中间相沥青纤维在不同氧气浓度下氧化稳定化过程的研究  

STUDY ON OXIDATIVE STABILIZATION OF MESOPHASE PITCH FIBER UNDER DIFFERENT CONCENTRATION OF OXYGEN

作　　者：凌立成[1] 吴东[1] 陈玉琴[1] 刘朗[1] 

机构地区：[1]中国科学院山西煤炭化学研究所

出　　处：《炭素技术》1996年第2期12-16,共5页Carbon Techniques

摘　　要：研究了萘系中间相沥青在不同氧气浓度下氧化稳定化过程，以期改善炭纤维的力学性能和缩短氧化稳定化时间，与空气相比（氧含量为２１％），在较低的氧气浓度下（Ｏ２：１０％，Ｎ２：９０％，体积含量）氧化后的纤维，经过后续炭化处理，炭纤维的抗拉强度及模量有一定的提高，而最终氧化终温则一样；在较高的氧气浓度下（３０％，５０％）进行氧化稳定化，可使氧化终温比空气时降低２０℃左右，但炭纤维的抗拉强度及模量有所下降。元素分析数据及红外光谱表明在较高氧气浓度下，沥青纤维与氧气的反应速度大大加快，在不同氧气浓度下稳定化、炭化后而得的炭纤维断面结构及微晶参数没有很大差别。Abstract Oxidative Stabilization of pitch fiber derived from naphthalane mesophase pitch under various concentraticn of oxygen was studied with a view to improving the mechanical properties and shortenning the stabilization time. Lower oxygen contents(10%) in nitrogen during stabilization improved the tensile strength and Young's modulus to compare that of air, even the both final stabilization temperatures were the same. Higher oxygen contents(30% and 50%) in N2 during stabilization lowed the stabilization temperature for about 20℃ to compare that of in air, although the tensile strength and Young's modulus decreased a little. FTIR and elemental analysis revealed the reaction between the pitch fiber and oxygen was accelerated by the higher oxygen concentration during stabilization process. Larger difference were found neither in scanning electron observation nor in X─ray parameters among the resultant carbon fibers.

关 键 词：炭纤维 沥青纤维 氧化 稳定化 

分 类 号：TQ342.742[化学工程—化纤工业]