Tribological Behaviour of Neem Oil with and without Graphene Nanoplatelets Using Four-Ball Tester

Table 1

Kinematic viscosity of various wt.% of GNPs-neem nano-lubricants.

Nano-lubricant formulations	Designation	Kinematic viscosity at 40°C (mm^2/s)
Pure neem oil	NO	53.3 ± 0.35
Neem oil mixed with 0.25 wt.% GNPs	0.25% GNPs-NO	55.5 ± 0.61
Neem oil mixed with 0.50 wt.% GNPs	0. 50% GNPs-NO	58.7 ± 0.19
Neem oil mixed with 0.75 wt.% GNPs	0.75% GNPs-NO	62.3 ± 0.53
Neem oil mixed with 1.0 wt.% GNPs	1.0% GNPs-NO	67.193 ± 0.4