Fe_3O_4/PANI抗氧化水基磁流体的制备与表征

Preparation and Characterization of Fe_3O_4/PANI Anti-oxidation Water-based Nano-magnetic Fluid

在无氮气保护条件下，用化学共沉淀法制备了四氧化三铁（Fe3O4）纳米颗粒，并通过表面原位合成法将颗粒用聚苯胺（PANI）包裹，由此获得兼具磁性和导电性能的纳米四氧化三铁／聚苯胺（Fe3O4／PANI）材料。作者称其为Fe3O4／PANI抗氧化水基磁流体。透射电子显微镜（TEM）分析表明，该法制备的Fe3O4／PANI复合粒子的粒径在30-50nm，其分散性能比包裹前的Fe3O4粒子明显改善。红外光谱（FTIR）和X射线衍射（XRD）测试结果发现，Fe3O4粒子及Fe3O4／PANI复合粒子具有不同的物态和晶相结构。对纳米复合粒子的抗氧化性能和磁性能的检测证实，原位合成的Fe3O4／PANI复合粒子不仅能有效防止在空气中被氧化，还可在磁场环境中实现快速富集、定位，为Fe3O4／PANI纳米复合粒子在生物医学领域的应用提供了可能。

Nanosize Fe3O4 particles were prepared by the chemical co-precipitation method, without nitrogen protection;and the Fe3O4 nano-particles were coated by PANI through in-situ synthesis, then the Fe3O4/PANI material was prepared, which could also be called Fe3O4/PANI anti-oxidation waterbased nano-magnetic fluid. TEM resuhs showed that the size of such nano-magnetic fluid was 30 - 50 nm. The dispersion of such particles was much better than the naked Fe3O4 nano-particles. PTIR and XRD testing results showed that the naked Fe3O4 nano-particles and Fe3O4/PANI compound nanoparticles had a different physical state and crystal structure. The anti-oxidation and magnetism testing proved that Fe3O4/PANI compound nano-particles prepared in this method could both prevent oxidation effectively and be rapidly collected and located under magnetic field. This study provides the possibility of using F3O4/PANI compound nano-particles in bio-medical areas.