ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Partially aligned and oriented polyacrylonitrile(PAN)-based nanofibers were electrospunfrom PAN and CNTs/PAN in the solution of dimethylformamide(DMF) to manufacture the carbonnanofibers. The as-spun nanofibers were hot-stretched in a temperature controlled oven to enhanceits crystallinity and molecular orientation. Therefore it were stabilized at 250 ( under a stress, andcarbonized at 1000 ( in N2 atmosphere by fixing the length of the stabilized nanofiber to convertthem into carbon nanofibers. With the hot-stretched process and with the content of CNTs, themechanical properties will be enhanced correspondingly. The crystallinity of the stretched fibersconfirmed by X-ray diffraction has also increased. For PAN nanofibers, the improved fiberalignment and crystallinity resulted in the increased mechanical properties, such as the modulus andtensile strength of the nanofibers. It was concluded that the hot-stretched nanofiber and theCNTs/PAN nanofibers can be used as a potential precursor to produce high-performance carboncomposites
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1169.pdf
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