Vegetable Oil Essay

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In manufacturing industries, lubricants are being used extensively as it plays important roles in the machining process. The function of lubricants in machining processes acts as a coolant where it lubricates the tool-workpiece interface to reduce friction at low cutting speed or high cutting speed. Furthermore, lubricant consequently helps to prolong the machine tool life. Thus, to ascertain the suitability of vegetable oils as lubricants, the properties of vegetable oils will be analysed. 2.1 EXCELLENT LUBRICITY Vegetable oils are divided into two broad chemical categories which are triesters and monoesters (Biresaw et al., 2003). However, most of the properties of vegetable oils such as corn, soyabean, canola, sunflower, and peanut oil are triesters that consist triglycerides. Triglycerides are esters of glycerol molecules with…show more content…
(Biresaw et al., 2003) additionally states that the major factor that affecting the boundary friction properties of lubricant ingredients would be the free energy adsorption (ΔGads). The free energy adsorption (ΔGads) identifies as the abilities of the liquid to adsorb onto surface friction and obviate contact between two surfaces during tribological process. Therefore, investigation of the free energy adsorption (ΔGads) was conducted by utilising the Langmuir and Temkin friction-derived adsorption isotherm models. The Friction of each solute, which is the combination of Hexadecane with different types of vegetable oils, was first measured by utilising ball-on-disc configuration and then the coefficient of friction was automatically calculated. From the coefficient of friction, the relationship between the boundary coefficient of friction of solute and its solution concentration were acclimated to obtain the adsorption isotherms. The friction-derived adsorption results for each vegetable oils are shown in graph

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