Preparation of multi-core/single-shell OA-Fe3O4/PANI bifunctional nanoparticles via miniemulsion polymerization
Preparation of multi-core/single-shell OA-Fe3O4/PANI bifunctional nanoparticles via miniemulsion polymerization
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DOI：
10.1016/j.colsurfa.2011.05.031
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
Hua Wang;Ruoxi Wang;Lei Wang;Xingyou Tian
中科院分区：
文献类型：
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作者：
Hua Wang;Ruoxi Wang;Lei Wang;Xingyou Tian
通过一种新颖、简便的原位细乳液聚合方法制备了具有多核/单壳结构的导电磁性油酸修饰的Fe3O4(OA-Fe3O4)/聚苯胺纳米粒子。由于细乳液聚合独特的单体液滴成核机理，确定了苯胺在Fe3O4粒子表面的主要聚合轨迹。油酸(OA)对Fe3O4的改性在包覆过程中起着重要的作用，不仅降低了Fe3O4的团聚程度，而且有利于Fe3O4与PANI之间形成氢键，从而增强了界面的结合。纳米复合材料的导电性和饱和磁化强度可以通过添加适量的OA-Fe3O4来调节。该方法可推广到制备其他磁性/导电核壳复合材料，这些独特的核壳球形材料可应用于催化剂载体或生物医学领域。
Conductive and magnetic oleic acid modified Fe3O4(OA-Fe3O4)/polyaniline nanoparticles with multi-core/single-shell morphology had been synthesized via a novel and facile in situ miniemulsion polymerization approach. The dominant polymerization loci of aniline at the surface of Fe3O4particles were ensured owing to the unique monomer droplet nucleation mechanism of miniemulsion polymerization. Modification of Fe3O4by oleic acid (OA) played an important role in the coating process, which not only decreased the agglomeration degree of Fe3O4, but also favored the generation of hydrogen bonding between Fe3O4and PANI thus enhance their interfacial combination. The conductivity and saturated magnetization of the nanocomposites could be tuned by the addition amount of OA-Fe3O4. The present method can be extended to fabricate other magnetic/conductive core/shell composites, and these unique core/shell spherical materials could find applications in catalyst supports or biomedical areas.