煤炭转化2025，Vol.48Issue(4)：59-67,9.DOI:10.19726/j.cnki.ebcc.202504006
煤沥青与石油渣油共炭化制备纺丝性能优异的可纺沥青研究
Study on spinnable pitch with high-spinnability prepared by co-carbonization of coal tar pitch and petroleum residue
摘要
Abstract
As for coal tar pitch(CTP),it was difficult to avoid the formation of quinoline insoluble induced by excessive dehydrogenation during high temperature treatment,which destroyed the spinning performance of spinnable pitch and effected the mechanical properties of isotropic pitch-based carbon fiber.Petroleum residue(PR)is abundant of alkyl and naphthenic structure,pyrolyzing and generating free radicals during carbonization.Therefore,the co-carbonization of CTP and PR were used to synthesize spinnable pitch so as to improve the spinning performance of spinnable pitch and the mechanical properties of resultant carbon fiber.The alkyl and naphthenic structure were intro-duced into the spinnable pitch through the mutual cross-linking of CTP molecule and PR molecule during co-carbonization reaction.The synergism effect prevented excessive polymerization of coal tar pitch.In this paper,three isotropic spinnable pitches were prepared by co-carbonization between CTP and PR with different mass ratios.After melt spinning,oxidative stabilization and carbonization,the isotropic pitch-based carbon fiber was obtained.The molecular structure of spinnable pitch was charac-terized by elemental analysis,Fourier infrared spectroscopy,thermogravimetric analysis,13C nuclear magnetic resonance and MALDI-TOF/TOF mass spectrometry,and the effects of the introduced alkyl and naphthenic structure on its spinning performance and the mechanical properties of resultant carbon fiber were investigated.The spinnable pitch with a co-carbonization ratio of CTP to PR of 4∶1 showed high spinning performance,because its molecular structure is more linear.The obtained pitch-based carbon fiber exhibited excellent mechanical properties with tensile strength of(935±28)MPa and Young's modulus of(51.6±2.2)GPa,which were higher than those of mechanical properties of pitch-based carbon fiber produced alone from coal tar pitch.The co-carbonization by two different substances provideds an effective method for improving the mechanical properties of isotropic pitch-based carbon fiber.关键词
煤沥青/石油渣油/共炭化/各向同性可纺沥青/力学强度Key words
coal tar pitch/petroleum residue/co-carbonization/isotropic spinnable pitch/mechanical properties分类
化学化工引用本文复制引用
牛浩,周国斌,曲世杰..煤沥青与石油渣油共炭化制备纺丝性能优异的可纺沥青研究[J].煤炭转化,2025,48(4):59-67,9.基金项目
国家自然科学基金项目(U24A20548)、山西省高等学校科技创新项目(2024L418)、中国科学院山西煤炭化学研究所自主创新项目(SCJC-XCL-2023-08)、中国辐射防护研究院科学研究平台开放式基金项目(CIRP2023OF001)和山西工程科技职业大学科研基金项目(KJ202333). （U24A20548）
