(59f) Preparation and Characterizations of Barium Ferrite/Epoxy Nanocomposites

Owing to the excellent physical, chemical properties and good processability, epoxy resin has been widely used in the adhesives, coatings, and aerospace. Recently, the materials miniaturization and light-weight demands the high performance for multifunctional epoxy resin.

With the rapid development of nano science and technology, nanocomposites have gradually occupied certain market share. Compared to the traditional materials, nanocomposite materials have unique physical and chemical properties. In this paper, barium ferrite nanoparticles were synthesized by citric acid sol-gel method. The polyaniline (PANI) was introduced via surface initiated polymerization method to improve the dispersion quality of nanoparticles within epoxy resin matrix. The X-ray diffraction analysis (XRD), FT-IR analysis data showed that PANI was successfully encapsulated on the surface of barium ferrite with the weight percentage of 12%. Finally, the epoxy nanocomposites with different loadings of nanoparticles were prepared. The results showed that the tensile strength of epoxy nanocomposites was obviously increased as the nanoparticle loading of 10 wt%. Relative to the pure epoxy resin, the tensile strength of unmodified barium ferrite/epoxy nanocomposite was increased by 2.8%, and for modified barium ferrite/epoxy nanocomposite increased by 12.2%.

Based on the experiments and data analysis, it’s found that the PANI was favorable to the barium ferrite nanoparticles dispersion within epoxy matrix and provided epoxy with the enhanced mechanical property. In addition, these epoxy nanocomposite exhibited the good magnetic, dielectric properties and improved thermal stability.

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