Nano-hybridization effects of nano-silica and nano-graphene platelet on mechanical properties of E-glass/epoxy nanocomposites

Abstract

This study reveals the nano-hybridization effects of nano-graphene platelets (NGPs) and nano-silica (SiO2 nanoparticle), having different structural geometries on the mechanical properties, nano and micro-scale failure behaviors, and nanoscale fracture mechanisms of E-glass/epoxy composites. Tensile, three-point bending, and Charpy impact experiments were applied to determine the mechanical behaviors of 0.5 wt.% NGPs, 4 wt.% nano-silica and 0.5 wt.% NGPs + 4 wt.% nano-silica nanohybrid filled E-glass/epoxy and neat E-glass/epoxy composite samples. Failure of composite samples was examined by microscopy and SEM analysis. FTIR analyses were conducted to interpret the chemical and physical interactions between the nanoparticles and epoxy resin. Nano-hybridization exhibited the highest tensile strength and three-point flexural force for the composite samples. However, the NGPs filled nanocomposites also exhibited the best static tensile toughness and impact energy absorption. The experimental data showed that it was statistically significant as a result of the one-way ANOVA analysis. Remarkably, nano-hybridization of nano-silica and NGPs showed different fracture mechanisms at the nano and micro-scales.

Influence of nano graphene addition on mechanical properties of Bi-directional carbon fabric based epoxy composites

“…Further, the treated (acid-modified sized) carbon fibre facilitates adhesion with the epoxy matrix. Similar observations have been made by Yang et al 31 and Agrawal et al 32 The study conducted by Aydogus et al 33 on a similar nano system containing E glass with nano graphene platelets and nano-silica incorporation to epoxy has been proved to be a successful development. The nano hybridization effect of increased nano concentration in both NGP and nanographene and silica hybrid additions showed the highest tensile strength and flexural strength for the highest concentrations.…”

“…In the present work, superior mechanical properties have also been obtained for the epoxy carbon fiber based on a graphene addition of 0.8 wt%. Thus the information on the research findings 33,34 and the present work are in agreement with each other.…”

“…Compared to unfilled composites, the nanofillers added comparably have indicated better tensile properties. Thus the above literature results 33,34 have highlighted the importance of filler addition in the polymer matrix for enhanced mechanical properties. In the present work, superior mechanical properties have also been obtained for the epoxy carbon fiber based on a graphene addition of 0.8 wt%.…”

Investigation of low‐velocity impact behavior of aluminum honeycomb composite sandwiches with GNPs doped BFR laminated face‐sheets and interfacial adhesive for aircraft structures

“…It is considered that these toughening mechanisms increase the impact resistance by retarding the progression of cracks and increasing the load transfer. [ 8,29,49,63–66 ]…”

“…Demirci and Aydoğuş [ 49 ] compared the mechanical properties of GNPs, nano‐silica and nano‐hybridizations with each other in their studies. The best results for Charpy impact resistance were obtained at 0.5%wt.…”