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Tribological and Mechanical Properties of Carbon Nanofiber-Filled Polytetrafluoroethylene/Polyimide Composites

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The tribological and mechanical properties of carbon nanofiber filled polytetrafluoroethylene/polyimide composites were studied in this paper. The effect of filler contents (0.5, 1, 1.5, 2, 2.5, 3 and 5 wt%) on the tribological and mechanical properties was examined. Also, the influence of various loads (100 N, 150 N and 200 N) and velocities (0.69 m/s and 1.4 m/s) on the tribological performance was investigated. The results show that the best friction and wear performance would obtained under different loads and velocities, which reduced by 56.7% (150 N, 1.4 m/s) and 72.6% (200 N, 0.69 m/s), respectively. And also, optimal mechanical properties were obtained. In comparison with the mechanical properties of polytetrafluoroethylene/polyimide composites, the tensile strength, elongation-to-break and impact strength of 1 wt% carbon nanofiber filled polytetrafluoroethylene/polyimide composites increased by 5%, 50% and 75%, respectively. The transfer films, worn surfaces and impact fracture surfaces were studied by scanning electron microscopy. The micrographs show that a proper content of carbon nanofiber is helpful for forming a smooth and continuous transfer film, which is essential for achieving good anti-wear property. Meanwhile, mechanical properties have been improved due to the interfacial interaction between the matrix and carbon nanofibers.
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Document Type: Research Article

Publication date: 2009-10-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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