发现油酸可以成功地包覆在磁性颗粒表面, Fe O 磁性颗粒平均粒径为 0~ 20nm, 晶型为反尖晶石型; 磁性流体磁 3 4 化率为61 53@ 0- 4 , 磁化强度为201 9emu/ g, 可以长期稳定存在 磁性流体, 纳米粒子, 表面改性 Preparation and characterization of kerosene-based magnetic fluid , 2 3 2 Ren Zhiqiang Hong Ruoyu Xu Bai Li Hongzhong ( 1 Chem. Eng . Dept. Key Lab. of Organic Synthesis of Jiangsu Prov. , Soochow U niv. , SIP, Suzhou 2 5 23; 21 State Key Lab. of Multiphase Reaction, Inst. of Proc. Eng. , Chinese Academy of Sciences, Beijing 00080; 31 Nanotec Inc. ( Suzhou) , SIP, Suzhou 2 5 23) Abstract Using FeCl and FeSO as iron sources, kerosene as carrier liquid and oleic acid as surface modif ication a- 3 4 gent , kerosene-based magnetic fluid w as prepared by a one-step method. It was found that the nanopart icles w ere coated successfully by oleic acid. T he mean size of the magnet ic nanoparticles w ere about