Oleylamine/graphene-modified hydrotalcite-based film on titanium alloys and its lubricating properties

A novel structured hydrotalcite-based film was synthesized on TC4 titanium alloy by facile hydrothermal method, and then modified with graphene and oleylamine. The structure, morphology, composition, wetting and lubricating properties of the as-prepared films were investigated. The oleylamine/graphenemodified hydrotalcite-based film (HT-OAm/GN) exhibited lower friction coefficient and longer wear life. The enhancement of wear properties was attributed to the synergistic effects of the hard and lubricating graphene layer and oleylamine molecules. (C) 2017 Elsevier B.V. All rights reserved.