Epoxy Resin Nanocomposites Reinforced with in-Situ Stabilized Carbon Nanofibers (CNFs)

Carbon nanofibers (CNFs) suspended epoxy resin nanocomposites and the corresponding polymer nanocomposites are fabricated. The surface of CNFs is introduced an amine terminated functional groups via covalent bonding, which in-situ react with epoxy monomers. This in-situ reaction favors the CNFs dispersion and improves the interfacial interaction between CNFs and monomers. Effects of particle loading, surface treatment and operating temperatures of rheological tests on the complex viscosity, storage modulus and loss modulus are systematically studied. Unique rheological phenomena “a decreased viscosity with a better dispersion” are observed and explained in terms of the improved filler dispersion quality. Meanwhile, significant increase in the tensile property and storage modulus is observed and related to the better dispersion and the introduced strong interfacial interaction as revealed by SEM imaging. Finally, electrical conductivity is investigated and an unusual deficiency of surface treatment to improve the electrical conductivity is explained by an insulating coating layer.

References:

1) J. Zhu, S. Wei, A. Yadav and Z. Guo, Rheological Behaviors and Electrical Conductivity of Epoxy Resin Nanocomposites Suspended with In-situ Stabilized Carbon Nanofibers, Polymer, 51(12), 2643-2651 (2010)

2) J. Zhu, S. Wei, J. Ryu, M. Budhathoki, G. Liang and Z. Guo, In-Situ Stabilized Carbon Nanofibers (CNFs) Reinforced Epoxy Nanocomposites; Journal of Materials Chemistry, 20, 4937 - 4948 (2010)