摘要
采用化学共沉淀法制备纳米Fe3O4粉体,通过机械球磨的方法研究阴离子表面活性剂十二烷基苯磺酸纳(SDBS)的用量对纳米Fe3O4的包覆结构及其磁流体分散效果的影响。对制得的样品经过XRD,HRTEM,FT-IR和XPS等进行表征。在50 mL水溶液中,当纳米Fe3O4质量为10 g,pH为4.5和球磨时间为5 h时,SDBS最佳用量为0.8 g;SDBS以化学和物理吸附在尖晶石结构的Fe3O4纳米颗粒表面,形成了Fe-O-S化学键使得纳米颗粒表面的包覆结构很难被打破,制得的磁流体具有较强的稳定性。
Fe3O4 nanoparticles were prepared with Chemical co-precipitation method.The covering structure and stability of nanosized Fe3O4 magnetic liquid effected by the dosage of sodium dodecyl benzene sulfonate(SDBS) were investigated with ball milling method.The samples were measured by X-ray diffraction(XRD),high-resolution retransmission electron microscopy(HRTEM),Fourier transform infrared spectrometry(FT-IR) and X-ray photoelectron spectroscopy(XPS).The results show that when the mass of Fe3O4 is 10 g in 50 mL water,pH is 4.5 and the ball milling time is 5 h,the better dosage of SDBS is 0.8 g.SDBS is adsorbed on the surface of Fe3O4 nanoparticles with spinel structure by multi-layer chemisorption and physisorption.And the Fe-O-S chemical bond makes the encasing structure difficult to be broken,and the magnetic liquid is stable.
出处
《中南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2011年第6期1593-1598,共6页
Journal of Central South University:Science and Technology
基金
江苏省自然科学基金重点资助项目(BK2010082)
关键词
Fe3O4磁流体
十二烷基苯磺酸钠
包覆结构
分散稳定性
Fe3O4 magnetic liquid
sodium dodecyl benzene sulfonate(SDBS)
covering structure
dispersion stability