Novel polyimide nanocomposites enhanced by covalent modified graphene nanosheets based on Friedel–Crafts reaction
- 89 Downloads
We report a new approach to fabricate novel polyimide (PI) nanocomposites using amine-functionalized graphene nanosheets (AGNS). AGNS was successfully prepared by Friedel–Crafts (F–C) reaction and nitroreduction. The PI nanocomposites with outstanding strength and high tribological performance were obtained though in situ polymerization in the presence of different contents of AGNS. The thermal stability, mechanical performance, and the tribological properties of PI/AGNS nanocomposites were significantly enhanced compared with that of pristine PI and PI/graphene nanosheets (GNS) blends, resulting from the strong covalent bonds between AGNS with PI matrix. Particularly, given that the friction coefficient and wear rate were reduced separately by 20.5% and 90.5% under dry sliding condition, the PI/AGNS nanocomposite with 0.5 wt% AGNS manifested the optative friction performance. The combined exclusive friction resistance and mechanical performance were the paramount factors which illustrate the applications of the resultant PI/AGNS nanocomposites in the wear-resistant field or another high-performance material.
This work was financially supported by the National Natural Science Foundation of China (51603093, 51875330, 51103065), the Science and Technology Agency of Jiangsu Province (BK 20160515), the China Postdoctoral Science Foundation (2018T110451) and Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18_2233). The work was also supported by the Tribology Science Fund of State Key Laboratory of Tribology (SKLTKF17B08) and the Project National United Engineering Laboratory for Advanced Bearing Tribology (201806). Dr. C. Min wants to express the gratitude to Jiangsu Province for supporting this project under the innovation program (Surencaiban26).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 22.Wang XL, Huang WJ (2013) Fabrication and characterization of graphene/polyimide nanocomposites. J Eukaryot Microbiol 785–786:138–144Google Scholar