Abstract
The present work was aimed to study the friction and wear behaviour of graphene nanoplatelets (GNPs) under extreme pressure conditions as an anti-weld additive for neem oil. The effect of neem oil, blended with various loading of GNPs on the friction and wear characteristics has been investigated. From the experimental results, it was found that 1 wt.% of GNPs in neem oil showed the least coefficient of friction and smoother wear scar diameter. The extreme pressure test was performed on neem oil with and without GNPs as per ASTM standards. The extreme pressure test results indicated the improvement in seizure load of neem oil by 27.8% at 0.5 wt.% of GNPs as compared to pure neem oil. Optical microscopy of worn steel ball surface revealed the pit formation and the formation of wedge cutting edge in GNPs modified neem oil.
Highlights
Owing to the ill effects of mineral and synthetic oils on the environment and human health and increasing oil demand and prices, the research objective was framed to pursue research on bio resources in the late 90’s and early 21st century [9,10,11]
One of the important properties of a lubricant is the viscosity, in the present research work; the focus is on the effect of loading of graphene nanoplatelets (GNPs) into the neem oil which results in change of viscosity
E stimulating point related to the amplified viscosity of GNPs-Neem oil (NO) nano-lubricants with 1.0 wt.% loading is that, for increasing temperatures, the viscosity of neem oil without GNPs had a substantial decrease
Summary
Neem oil (NO) was procured from NIE-Center for Renewable Energy and Sustained Technology, Mysore, India. e Graphene nanoplatelets (GNPs) were procured from Sigma Aldrich, Bangalore, India. e specifications of GNPs are, surface area 750 m2/g, the GNPs considered is structured out of 3–6 layers of
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