Simultaneous catalyzing and reinforcing effects of imidazole-functionalized graphene in anhydride-cured epoxies
Koh, Kwang Liang
Phua, Si Lei
Date of Issue2012
School of Materials Science and Engineering
In this study, an imidazole-functionalized graphene (G-IMD) was prepared from graphene oxide by a facile one-pot method. The functionalized graphene not only showed improved organic compatibility but also could simultaneously play the roles of a cure accelerator and reinforcement for anhydride-cured epoxies. Our results showed that G-IMD could successfully catalyze the curing reaction without the addition of any routine accelerator. Thermal and mechanical properties of the epoxy–G-IMD nanocomposites were systematically studied at different filler loadings. Compared with neat epoxy resin, tensile strength and Young's modulus of the nanocomposites were enhanced by 97% and 12%, respectively, at only 0.4 wt% G-IMD loading. Dynamic mechanical analysis and electron microscopic results revealed that the drastic improvements in mechanical properties could be attributed to the homogeneous dispersion of G-IMD and covalent bonding at the interface, which effectively improved the efficiency of load transfer between the matrix and graphene.
Journal of materials chemistry
© 2012 The Royal Society of Chemistry. This paper was published in Journal of materials chemistry and is made available as an electronic reprint (preprint) with permission of The Royal Society of Chemistry. The paper can be found at the following official DOI: [http://dx.doi.org/10.1039/C2JM32708B]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.