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Variations in the microstructure of carbon fibers prepared from liquefied wood during carbonization
Author(s) -
Ma Xiaojun,
Zhao Guangjie
Publication year - 2011
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.34142
Subject(s) - carbonization , crystallite , materials science , microstructure , raman spectroscopy , composite material , curing (chemistry) , fourier transform infrared spectroscopy , hexamethylenetetramine , pyrolysis , chemical engineering , scanning electron microscope , physics , optics , metallurgy , engineering
After spinning by adding hexamethylenetetramine and the curing treatment, carbon fibers from liquefied wood (LWCFs) were prepared by direct carbonization. Microstructure change of LWCFs during carbonization is studied by X‐ray, Raman spectroscopy, and FTIR. Raman spectroscopy shows both the D peak at 1360 cm −1 and the G peak at 1595 cm −1 exist after 600°C, and a significant decrease is found in I D /I G during carbonization. X‐ray diffraction shows the crystallite size ( L c (002) and L a (100) ) of LWCFs firstly decreases before 800°C and then increases with heat treatment temperature (HTT) increasing, whereas the interlayer spacing ( d 002 ) gradually decreases during carbonization. It is also found that the crystallite shape ( L a / L c ) and the degree of graphitization ( G ) all increase with increasing HTT. It is also found that structure of the precursor fibers from liquefied wood has been completely changed after carbonization. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011