热处理温度对PAN基碳纤维微观结构的影响  

Effect of heat treatment temperature on microstructure of PAN-based carbon fiber

作　　者：刘钟铃[1] 靳玉伟[1] 徐樑华[1] 童元建[1] 

机构地区：[1]北京化工大学国家碳纤维工程技术研究中心,北京100029

出　　处：《合成纤维工业》2010年第3期1-4,共4页China Synthetic Fiber Industry

基　　金：国家重点基础研究发展计划(2006CB605302)

摘　　要：利用X射线衍射、元素分析、拉曼光谱研究了不同热处理条件下聚丙烯腈基碳纤维(PAN-CFs)微观结构和元素含量的变化,定义了PAN-CFs石墨微晶长度和石墨微晶体积。结果表明:随着热处理温度升高,纤维中氮元素含量不断减小;石墨微晶长度、微晶宽度、微晶堆叠厚度以及微晶体积均不断增大;纤维的空隙率不断增加,空隙率增加的原因为氮元素的脱出和微晶体积的增大;纤维的石墨化程度不断增加。The change of the microstructure and element content of polyacrylonitrile-based carbon fiber （PAN-CFs） was studied under different heat treatment conditions by X-ray diffraction, elemental analysis and Raman spectroscopy. The length and volume of graphite microlite were defined for PAN-CFs. The results showed that the nitrogen element content of the fiber was continuously decreased, the length, width, piled thickness and volume of graphite microlite were all increased and the interstice ratio and the graphitization degree of the fiber were also raised while elevating the heat treatment temperature. The increase of the interstic ratio was attributed to the ejectment of nitrogen element and the volume growth of microlite.

关 键 词：聚丙烯腈基碳纤 维微观结构 热处理温度 X射线衍射 拉曼光谱 

分 类 号：TQ342.742[化学工程—化纤工业]