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- Title
STRETCHING-INDUCED ORIENTATION TO IMPROVE MECHANICAL PROPERTIES OF ELECTROSPUN PAN NANOCOMPOSITES.
- Authors
HOU, X. X.; YANG, X. P.; ZHANG, F.; WU, S. Z.; WACLAWIK, E.
- Abstract
Partially aligned and oriented polyacrylonitrile(PAN)-based nanofibers were electrospun from PAN and SWNTs/PAN in the solution of dimethylformamide(DMF) to make the carbon nanofibers. The as-spun nanofibers were hot-stretched in an oven to enhance its orientation and crystallinity. Then it were stabilized at 250 °C under a stretched stress, and carbonized at 1000 °C in N2 atmosphere by fixing the length of the stabilized nanofiber to convert them into carbon nanofibers. With this hot-stretched process and with the introduction of SWNTs, the mechanical properties will be enhanced correspondingly. The crystallinity of the stretched fibers confirmed by X-ray diffraction has also increased. For PAN nanofibers, the improved fiber alignment and crystallinity resulted in the increased mechanical properties, such as the modulus and tensile strength of the nanofibers. It was concluded that the hot-stretched nanofiber and the SWNTs/PAN nanofibers can be used as a potential precursor to produce high-performance carbon composites.
- Subjects
DIMETHYLFORMAMIDE; NANOFIBERS; X-ray diffraction; COMPOSITE materials; OPTICAL diffraction
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2008, Vol 22, Issue 31/32, p5913
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979208051364