Abstract
Electrospun carbon nanofibrous mat (CNFM) is prepared by the carbonization of stabilized PAN nanofibers under temperatures between 900 °C and 1300 °C. The effects of carbonization temperatures on the structure and mechanical strength of the CNFMs are investigated via Scanning-electron-microscopy, X-ray-diffraction, Raman spectroscopy, and mechanical strength characterizations. Results show that the majority of non-carbon elements are removed from the fibers and that the graphite microstructures are mostly formed below 1100 °C, which led to quickly enhanced conductivity and mechanical strength of CNFMs. When the carbonization temperature further increase to 1300 °C, the graphite crystallite continues to grow and the mechanical strength continues to increase, but at a slower rate. The highest tensile strength of 130.2 ± 16.7 MPa and modulus of 17.53 ± 1.53 GPa were achieved at a carbonization temperature of 1300 °C.
Published Version
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