2D Mo<sub>2</sub>CT<sub>x</sub> Reinforced Polyimide Nanocomposites for Enhancement of Surface Tribological Performance at Elevated Temperatures
Haonan Li, Libo Wang, Liang Li, Li Han, Yahui Dai, Qianku Hu, Aiguo Zhou, Xuqing Liu
Abstract
Abstract In order to improve the high‐temperature friction and wear properties of polyimide (PI), Mo 2 CT x /PI nanocomposite materials are prepared by using 2D Mo 2 CT x MXene as reinforcement. Compared with the properties of pure PI, Mo 2 CT x /PI nanocomposites exhibit significant improvement on thermal stability, hardness, and tribological performance. Especially, the addition of Mo 2 CT x can reduce friction coefficient and wear rate of PI significantly at different temperatures ranging from room temperature (RT) to 200 °C. The hardness and the thermo‐degradation temperature of composites increase due to the formation of an organic inorganic structure. In addition, this structure helps to form a protective film containing Mo 2 CT x nanoflakes, iron oxide, molybdenum oxide, and organic compounds during friction, and improve the tribological properties of PI composite.