High performance epoxy nanocomposites with enhanced thermal and mechanical properties by incorporating amine-terminated oligoimide-grafted graphene oxide

Abstract

In this work, thermal conductivity and mechanical strength of a commercial epoxy resin were improved by incorporating an amine-terminated oligoimide modified graphene oxide (ATO-GO). For this purpose, the surface of GO was modified with flexible/stable imide backbone and amine terminals. The ATO-GO was incorporated in epoxy proportion to prepare series of nanocomposites. The terminal amino group of ATO-GO also acted as curing moiety for epoxy resin leading to good interfacial compatibility and dispersion in the epoxy matrix resulting in improved properties. The epoxy resin was cured with hardener Aradur-22962 and ATO-GO separately and the results of curing behavior were compared with each other, which clearly showed the curing action of ATO-GO. In the prepared ATO-GO-epoxy nanocomposites, the filler enhanced the thermal conductivity, hardness and elastic modulus without decrease in thermal stability even at higher filler loading. In previous studies, it is reported that at higher GO, filler-loading properties like elastic modulus, hardness values, and glass transition temperature ( T g) were decreased. An enhancement of 59.5% in thermal conductivity was achieved for 5 wt% loading of ATO-GO filler as compared to neat epoxy. Along with this, thermal analysis revealed that the nanocomposites with 5 wt% filler loading have high T g and thermal strength. Nanoindentation results revealed that elastic modulus and hardness values enhanced by 104% and 147%, respectively, for the same nanocomposites. The enhanced thermal conductivity and good elastic behavior of the ATO-GO-epoxy nanocomposites demonstrated that these can be used as high-performance materials in electronic packing and electronic devices.

Fabrication and tribological behavior of MnO2/epoxy nanocomposites

“…12 Many researchers found that with the addition of nanomaterials in the epoxy matrix, the properties of neat epoxy were improved, and also the optimal loading of nanomaterials was necessary to improve the performance of epoxy-based nanocomposites for potential applications in automotive and aerospace parts fabrication, building materials, and fire-retardant materials. [13][14][15][16][17][18][19][20] Mihu et al found that the coefficient of friction of epoxy samples was increased with the sliding speed and applied force. The minimum coefficient of friction was obtained at the lower value of sliding speed and an optimum normal load of 5 N. 21 Kurahatti investigated the tribological behavior of nickel/ epoxy nanocomposites.…”

Epoxy-based ZnO nanocomposites in various configurations: Corona discharges and thermal transition studies

“…It has been possible due to their adaptability by incorporating reinforcing agents-particulate nano-micro fillers. These fillers include 6 alumina (Al 2 O 3 ), boron nitride (BN) magnesium oxide (MgO), clay, silica (SiO 2 ), titania (TiO 2 ), zinc oxide (ZnO), graphene, 7 graphene dioxide, 8 zirconium dioxide (ZrO 2 ), 9 manganese dioxide (MnO 2 ) 10 and many others. The addition of various nanofillers to epoxy resin has improved a variety of properties, including breakdown strength, treeing resistance, tracking/erosion partial discharge resistance, permittivity, glass transition temperature (T g ), thermal conductivity, and elasticity modulus.…”