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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (24): 2681-2685. 上一篇    下一篇

研究论文

导电聚苯胺与磁性CoFe2O4纳米复合物的制备与表征

苏碧桃* 左显维 胡常林 雷自强

  

  1. (西北师范大学化学化工学院 省部共建生态环境相关高分子材料教育部重点实验室 甘肃省高分子材料重点实验室 兰州 730070)

  • 投稿日期:2008-02-18 修回日期:2008-05-07 发布日期:2008-12-28
  • 通讯作者: 苏碧桃

Synthesis and Characterization of Conducting Polyaniline/Magnetic CoFe2O4 Nanocomposite

SU, Bi-Tao* ZUO, Xian-Wei HU, Chang-Lin LEI, Zi-Qiang   

  1. (Key Laboratory of Eco-Environment-Related Polymer Materials, Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070)
  • Received:2008-02-18 Revised:2008-05-07 Published:2008-12-28
  • Contact: SU, Bi-Tao

PDF

1377

被引次数

10

在利用HNO3酸化处理CoFe2O4磁性纳米粒子使其表面离子化、分散性得到改善的基础上, 采用原位聚合法制备了具有电磁功能的聚苯胺/CoFe2O4 (PANI/CoFe2O4)纳米复合物. 借助TEM, XRD, FT-IR, TG, 四探针电导率仪、VSM(振动样品磁强计)等分析手段研究了复合物的形貌、结构、热稳定性及电磁性能. 结果表明, 处理过的CoFe2O4磁性纳米粒子可形成分散均匀的PANI/CoFe2O4纳米复合物, CoFe2O4以25 nm左右的粒子分散于聚苯胺基体中; PANI与CoFe2O4之间存在化学键合作用, 正是这种作用使复合物热稳定性得以提高; 复合物同时具有导电性和磁性能, 且随CoFe2O4含量变化而变化.

关键词: 导电聚苯胺, CoFe2O4, 电磁功能的纳米复合物, 原位聚合, 表征

The CoFe2O4 magnetic nanoparticles were dealt with nitric acid to form an ionization surface and improve the dispersion property of CoFe2O4 nanoparticles greatly, then the polyaniline/CoFe2O4 (PANI/CoFe2O4) electromagnetic nanocomposites were synthesized by an in-situ polymerization method. The morphologies, structure, thermal stability, and electro-magnetic property of the PANI/CoFe2O4 nanocomposites were characterized by TEM, XRD, FT-IR, TG, four-probe and VSM techniques. The results indicated that well-dispersed PANI/CoFe2O4 nanocomposites were prepared by the in-situ polymerization of monomer An on the surface of treated CoFe2O4 nanoparticles and the magnetic nanoparticles with diameters of about 25 nm were dispersed in the base of PANI. The thermal stability of the PANI/CoFe2O4 nanocomposites was remarkably improved, due to formation of the bonding interaction between the CoFe2O4 and polyaniline in the composites. And the electro-magnetic properties of the nanocomposites changed with the content of the CoFe2O4.

Key words: conducting polyaniline, CoFe2O4, electromagnetic nanocomposite, in-situ polymerization, characterization