Synergistic lubricating behaviors of Zn-MOF/[P88814]DEHP composite used as lubricating oil additive

AbstractAbstractUse of the synergistic effect between nanomaterials and ionic liquids is of great significance for designing high-performance lubricating materials. In this work, Zn-MOF/[P88814]DEHP (zinc complexes with 2-aminoterephthalic acid nanosheets/trioctyltetradecylphosphonium bis (2-ethylhexyl) phosphate) composites were successfully synthesized by grinding the mixture of [P88814]DEHP and Zn-MOF with different mass ratios and evaluated as a new kind of the white oil additive using a four-ball testing machine. Results demonstrate that the optimal mass ratio of Zn-MOF to [P88814]DEHP was 1:1 and the Zn-MOF/[P88814]DEHP composite with 2.0 wt% addition amount into the white oil significantly reduced friction coefficient and wear. Such obvious friction-reducing and outstanding anti-wear properties of Zn-MOF/[P88814]DEHP composite could be attributed to the synergistic lubrication between Zn-MOF and [P88814]DEHP. This work investigated the synergistic lubrication between MOFs and ILs, which provided a new idea for designing and preparing new lubricating oil additives.Keywords: 2D MOFionic liquidlubricating additivessynergistic lubricationtribological properties AcknowledgmentsThis work supported by the National Natural Science Foundation of China (52205199), the Discipline Project of Ningxia (NXYLXK2017A04) and the Fourth Batch of Ningxia Youth Talents Supporting Program (TJGC2019004).Disclosure statementThe authors declare that they have no competing financial interesting.