Catalytic graphitization of polyacrylonitrile-based carbon fibers coated with Prussian blue  

作　　者：彭奇龄 周海晖 黄振华 陈金华 旷亚非 

机构地区：[1]College of Chemistry and Chemical Engineering,Hunan University [2]State Key Laboratory of Chemo/Biosensing and Chem ometrics,Hunan University

出　　处：《Journal of Central South University》2010年第4期683-687,共5页中南大学学报（英文版）

基　　金：Project(2006CB600903) supported by the National Basic Research Program of China

摘　　要：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 ℃,interlayer spacing(d002) and crystallite size(Lc) reach 0.336 8 and 21.2 nm respectively.Contrarily,the values of d002 and Lc are 0.341 4 and 7.4 nm respectively when the bare carbon fibers were heat-treated at 2 800 ℃.Compared with the bare carbon fibers,PB can make the heat treatment temperature(HTT) drop more than 500 ℃ 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.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 ℃, interlayer spacing （d002） and crystallite size （Lc） reach 0.336 8 and 21.2 nm respectively. Contrarily, the values of d002 and Lc are 0.341 4 and 7.4 nm respectively when the bare carbon fibers were heat-treated at 2 800 ℃. Compared with the bare carbon fibers, PB can make the heat treatment temperature （HTT） drop more than 500℃ 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.

关 键 词：carbon fibers Prussian blue extent of graphitization CATALYST heat treatment COATING 

分 类 号：TQ342.742[化学工程—化纤工业] TQ127.11