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Study on the Stability of Nanosized Fe3O4 Magnetic Fluids
Zhang Yinyan*, Yin Yansheng, Zhang Jinsheng, Ma Laipeng
Shandong University,Key Laboratory of Liquid Structure and Heredity of Materials,Ministry of Education,Engineering Ceramics Key Laboratory of Shandong Province,Ji'nan 250061
Abstract:
The effect of interaction(attraction effect and repulsion effect)between magnetic particles on the stability of nanometer magnetic fluids was analyzed theoretically. It was pointed that the size and concentration of magnetic particles and the coating of surfactant were important factors affecting the stability of magnetic fluids. Nanosized Fe3O4 magnetic fluids were prepared by the chemical co-precipitation method. Characterized by means of TEM,zeta potential and so on,the magnetic fluids had the mean size of 10 nm and exellent stability. The stability of magnetic fluids was researched experimentally as to the factors such as the method of adding starting materials,the speed of stirring,dispersion effect,surfactants coating occasion,coating time and adding amount,and pH. The affecting mechanism of these factors was analyzed further.
Key words:  Nanosized Fe3O4,Magnetic fluids,Surfactant,TEM
FundProject:
纳米Fe3O4磁性液体稳定性的研究
张银燕*, 尹衍升, 张金升, 马来鹏
山东大学教育部液态结构及遗传性重点实验室,工程陶瓷山东省重点实验室,济南 250061
摘要:
从理论上解析了磁性颗粒之间的相互作用对纳米磁性液体稳定性的影响,指出磁粒半径和浓度,表面活性剂的包覆是影响磁液稳定性的重要因素. 采用湿化学共沉淀法制备了纳米Fe3O4磁性液体,经过TEM等手段的表征,证明平均粒径为10 nm,稳定性良好. 实验研究了加料方式、搅拌速度、分散作用、表面活性剂包覆时机、包覆时间和加入量以及pH值诸多工艺因素对磁液稳定性的影响,并分析了这些因素的影响机制.
关键词:  纳米  磁性液体  表面活性剂  稳定性  TEM
DOI:10.1088/1674-0068/17/1/83-86
分类号: