Evaluation of Tribological Performance of Jatropha Oil Modified With Molybdenum Disulphide Micro-Particles for Steel–Steel Contacts

Abstract

<jats:title>Abstract</jats:title> <jats:p>Crude oil reserves are sapping with time, therefore researchers have considerably shifted their focus to bio-lubricants which can be surrogated for petroleum based lubricants. The objective of the present research was to cater an idea to the researchers about the lubricating potentials of Jatropha oil (JO). The study was performed using Reciprocating Friction Monitor (RFM) machine having ball-on-flat arrangement with 52100 chromium steel ball and EN-31 steel as tribo-pair. The experiments were conducted at three different loads at a temperature of 40°C. JO was mixed with glycerol (G) and different percentages of molybdenum disulphide (0.5%, 1%, 2% and 3%) micro-particles to prepare a lubricant. The friction and wear of the tribo-pair was assessed in presence of these mixtures. The results revealed that MoS2 micro-particles were effective in reducing both friction and wear, with minimum friction recorded at 2% MoS2 concentration. The coefficient of friction (COF) was reduced by 18–52% by the addition of MoS2 as compared to the base JO. The results showed that JO has better lubrication ability as compared to the commercial lubricant SAE 10W/30. The experimental results were substantiated by examinations of tribo-pairs on scanning electron microscope, optical microscope and optical 3D profilometer. The results were found to be in close agreement with each other. It was concluded that the blend (80% JO + 20% G + 2% MoS2) is a strong candidate that can be used in place of mineral oils as a lubricant.</jats:p>

Tribological properties of MoS2 particles as lubricant additive on the performance of statically loaded radial journal bearings

“…All experiments were carried out using the base engine oil (Shell Tellus 10) and by adding 1% by weight Molybdenum Disulfide (MoS2) to the base engine oil at the flow rate of 55 cm 3 /min. The optimum mixture of nanoparticle was determined according to the results obtained from studies in the literature [21][22][23]. Accordingly, molybdenum disulfide was added to the oil at 1% wt.…”

Physico-chemical and tribological properties of commercial oil – bio-lubricant mixtures dispersed with graphene nanoplatelets

“…These results also show that two crucial properties, (1) the polyol-ester structure and (2) the extent of the fatty acid chain, affect the tribological properties under boundary lubrication conditions. Other researchers [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] also suggested that these deciencies can be overcome by dispersing various additives such as nanoparticles, tribological improvers, and friction modiers. One of these nanomaterials is graphene nanoplatelets, an exceptional tribological performance additive.…”

“…Engine oil is crucial in automobiles to prevent heat and corrosion due to friction. Several studies 1–37 explored the commercial use of biobased oils. Ting and Chen 34 proposed the possibility of producing new lubricants with esters from seed oils, thus minimizing toxicity and improving the biodegradability of engine oils over time.…”

“…The former can probably replace mineral and synthetic oils when blended with commercial oils because the chemical structure of commercial oils and bio-lubricants is similar. Few studies 1–30 have highlighted the potential of bioester-based lubricants as a supplement to lubricants. However, extensive efforts have been made to find a suitable replacement to petroleum-based oils in IC engines.…”

Exploring the Anti-Wear and Extreme Pressure Lubricating Performance of Jatropha Oil Modified With Nano-Additives and Garlic Oil

“…Jatropha oil has staggering tribological potential, and it has been proved to be a viable option to replace mineral oils by numerous studies. The lubricating properties of jatropha oil have been improved by adding various types of additives (Mushtaq & Hanief, 2021b, 2021a, 2021cTalib et al, 2019Talib et al, , 2021. There are a number of different types of additives available which can enhance the performance of base lubricants, and care needs to be taken in selecting the best and most suitable one.…”