双层包覆纳米Fe3O4颗粒水基磁流体的制备及表征

摘要

The nano Fe3O4 paticles were prepared with chemical precipitation method.And then used sodium oleate and sodium dodecyl benzene sulfonate to double-coat, stabilized water based magnetic fluid was obtained.The crystallization state, surface functional groups, particle size and magnetic properties of nano-Fe3O4 particles were investigated with XRD, IR, TEM and VSM.Then the factors influenced the magnetic fluid preparation were discussed.The results show that the stability of the double-coated water based nano-Fe3O4 particles magnetic fluid was improved obviously and the saturation magnetization intensity was 47.06 Am2· kg-1.%采用化学共沉淀法制备了纳米Fe3O4颗粒,以油酸钠和十二烷基苯磺酸钠先后进行两次包覆,制备出了稳定性较高的水基磁流体;用XRD、IR、TEM、VSM等研究了Fe3O4纳米颗粒的结晶情况、表面官能团的变化、粒径大小和磁性能,并对影响制备磁流体的因素进行了讨论.结果表明:双层包覆纳米Fe3O4颗粒水基磁流体的稳定性显著提高,其比饱和磁化强度达到了47.06Am2·kg(-1).