Kim, SH Min, BG Lee, SC Park, SB Lee, TD Park, M Kumar, S 2024-01-21T06:34:28Z 2024-01-21T06:34:28Z 2021-09-04 2004-09 1229-9197 https://pubs.kist.re.kr/handle/201004/137292 Composite films were prepared by casting the solution of polyacrylonitrile (PAN) and single wall nanotube (SWNT) in DMF subsequent to sonication. The SWNTs in the films are well dispersed as ropes with 20-30 nm thickness. Moreover, AFM surface image of the composite film displays an interwoven fibrous structure of nanotubes which may give rise to conductive passways and lead to high conductivity. The polarized Raman spectroscopy is an ideal characterization technique for identification and the orientation study of SWNT. The well-defined G-peak intensity at 1580 cm(-1) shows a dependency on the draw ratio under cross-Nicol. The degree of nanotube orientation in the drawn film was measurable from the sine curve obtained by rotating the drawn film on the plane of cross-Nicol of polarized Raman microscope. The threshold loading of SWNT for electrical conductivity in PAN is found to be lower than 1 wt% in the composite film. The electrical conductivity of the SWNT/PAN composite film decreased with increasing of draw ratio due to the collapse of the interwoven fibrous network of the nanotubes with uniaxial orientation. English KOREAN FIBER SOC ORIENTATION CRYSTALLIZATION SPECTROSCOPY PURIFICATION NANOFIBRE BEHAVIOR GROWTH Morphology and properties of polyacrylonitrile/single wall carbon nanotube composite films Article 10.1007/BF02902999 1 FIBERS AND POLYMERS, v.5, no.3, pp.198 - 203 FIBERS AND POLYMERS 5 3 198 203 scie scopus kci other 000224848700005 2-s2.0-15744391657 Materials Science, Textiles Polymer Science Materials Science Polymer Science Article ORIENTATION CRYSTALLIZATION SPECTROSCOPY PURIFICATION NANOFIBRE BEHAVIOR GROWTH SWNT polyacrylonitrile nanocomposite AFM Raman spectroscopy