Life Science Journal 2013;10(8s) http://www.lifesciencesite.com http://www.lifesciencesite.com lifesciencej@gmail.com 110 Investigation of Physical Properties for Jatropha Oil in Different Temperature as Lubricant Oil Iman Golshokouh 1,2 *,Mohamadali Golshokouh 3 , Farid Nasir Ani 2 , Ehsan Kianpour 2 , S. Syahrullail 2 1 Faculty of mechanical engineering, Iezhe Azad university of Iran 2 Faculty of Mechanical Engineering,Universiti Teknologi Malaysia,81310, UTM Skudai, Johor 3 Faculty of mechanical engineering, Dezful Azad university of Iran golshokooh@yahoo.com Abstract: The purpose of this research is to investigate physical properties of Jatropha oil for find new, clean and renewable source of lubricant oil. In this study examines the experimental result of anti-friction, anti-wear, flash temperature parameter (FTP) and viscosity index (VI) for Jatropha oil. The experiments are performed with standard test method ASTM D 4172 and using a four ball tribotester, CCD Camera, digital microscope and viscosity meter. This experiment was carried out in various temperatures, 55, 75, 95, 105 and 125 °C, load 392 N, speed 1200 rpm and in 60 minutes. All results of Jatropha oil were compared with hydraulic oil as mineral commercial oil with based lubricant to evaluate the lubricant ability of Jatropha oil. Results show that Jatropha oil had higher lubricant ability versus friction and wear than engine and hydraulic oil based- lubricant. [Iman golshokouh, mohamadali golshokouh, Farid Nasir Ani, ehsan kianpour, S. Syahrullail. Investigation of Physical Properties for Jatropha Oil in Different Temperature as Lubricant Oil. Life Sci J 2013;10(8s):110- 119] (ISSN:1097-8135). http://www.lifesciencesite.com . 14 Keywords: Jatropha oil, four-ball tribotester, wear scar diameter, Friction, flash temperature parameter 1. Introduction Friction and wear are two harmful phenomena in many of industrial applications and car engine. For example, friction is caused to west useful energy by prevent from sliding motion between contact parts or produce heat of different parts. The best solution of this problem is using from lubricant oil. Lubricant oils are able to reduce or remove friction and wear between contact parts. Lubricant oil is one of the important products from mineral oil and round 80% of all lubricant oil in the world product from mineral oil. But, mineral oils are the main sources that can increase the environmental pollution in the world. This increasing is harmful for humans, animals and plants. Many research indicate that the main sources for environmental pollution is mineral oil and other derivatives (Mercurio et al., 2004, Grant et al., 2008, Bartz, 1998, Nadkami, 2004). In recent years were done many researches to find new alternative source of lubricant oil. Vegetable oils are the alternative sources for replacing with mineral oil; these kind of oils are renewable, cheap, nontoxic, clean and environmental friendly(Randles, 1992, Battersby et al., 1992). In recent decade was investigated some kind of vegetable oil such as palm oil, sunflower oil, soya been oil and rapeseed oil of replace with mineral oil and derivation it such as hydraulic liquid and lubricant oil(Adhvaryu et al., 2005, Husnawan et al., 2007, Wan Nik et al., 2005). Maleque investigated the effects of friction and wear of blended palm oil methyl ester lubricant with tribological properties and showed that at lower load and temperature, the wear rate using palm oil methyl ester lubricant was low, under 5%, but in higher loads, the wear rates will be increase(Maleque et al., 2000). Masjuki did a number of researches on the palm oil and mineral oil with based commercial lubricating oil for the use in engine and compare friction, wear, viscosity, lubricant degradation and exhaust based on the same experimental conditions (Masjuki. H. H, 1999). Wan Nik has done some experiment about conversion palm oil to hydraulic oil (Wan Nik et al., 2005). Much research has been done about the physical and chemical properties of vegetable oils. Also some of these researches confirmed that vegetable oil can be replaced instead mineral oil (Castro et al., 2005, Gawrilow, 2003, Aluyor and Ori-Jesu, 2010, Adhvaryu et al., 2006, Kuliev et al., 1995). Jatropha oil was introduced as new vegetable oil in recent years. Jatropha oil collected from the Jatrophaseeds with extract method and find in different origins such as Malaysia, Indonesia and Thailand. Some physicochemical properties for Jatropha oil were evaluated. Emil and Yaakob with using gas chromatography (GC) show that, linoleic acid (28.8– 34.6%) and oleic (42.4–48.8%) are the dominant fatty acids present in the Jatropha seed oil and also The saturated fatty acids such as palmitic and stearic acid lie in the range 13.25–14.5 and 7–7.7%, respectively more than it, the observed major triacylglycerol (TAG) composition was OOL (22.94– 25.75%) and OLL (15.52–20.77%) (Emil Akbar, 2009). There are little researches about Jatropha oil as lubricant until now. Jatropha oil was investigated as additive material in mineral oil to increase lubricant ability; different percentage of Jatropha oil