Stretching-induced orientation to improve mechanical properties of electrospun pan nanocomposites
Hou, X. X. , Yang, X. P. , Zhang, F. , Wu, S. Z. , & Waclawik, E. (2008) Stretching-induced orientation to improve mechanical properties of electrospun pan nanocomposites. International Journal of Modern Physics B, 22(31 & 32), pp. 5913-5918.
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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 square under a stretched stress, and carbonized at 1000 square in N-2 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.
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|Item Type:||Journal Article|
|Keywords:||nanofiber, electrospinning, polyacrylonitrile, orientation|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)|
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > MACROMOLECULAR AND MATERIALS CHEMISTRY (030300)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
Past > Institutes > Institute for Sustainable Resources
Past > Schools > School of Physical & Chemical Sciences
|Copyright Owner:||Copyright 2008 World Scientific Publishing Company|
|Deposited On:||23 Jun 2009 10:40|
|Last Modified:||01 Mar 2012 00:31|
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