摘要
以化学沉淀法制备Fe3O4纳米粒子,采用乙醇对Fe3O4纳米粒子表面进行处理,使其表面有机化,然后通过乳液原位复合制备Fe3O4/聚吡咯复合材料。利用TEM,XPS,四探针测试仪和震荡磁力计对其进行表征和检测。结果表明:经醇处理的Fe3O4纳米粒子的分散性得到明显改善,Fe3O4纳米粒子被包覆在聚吡咯层内,包覆层厚度为10nm左右,复合材料具有优良的电性能和磁性能,电导率σ=7.69s/cm～13.6s/cm,饱和磁强度Ms=12.06emu/g～24.38emu/g,矫顽力Hc=11Oe～41Oe。其环境稳定性明显优于纯聚吡咯。
Fe3O4 nanoparticles were prepared by a precipitation method. The Fe3O4 nanoparticles were dealt with ethanol to form an organic surface. Then polypyrrole composite was polymerized by the emulsion polymerization method in the presence of these Fe3O4 nanoparticles. The structural characterization by TEM, XPS, and AAS proved that the dispersion of Fe3O4 nanoparticles dealt with alcohol was better than that of naked ones. Fe3O4 nanoparticles were entrapped or encapsulated in the PPy chain. The thickness of the PPy layer was about 10 nm. The Fe3O4/PPy composites showed electrical and ferromagnetic property (σ=7.69 s/cm-13.6 s/cm, Ms=12.06 emu/g-24.38 emu/g, Hc=11 Oe-41 Oe). The environmental stability of composites was better than that of PPy.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2004年第2期157-160,共4页
Acta Materiae Compositae Sinica
关键词
复合材料
导电性
导磁性
聚吡咯
FE3O4纳米粒子
Electric properties
In situ processing
Iron oxides
Magnetic properties
Nanostructured materials
Polypyrroles
