Improving the lubricity of a bio-lubricating grease with the multilayer graphene additive

Abstract The natural wax separated from the agro-waste resource is a feasible and sustainable biolubricant. Investigation on the lubrication behaviors of this new renewable lubricant is attractive. In this work, a multilayer graphene was introduced into a wax obtained from the non-medicinal part of Codonopsis pilosula for the purpose of the lubricity improvement. A reciprocating ball-on-disc configuration and AISI 52100 self-mated sliding-pairs were selected for tribological evaluation. The results indicated that the addition of multilayer graphene improves the load-carrying capacity and high temperature lubricity of the natural wax.