Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Strength Increase of Medium Temperature-carbonized PAN Nano Fibers Made by Mechano-electrospinning

  • Kim, J.H. (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Bajaj, B. (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Yoon, S.J. (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, S.H. (Department of Fiber and Polymer Engineering, Hanyang University) ;
  • Lee, J.R. (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • Received : 2013.05.10
  • Accepted : 2013.06.13
  • Published : 2013.06.30
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Abstract

In this study, the effect of phosphoric acid (PA) as a fiber spinning aid on the strength increase of polyacrylonitrile (PAN) nano-fibers by using modified mechano-electrospinning technologies has been analyzed. The medium carbonization temperature of $800^{\circ}C$ has been selected for the future economic production of these new materials. The concentration of PAN in dimethyl sulfoxide (DMSO) was fixed as 5 wt%. The weight fraction of PA was selected as being 2%, 4%, 6%, and 8% in comparison to PAN. These solutions have been used to make the nanofibers. The mechano-electrospinning apparatus installed in KRICT was made by our own design. By using this apparatus the continous and highly aligned precursor nano-fibers have been obtained. The bundle of 50 well aligned nano diameter continuous fibers with the diametr of 10 microns with 6 wt% phosphoric acid for addition showed maximum mechanical properties of 1.6 GPa as tensile strength and 300 GPa as Young's modulus. The weight of final product can be increased 19%, which can improve the economical benefits for the application of these new materials.

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