Tribological behavior as lubricant additive and physiochemical characterization of Jatropha oil blends

Friction, Dec 2015

This investigation reports on the effect of Jatropha oil doped with lube oil on tribological characteristics of Al-7%Si alloy. The factors involved were Jatropha oil percentages, sliding velocities and load which was optimized for weight loss, friction coefficient and specific wear rate characteristics. The conventional lubricant was SAE 40. It is observed that the Jatropha oil percentage factor had significant influence on the weight loss, friction coefficient and wear rate of the pin. The optimum result was A 2 B 3 C 1 for pin weight loss, friction coefficient and wear rate. From the experimental result, it is found that the wear scar diameter increases with the increase of load for lube oil and reduced by addition of percentage of Jatropha oil. Flash temperature parameter was also studied in this experiment and results show that 15% addition of Jatropha oil would result in less possibility to film breakdown. The overall results of this experiment reveal that the addition of 15% Jatropha oil with base lubricant produces better performance and anti-wear characteristics. This blend can be used as lubricant oil which is environment friendly in nature and would help to reduce petroleum based lubricant substantially.

A PDF file should load here. If you do not see its contents the file may be temporarily unavailable at the journal website or you do not have a PDF plug-in installed and enabled in your browser.

Alternatively, you can download the file locally and open with any standalone PDF reader:

https://link.springer.com/content/pdf/10.1007%2Fs40544-015-0095-1.pdf

Tribological behavior as lubricant additive and physiochemical characterization of Jatropha oil blends

Friction 2223-7690 Tribological behavior as lubricant additive and physiochemical characterization of Jatropha oil blends Yashvir SINGH 0 0 Department of Mechanical Engineering, College of Engineering Studies, University of Petroleum and Energy Studies , Dehradun 248007, India Received: 02 September 2015 / Revised: 13 November 2015 / Accepted: 18 November 2015 © The author(s) 2015. This article is published with open access at Springerlink.com This investigation reports on the effect of Jatropha oil doped with lube oil on tribological characteristics of Al-7%Si alloy. The factors involved were Jatropha oil percentages, sliding velocities and load which was optimized for weight loss, friction coefficient and specific wear rate characteristics. The conventional lubricant was SAE 40. It is observed that the Jatropha oil percentage factor had significant influence on the weight loss, friction coefficient and wear rate of the pin. The optimum result was A2 B3 C1 for pin weight loss, friction coefficient and wear rate. From the experimental result, it is found that the wear scar diameter increases with the increase of load for lube oil and reduced by addition of percentage of Jatropha oil. Flash temperature parameter was also studied in this experiment and results show that 15% addition of Jatropha oil would result in less possibility to film breakdown. The overall results of this experiment reveal that the addition of 15% Jatropha oil with base lubricant produces better performance and anti-wear characteristics. This blend can be used as lubricant oil which is environment friendly in nature and would help to reduce petroleum based lubricant substantially. Taguchi; ANOVA; pin weight loss; friction coefficient; wear rate - Around the globe, there are challenges for the industries involved in manufacturing petroleum based lubricant products to face government regulations and also meet latest technological changes to make cleaner environment and reduce pollution caused by them [ 1, 2 ]. There are various lubricants available around the world which include synthetic oil, mineral oil and vegetable oil. Lubricants available in the market, i.e., mineral oil are derived from crude petroleum oils and are not feasible with the environment as they are non-biodegradable and toxic [ 3, 4 ]. Also, the disposal of mineral caused pollution to the aquatic and terrestrial ecosystems and combustion of the mineral oil leads to emission of metal traces like calcium, zinc, magnesium and phosphorous and nano-particles [ 5, 6 ]. Vegetable oil can be used as an alternative to petroleum based mineral oil as it possesses several advantages which include biodegradability, lower toxicity, lower volatility and higher lubricity [ 7, 8 ]. They have triacylglycerol structure which contains long, polar fatty acid composition resulting into formation of thick film between the metal to metal contacts and imparting them better anti wear properties [ 9, 10 ]. There are some drawbacks of vegetable oil based lubricants that they have lower thermal/oxidative stability, higher flash point and high temperature operability leading to higher coefficient of friction [ 11 ]. To overcome these limitations, several researches have been carried out. Oxidation stability and low pour point can be modified by partially adding additives and using N-Phenyl-alpha-naphthylamine (Am2) as antioxidant to improve oxidation stability [ 12−14 ]. Moreover, transesterification or epoxidation are the solutions to meliorate oxidation stability at low temperature [ 15, 16 ]. To make vegetable oil based lubricant sustainable, there is a need to improve their narrow range of viscosities [17]. Viscosity is one of the significant factor in determining coefficient of friction between the sliding surfaces as it acts as protective film between the surfaces in contact to protect them from wear. To do so, viscosity modifiers can also be used which are friendly with environment. Oleogels based on conventional, bio-based lubricant and ethylene-vinyl acetate (EVA) copolymer have been developed. It has been observed that EVA can be used as an effective thickener agent to make vegetable oil as bio-based lubricant [ 18 ]. Viscosity of bio-based lubricant can also be increased by using ethylene-vinyl acetate and styrene-butadienestyrene copolymers as they increase some amount of kinematic viscosities at 40 °C and 100 °C [ 19 ]. Taguchi’s orthogonal array method is a statistical technique under design of experiments which reduces number of experiment trials and provides sufficient information about the effect of control factors [ 20, 21 ]. According to this method, various control factors can be investigated at a time and resulted in optimum significant values. The advantages of using Taguchi method have been reported by various authors [ 22−27 ]. The following is the overview of the literature based on involvement of lubricants using design of experiments. Silica (...truncated)


This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1007%2Fs40544-015-0095-1.pdf

Yashvir Singh. Tribological behavior as lubricant additive and physiochemical characterization of Jatropha oil blends, Friction, 2015, pp. 320-332, Volume 3, Issue 4, DOI: 10.1007/s40544-015-0095-1