CAJ | 학술논문

采用超声波辅助部分还原共沉淀法制备超顺磁性Fe3O4纳米粒子。采用红外光谱仪（FT-IR）、X射线衍射（XRD）、振动样品磁强计（VSM）和粒径测试等手段对磁性纳米粒子进行表征，研究了不同表面改性剂（油酸、十二烷基苯磺酸钠、葡聚糖）对制备的磁性粒子的晶粒尺寸、磁性能及颗粒分散性的影响。结果表明，采用表面活性剂包覆改性后Fe3O4纳米粒子的XRD峰明显宽化，晶粒直径由未改性的18.5nm减小至6.0～9.0nm，饱和磁化强度因晶粒尺寸的减小而降低，且改性后颗粒在溶液中的分散性提高。
채용초성파보조부분환원공침정법제비초순자성Fe3O4납미입자。채용홍외광보의（FT-IR）、X사선연사（XRD）、진동양품자강계（VSM）화립경측시등수단대자성납미입자진행표정，연구료불동표면개성제（유산、십이완기분광산납、포취당）대제비적자성입자적정립척촌、자성능급과립분산성적영향。결과표명，채용표면활성제포복개성후Fe3O4납미입자적XRD봉명현관화，정립직경유미개성적18.5nm감소지6.0～9.0nm，포화자화강도인정립척촌적감소이강저，차개성후과립재용액중적분산성제고。
Superparamagnetic Fe3O4 nanoparticles were synthesized via a modified coprecipitation method, and were characterized with FTIR, XRD, VSM and DLS, respectively. The influences of kinds of surfactants (oleic acid, sodium dodecyl benzene sulfonate and dextran) on the grain size, magnetic properties and dispersity were investigated. The results show that, the peaks of XRD patterns of the modified Fe3O4 nanoparticles have an obviously broadening. Comparing with unmodified sample, the mean grain size of modified Fe3O4 nanoparticles decrease from 18.5 nm to 6.0-9.0 nm, and the saturation magnetization decreases, which attributes to the decrease of crystalline size and a non-magnetic covering layer coated on the surface of Fe3O4 nanoparticle. And surfactants greatly improve the dispersion of Fe3O4 nanoparticles.