Journal
TRIBOLOGY INTERNATIONAL
Volume 117, Issue -, Pages 217-224Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2017.09.006
Keywords
Graphene oxide/carbon nanotubes hybrids; Polyimide; Synergistic effects; Tribological properties
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Funding
- National Natural Science Foundation of China [51603093, 21403091, 51402128, 51372103, 51103065]
- Science and Technology Agency of Jiangsu Province [BK 20160515, BK20140561]
- Key Laboratory of Superlight Materials & Surface Technology (Harbin Engineering University), Ministry of Education
- Jiangsu Province [Surencaiban[2015]26]
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The graphene oxide (GO) nanosheets/carboxyl-functionalized multi-walled carbon nanotubes (CNTs) hybrids (GO/CNTs) were synthesized via vacuum filtration solution hybrid dispersion and the corresponding GO/CNTs/polyimide (GO/CNTs/PI) nanocomposite films were facilely prepared by in situ polymerization. Both the thermal stability, mechanical and tribological properties of GO/CNTs/PI nanocomposites were greatly improved compared with those of pure PI due to the homogeneous dispersion of GO/CNTs and the strong interfacial covalent bonds between GO/CNTs and the PI matrix. Furthermore, GO/CNTs/PI nanocomposites exhibited the much lower friction coefficient compared to that of PI composites with the same loading of GO or CNTs only, suggesting the synergistic effects of GO/CNTs hybrids on the tribological properties of polyimide nanocomposites, especially the weight ratio of GO and CNTs was 3:1.
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