Evaluation of Polypyrrole Coating on Fe3O4 and Its Effect on Nanocomposite Properties


Magnetite (Fe3O4) nanoparticles were synthesized by chemical coprecipitation and were characterized using TEM, XRD, and VSM. XRD and TEM measurements indicate that the average particle size was approximately 10 nm. The nanoparticles were coated with polypyrrole using oxidative polymerization. TGA results show that the polypyrrole coating is 28.5wt%. TEM images indicate that the nanoparticles are bound in clusters by polypyrrole. Measurements show that nanoparticles may hinder curing of the polymer matrix, but they can be effective in producing composites with higher modulus and magnetic permeability at lower frequencies.

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S.L. would like to thank Dr. Iulica Zana for conducting the VSM measurements, Mr. Dave Maybury for assistance with permeability measurements, Ms. Yangyang Sun for DMA data collection, and Dr. Rina Tannenbaum for providing access to thermal analyses equipment.

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Correspondence to S. Liong.

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Liong, S., Harter, A., Moore, R. et al. Evaluation of Polypyrrole Coating on Fe3O4 and Its Effect on Nanocomposite Properties. MRS Online Proceedings Library 847, 210–216 (2004). https://doi.org/10.1557/PROC-847-EE13.34

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