Finiteness of global crude oil reserve, increasing crude oil prices and problems
related to environment seems to be a reality check for the issues of emerging generation.
Vegetable oil-basedlubricants are an attractive alternate to conventional petrol-based
lubricants due to number of its physical properties like renewability, biodegradability,
high lubricity and high flashpoint. Direct application of vegetable oil as vehicle lubricants
is less favorable due to its poor thermo oxidative stability, cold flow behavior and poor
anti-ware characteristic. Present research detailed in this document refers to chemical
modification of custard apple seed oil through epoxidation, hydroxylation and trans
esterification process to improve its thermo-oxidative stability and cold flow behavior. The
CuO nanoparticle of size 30-50nm was dispersed in this chemically modified custard
apple seed oil in three different concentration (0.1 wt.%, 0.5 wt.% and 1 wt.%) as an antiwear additive using ultrasonicator. Then the tribological properties was tested with and
without CuO nanoparticle using four ball tribometer. It is found that coefficient of friction
and wear characteristics was optimum with 0.5 wt.% CuO nanoparticle dispersed in
Chemically Modified Custard Apple Seed Oil (CMCASO).