(133c) Magnetic Epoxy-Magnetite Nanocomposites

Magnetic Epoxy-Magnetite Nanocomposites

Hongbo Gu, Yudong Huang, Suying Wei and Zhanhu Guo

Magnetic epoxy resin nanocomposites reinforced with magnetite (Fe₃O₄)
nanoparticles (NPs) have been prepared with different nanofiller loading
levels. The surface functionality of the NPs was tuned by the introduced
conductive polyaniline (PANI) via surface initiated polymerization (SIP) method.
The rheological behaviors of the epoxy resin suspended with different NP
loadings were systemically investigated. The thermo-stability of these
cured epoxy nanocomposites was studied by thermogravimetric analysis
(TGA). The fracture surface was characterized by scanning electron microscope (SEM).
The mechanical properties were tested including tensile test and dynamic
mechanical analysis (DMA). The enhanced mechanical properties of the epoxy
nanocomposites filled with the functionalized NPs were observed in the tensile
test compared with the pure epoxy and its nanocomposites filled with
as-received NPs. The glass transition temperature (T_g) obtained from dynamic
mechanical analysis (DMA) and the magnetic properties were studied and will be
reported in this talk.