硅油基纳米Fe3O4磁性液体的制备
Preparation of Silicon-oil-based Nano Fe3O4 Magnetic Fluid
摘 要
采用化学共沉淀法,成功制备了纳米Fe3O4微粒,主要研究了Fe2+与Fe3+不同物质的量比对Fe3O4微粒、粒径及磁化强度的影响,采用不同表面活性剂制备了硅油基纳米Fe3O4磁性液体.结果表明:Fe2+与Fe3+物质的量比对Fe3O4微粒性能影响显著,对微粒尺寸影响不大,均为纳米级,当Fe2+与Fe3+物质的量比为0.6时,其饱和磁化强度达到最大,为52.1 A·m2·kg-1;在无水乙醇中,聚乙烯吡咯烷酮(PVP)的分散效果虽优于油酸,但与硅油相溶性差、增粘作用明显的缺点限制了PVP的使用;而油酸由于亲油性好,更适合作为制备硅油基Fe3O4磁性液体的表面活性剂.
磁性液体
表面活性剂
nano Fe3O4 particle
magnetic fluid
surfactant
Abstract
Nano Fe3O4 particles were successfully prepared by chemical co-precipitation process.The effect of amount of substance ratio of Fe2+ and Fe3+ on diameter and magnetization of Fe3O4 particles was systematically studied.Different surfactants were used to prepare silicon-oil-based magnetic fluid.The results indicat that the amount of substance ratio of Fe2+ and Fe3+ had obvious effect on the properties of Fe3O4 particles,but had little effect on particle size which was all for nanometer.When the amount of substance ratio of Fe2+ and Fe3+ was 0.6,the saturation magnetization reached the maximum,52.1 A·m2·kg-1.Though the dispersion performance of polyvinyl pyrrolidone(PVP) was better than that of oleic acid in ethanol,bad compatibility with silicon oil and tackifying effect limited its application.Silicon-oil-based nano magnetic fluid could be prepared using oleic acid as surfactant because of excellent lipophilicity.
中图分类号 TQ138.1
所属栏目 材料性能及其应用
基金项目
收稿日期 2008/7/2
修改稿日期 2009/5/6
网络出版日期
作者单位点击查看
备注陆小荣(1963-),男,江苏宜兴人,副教授,学士.
引用该论文: LU Xiao-rong,WANG Chao,ZHANG Zhen-zhong. Preparation of Silicon-oil-based Nano Fe3O4 Magnetic Fluid[J]. Materials for mechancial engineering, 2009, 33(7): 37～39
陆小荣,王超,张振忠. 硅油基纳米Fe3O4磁性液体的制备[J]. 机械工程材料, 2009, 33(7): 37～39
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