Structural and Morphological Changes of Electrospun Polyacrylonitrile (PAN) Nanofibers according to Heat Treatment Conditions 


Vol. 53,  No. 4, pp. 285-292, Aug.  2016
10.12772/TSE.2016.53.285


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  Abstract

In this study, the structural and morphological changes of polyacrylonitrile (PAN) nanowebs by various heat treatment conditions were investigated. Morphology and crystalline structure of the PAN nanowebs were analyzed using field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). In the case of heat treated PAN nanowebs, welding phenomenon occurred at crosslinking points of fibers comprising the webs. Due to the welding the enhanced tensile strength of the PAN nanowebs was expected. The chemical structure and thermal properties of the PAN nanowebs were investigated by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC) and thermogravimetric analyzer (TGA). The results showed that the heat-treated PAN nanowebs became thermally stable compared with as-spun. After the heat treatment, the C≡N groups on the PAN nanowebs converted to C=N and C=C groups corresponding to stabilization reaction. The tensile strength of the PAN nanowebs was higher than that of as-spun.

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pISSN : 1225 - 1089
eISSN : 2288 - 6419

한국연구재단 우수등재학술지 유지 (2022년)