Open AccessGraphitized Carbon Fibers Based on Lyocell Precursors
Author(s) -
Igor Makarov,
Л. К. Голова,
M. I. Vinogradov,
D. N. Chernenko,
V. G. Kulichikhin
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/316/1/012032
Subject(s) - lyocell , carbonization , transmission electron microscopy , materials science , cellulose , graphite , scanning electron microscope , ultimate tensile strength , composite material , cellulose fiber , carbon fibers , dissolution , pyrolysis , chemical engineering , fiber , nanotechnology , composite number , engineering
For the first time, graphitized fibers from Lyocell cellulose precursors spun from solutions prepared via the solid-phase dissolution method in N-methylmorpholine-N-oxide were obtained. Carbonization was performed up to processing temperature of 2400 °C. Comparative studies of cellulose precursors and carbon fibers, carried out by means of scanning and transmission electron microscopy, X-ray and thermal analysis, allowed us to establish the structural-morphological features and thermophysical properties of carbon fibers. It is shown that graphitized fibers consist of randomly arranged regular lamellae of graphite-like layers. Using transmission electron microscopy, the interplanar distance between the layers (d 002 ) was estimated to be ∼ 0.341 nm. Graphitization of the fibers leads to content of carbon ∼99.75% and oxygen ∼0.25% and to reach the tensile strength up to 1.5 GPa.