Journal
COATINGS
Volume 8, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/coatings8030091
Keywords
polymer coating; graphene; tribological properties; elevated temperature
Categories
Funding
- National Natural Science Foundation of China [51605381]
- China Postdoctoral Science Foundation [2017M613171]
- Shaanxi Provincial Education Department [16JK1540]
- Natural Science Fund Plan of Shaanxi Province [2017JQ5101]
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To improve the tribology properties of the polymer coating under elevated temperature, the epoxy coating was reinforced with nano graphene. The micro-hardness, heat conductivity, and thermo-gravimetric properties of the coating were enhanced as filled graphene. The friction and wear properties of the polymer coating were studied using a pin-on-disc tribo-meter under room and elevated temperatures. The results showed that under room temperature, the friction coefficient and the wear rate of the coating adding 4.0 wt % graphene was 80% and 76% lower than that of the neat epoxy coating, respectively. As the test temperature increased, the friction coefficient of the graphene/polymer coatings decreased at first and then slightly increased. The friction coefficient was at its lowest value under 150 degrees C and then increased as the temperature rose to 200 degrees C. By adding 4.0 wt % graphene, the friction coefficient and wear rate of the polymer coating were further reduced, especially at elevated temperatures.
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