Fe<sub>3</sub>O<sub>4</sub>/ 聚吡咯复合材料的制备及表征

Fe₃O₄/ 聚吡咯复合材料的制备及表征

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10 nm 左右, 复合材料具有优良的电性能和磁性能, 电导率e= 7. 69 s/ cm～13. 6 s/ cm, 饱和磁强度M_s= 12. 06 emu/ g～24. 38 emu/ g, 矫顽力H_c= 11 Oe～41 Oe。其环境稳定性明显优于纯聚吡咯。

Abstract: 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( e= 7. 69 s/ cm～13. 6 s/ cm, M_s= 12. 06 emu/ g～24. 38 emu/ g, H_c= 11 Oe～41 Oe) . The environmental stability of composites was better than that of PPy.