一种离子型磁性液体的制备与性质  

Preparation of an Ionic Ferrofluid and Its Properties

作　　者：陈龙龙[1] 李建[1] 林立华[1] 

机构地区：[1]西南大学物理科学与技术学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2013年第3期91-96,共6页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11074205)

摘　　要：采用了一种新方法制备出了经ZnCl2表面调制处理的γ-Fe2O3磁性纳米微粒,并用这种微粒合成了稳定的磁性液体.利用透射电子显微镜(TEM)对该微粒进行了形态观察与粒径分析,并与未经表面调制处理的γ-Fe2O3纳米微粒进行了对比研究.利用粘度计测量了磁性液体的粘度.利用振动样品磁强计(VSM)对调制处理过的及未调制处理的纳米微粒和磁性液体的磁化性质进行了表征.实验结果表明,经ZnCl2表面调制处理过的微粒近似球形,粒径比γ-Fe2O3纳米微粒大,比饱和磁化强度比γ-Fe2O3纳米微粒小.粘度随质量分数的增大呈现非单调变化.该制备磁性液体的方法与Massart法相比,减少了处理步骤,制备方法更为简洁.A new method were treated with ZnCl2 d was developed to prepare ionic ferrofluids, in which the 7-Fe2O3 nanoparticles uring synthesis. Transmission electron microscopy （TEM） was performed to ex- amine and compare the morphology of treated and untreated particles. In addition, the viscosity of the fer rofluids with different mass fractions was measured with a vibro-viscosimeter （VVM）. The magnetization curves of the treated and untreated nanoparticles and ferrofluids were measured by vibrating sample mag- netometry （VSM）. The experimental results showed that the y-Fe2O3-treated particles were approximate- ly spherical in shape, their particle size was larger than that of the untreated nanoparticles and their specif ic saturation magnetization was smaller than that of the untreated nanoparticles. The viscosity showed a non-monotonic change with increasing mass fraction. Compared with the Massart method, the proposed preparation method reduces processing steps and is more concise.

关 键 词：纳米微粒 磁性液体 制备 处理 

分 类 号：O482.54[一般工业技术—材料科学与工程] TM27[理学—固体物理]