Influence of the Addition of Nano-porous Graphite/Parafffin Additive on the Wear Properties of Phenol-Formaldehyde Resin Composites

Abstract

Phenol-formaldehyde resin (PF) composites with a nano-porous graphite additive (NPGA) in various contents were fabricated and the wear behaviors under low and high sliding speeds were studied. The addition of NPGA significantly improved the wear resistance of the PF. The specific wear rates of PF composites under low sliding speed first decreased with increasing NPGA and then slightly increased when the NPGA content surpassed 15 wt%; the specific wear rate of the composite with 15 wt% NPGA was reduced by 77% compared with the neat PF. Under high sliding speed the specific wear rates of the composite material decreased continuously with increasing NPGA content and the maximum wear resistance of the composite with 20 wt% NPGA was more than 12 times that of the neat phenolic resin. The results are attributed to the combined effects of load-capacity and the lubrication role of the included NPGA. The surface morphology of the worn surface was characterized, and the wear mechanism for the composites is discussed.

Keywords:

• Wear resistance
• phenol-formaldehyde resin
• nano-porous graphite lubricant

Additional information

Funding

Financial supports of this work were provided by the National Natural Science Foundation of China (51675162, U1604130, U1704144), Research Project of Henan Province (2015GGJS-051) and Student Research Training Program of Henan University of Science and Technology under Grant (2018142).