Tribological characterization of graphene nanoplatelets/alumina particles filled epoxy hybrid nanocomposites

Abstract

In this work, graphene nanoplatelets have been synthesized using liquid phase exfoliation of graphite flake powder. The exfoliated graphene nanoplatelets were identified and characterized by using UV–Visible–NIR spectroscopy, High resolution transmission electron microscopy, electron diffraction, scanning electron microscopy and X‐ray diffraction. The obtained graphene nanoplatelets and nano alumina at various weight ratios were dispersed in an epoxy matrix to enhance the surface roughness (Ra), micro hardness (Hv) and coefficient of friction (CoF) of epoxy hybrid nanocomposites. The results showed that the Ra and CoF value for the combined loading of 0.2 wt% of graphene nanoplatelets and 0.8 wt% of alumina into the epoxy was decreased to 41.02 and 20.01% whereas, the Hv value was increased to 10.04% when compared with the neat epoxy. The improved mechanical and tribological behaviors are suitable for the applications bearing and coating.

Investigation of physical, flexural, and dynamic mechanical properties of alumina and graphene nanoplatelets filled epoxy nanocomposites

“…These types of dispersion procedures are required because they promote the dispersion of nanofillers from an agglomerated state to a homogeneous state. The most commonly used dispersion methods are sonication, [ 39,40 ] three roll milling, [ 41 ] planetary mixer, [ 42 ] mechanical stirring and sonication, [ 43 ] magnetic stirring and ball milling [ 44,45 ] and planetary centrifugal mixing and three‐roll milling. [ 46 ]…”

“…These types of dispersion procedures are required because they promote the dispersion of nanofillers from an agglomerated state to a homogeneous state. The most commonly used dispersion methods are sonication, [39,40] three roll milling, [41] planetary mixer, [42] mechanical stirring and sonication, [43] magnetic stirring and ball milling [44,45] and planetary centrifugal mixing and three-roll milling. [46] From the above studies, it was observed that the combined effect of the low-filler concentration of alumina nanoparticles and the graphene nanoplatelets for the improvement of physical and mechanical properties of the composites were not yet reported.…”

Effect of stacking sequence and silicon carbide nanoparticles on properties of carbon/glass/Kevlar fiber reinforced hybrid polymer composites

“…Synthetic fibers are known for its light‐weight and considerable stiffness. [ 1–3 ] Future trends are focusing on hybrid composite materials with nanoparticles as filler material that can replace traditional materials used in industries. [ 4 ] A detailed study on relevant literature reveals the proper material selection and research gap to develop hybrid polymer composites with synthetic fibers as reinforcement with suitable filler material that can enhance the mechanical properties.…”

Improvements of the structural, thermal, and mechanical properties of structural adhesive with functionalized boron nitride nanoparticles

“…The studies concluded that mechanical, thermal, and structural properties of epoxy adhesives were improved based on the type of the reinforced particles. [4][5][6][7][8] Apart from these common particles, the use of various boron compounds such as boron nitride (BN) has gained importance in recent years. 9 BN, which has a two-dimensional and sp 2 configuration, is highly similar to graphite in terms of its structure, and to graphene in terms of its allotropic form.…”