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Properties of carbon nanofibers prepared from electrospun polyimide
Author(s) -
Chung G. S.,
Jo S. M.,
Kim B. C.
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21742
Subject(s) - carbonization , materials science , polyimide , nanofiber , polyacrylonitrile , scanning electron microscope , graphite , composite material , raman spectroscopy , transmission electron microscopy , chemical engineering , carbon nanofiber , polymer chemistry , polymer , nanotechnology , carbon nanotube , layer (electronics) , physics , engineering , optics
Abstract A solution of a polyimide (PI, Matrimid® 5218) in dimethylacetamide was electrospun, and carbonization of the electrospun nonwoven fabrics produced carbon nanofiber fabrics. The effects of iron(III) acetylacetonate (AAI) on carbonization and the resulting morphology were also investigated. The carbonization behavior of the nonwoven fabrics was examined by X‐ray diffraction and Raman spectroscopy. AAI promoted carbonization of the nonwoven fabrics and increased the carbon yield. Addition of 3 wt % AAI increased the crystal dimension of electrospun PI nanofibers from 1.06 to 4.18 nm and decreased the integrated intensity ratio from 3.37 to 1.83 when heat treated at 1200°C. Scanning electron microscopy images of the carbonized nonwoven fabrics showed that AAI remained as particles within the fibers after carbonization. In addition, transmission electron microscopy observations revealed that turbostratic‐oriented graphite layers were observed around the particles even at 1200°C, which have been reported only on carbonization of rigid‐chain solvent insoluble PI materials under tension. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97:165–170, 2005