Abstract
Functionalized graphene/epoxy composites were prepared using the epoxy resin diglycidyl ether of bisphenol A. Graphene oxide (GO) and Al(OH)3-coated graphene (Al-GO) fillers were fabricated using the Hummers method and a simple sol–gel method, with aluminum isopropoxide as the aluminum precursor. X-ray photoelectron spectroscopy verified the successful formation of functional groups onto the GO and Al-GO. The dispersion of functionalized graphene fillers showed an even distribution within the epoxy resins. A dynamic mechanical analysis was used to investigate the changes in the mechanical properties of the epoxy composites, which included neat epoxy and epoxy with various concentrations of graphene-based fillers. The storage modulus and tanδ graphs illustrate the enhancement achieved by increasing the amount of filler. The composite with 3wt.% GO had the highest storage modulus and glass transition temperature. The thermal conductivities of the composites with graphene-based fillers were enhanced compared to those without fillers. The 3wt.% GO/epoxy composite had the highest thermal conductivity, which was nearly twice that of the neat epoxy resin.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call