热处理对PAN基碳纤维结构与性能的影响  

Effect of heat treatment on structure and properties of PAN-based carbon fiber

作　　者：靳玉伟[1] 刘钟铃[1] 高爱君[1] 徐翊桄[1] 徐樑华[1] 

机构地区：[1]北京化工大学材料科学与工程学院碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《合成纤维工业》2010年第5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：以日本进口碳纤维(T300)和国产聚丙烯腈基碳纤维(GCF)为原材料,采用自制石墨化炉,在一定拉伸条件下,对T300及GCF进行1500～2100℃热处理,制备了不同性能的高模量聚丙烯腈基碳纤维(PAN-CFs)。采用广角X射线衍射、拉曼散射光谱、万能材料测试机等探讨了在热处理过程中PAN-CFs性能的演变规律,研究了PAN-CFs的力学性能与微观结构。结果表明:随着热处理温度升高,PAN-CFs的拉伸强度逐渐下降,拉伸模量逐渐上升,纤维的微晶尺寸和微晶取向度逐渐增大,石墨化程度越来越高,PAN-CFs的微观结构从二维乱层石墨结构向有序的三维层状结构发展。High-modulus polyacrylonitrile-based carbon fibers （PAN-CFs） with different mechanical properties were prepared from carbon fiber imported from Japan （T 300） and domestic polyacrylonitrile-based carbon fiber （GCF） subjected to heat treatment at 1 500 -2 100℃ under specified drawing conditions on a self-made graphitizing furnace. The change regularity of the PAN-CFs properties was studied during the heat treatment by wide-angle X-ray diffraction analysis, Raman scattering spectrometry and universal material test, as were the mechanical properties and microstrncture of carbon fibers. The results showed that the tensile strength gradually dropped, the tensile modulus gradually rose, the crystallite size and orientation grew, the graphitization degree increased, and the microstructure of PAN-CFs transformed from two-dimensional disordered graphite structure to three-dimensional laminar structure as the heat treatment temperature was elevated.

关 键 词：聚丙烯腈 碳纤维 微观结构 力学性能 热处理 石墨化 

分 类 号：TQ342.742[化学工程—化纤工业]