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Prussian blue (PB) was used as catalyst to improve the extent of graphitization of polyacrylonitrile (PAN)-based carbon fibers.
PB was deposited on carbon fibers by anodic electrodeposition and the thickness of PB coating (PB content) was controlled
by adjusting the electrodeposition time. PAN-based carbon fibers with PB coating were heat-treated and the extent of graphitization
was measured by X-ray diffractometry and Raman spectroscopy. The results indicate that the extent of graphitization of PAN-based
carbon fibers is enhanced in the presence of the coating. When the PB-coated carbon fibers were heat-treated at 1 900 °C,
interlayer spacing (d
002) and crystallite size (L
c) reach 0.336 8 and 21.2 nm respectively. Contrarily, the values of d
002 and L
c are 0.341 4 and 7.4 nm respectively when the bare carbon fibers were heat-treated at 2 800 °C. Compared with the bare carbon
fibers, PB can make the heat treatment temperature (HTT) drop more than 500 °C in order to reach the same extent of graphitization.
Furthermore, the research results show that PB content also has a certain influence on the extent of graphitization at the
same HTT. 相似文献
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聚丙烯腈基炭纤维表面电沉积 Ni-Fe合金的催化石墨化性能 总被引:1,自引:0,他引:1
在聚丙烯氰基炭纤维上电沉积Ni-Fe合金催化剂,并采用x-射线衍射和拉曼光谱方法考察其对热处理炭纤维石墨化的催化性能.结果表明:Ni-Fe合金在低温条件下对炭纤维石墨化有着优异的催化性能.附有Ni-Fe合金(铁的质量分数为57.91%)的聚丙烯腈基炭纤维经过1250℃热处理后其石墨化度为69.0%,而空白样炭纤维经过2... 相似文献
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