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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30~50 nm,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。
Under the condition of no nitrogen protection, the Fe3O4 nanoparticles were prepared by chemical coprecipitation and the particles were coated with polyaniline (PANI) via surface in-situ synthesis to obtain both magnetic and electrical conductivity Of nano-Fe 3O 4 / polyaniline (Fe 3 O 4 / PANI) material. The authors call it Fe3O4 / PANI antioxidant water-based magnetic fluid. Transmission electron microscopy (TEM) analysis showed that the particle size of Fe3O4 / PANI composite particles prepared in the method was between 30 and 50 nm, and its dispersibility was significantly improved than that of the Fe3O4 particles before encapsulation. The results of FTIR and XRD show that Fe3O4 particles and Fe3O4 / PANI particles have different states and crystal structures. The anti-oxidation and magnetic properties of nano-composite particles confirmed that in-situ synthesis of Fe3O4 / PANI composite particles can not only be effectively prevented from being oxidized in the air, but also in the magnetic field environment to achieve rapid enrichment, positioning, Fe3O4 / PANI nano-composite particles in the field of biomedical applications may provide.