Improving Surface Wear Resistance of Polyimide by Inserting KH550 Grafted GO

Chen Liu; Jingfu Song; Gai Zhao; Qingjun Ding

doi:10.3390/polym15112577

Improving Surface Wear Resistance of Polyimide by Inserting KH550 Grafted GO

Polymers (Basel). 2023 Jun 4;15(11):2577. doi: 10.3390/polym15112577.

Authors

Chen Liu¹, Jingfu Song², Gai Zhao¹, Qingjun Ding¹

Affiliations

¹ State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
² School of Naval Architecture & Ocean Engineering, Jiangsu Maritime Institute, Nanjing 211170, China.

Abstract

To improve the wear resistance of polyimide (PI), surface modification was developed. In this study, the tribological properties of graphene (GN), graphene oxide (GO), and KH550-grafted graphene oxide (K5-GO) modified PI were evaluated by molecular dynamics (MD) at the atomic level. The findings indicated that the addition of nanomaterials can significantly enhance the friction performance of PI. The friction coefficient of PI composites decreased from 0.253 to 0.232, 0.136, and 0.079 after coating GN, GO and K5-GO, respectively. Among them, the K5-GO/PI exhibited the best surface wear resistance. Importantly, the mechanism behind the modification of PI was thoroughly revealed by observing the wear state, analyzing the changes of interfacial interactions, interfacial temperature, and relative concentration.

Keywords: graphene oxide; molecular dynamics simulation; polyimide; tribology.

Abstract

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