Friction and wear behavior of chemically modified Sal (Shorea Robusta) oil for bio based lubricant application with effect of CuO nanoparticles

•Discussion of physicochemical properties of Sal oil with CuO nanoparticles as additives.•The Sal oil is epoxidized and CuO nanoparticles are added to the chemically modified oil.•The tribological analysis was performed on pin on disc machine at fixed operating conditions.•Improved frictional and an...

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