新型炭材料2023，Vol.38Issue(2)：369-377,9.DOI:10.1016/S1872-5805(23)60709-7
萘系中间相沥青分子结构对其炭纤维性能的影响
The effect of the molecular structure of naphthalene-based mesophase pitch on the properties of carbon fibers derived from it
摘要
Abstract
Mesophase pitch-based carbon fibers (MPCFs) have a high modulus of elasticity, low electrical resistivity and high thermal conductivity, so can be used in many fields. Carbon fibers were prepared from two naphthalene-based mesophase pitches, one synthesized by a HF/BF3 catalytic one-step method (AR-MP) and the other by an AlCl3 catalytic two-step method (N-MP). The mesophase pitches, spun pitch fibers, pre-oxidized fibers, carbonized fibers and graphitized fibers produced from them were charac-terized by TG-MS, FT-IR, 13C-NMR, MALDI-TOF-MS, XRD, SEM and elemental analysis. The molecular structures and properties of mesophase pitches were compared, and the effects of molecular structures on the structures and properties of the carbon fibers pro-duced from them were measured. In comparison to N-MP, AR-MP has a rod-like semi-rigid molecular configuration containing more naphthenic structures and methyl side chains. The pre-oxidized fibers derived from AR-MP have a better carbon layer orientation, so that their graphitized fibers have a higher thermal conductivity of 716 W/(m·K). N-MP has a higher aromaticity with a disc-like rigid molecular configuration, so that the graphitized fibers prepared from it have a higher tensile strength of 3.47 GPa due to fewer de-fects being formed during preparation. The molecular structures of AR-MP and N-MP have an obvious influence on the structures and properties of their graphitized fibers.关键词
萘沥青/中间相沥青/催化聚合法/分子结构/微晶尺寸Key words
Naphthalene-based pitch/Mesophase pitch/Catalytic polycondensation/Molecular structure/Crystalline size分类
化学化工引用本文复制引用
徐辉涛,郭建光,李文龙,李轩科..萘系中间相沥青分子结构对其炭纤维性能的影响[J].新型炭材料,2023,38(2):369-377,9.基金项目
National Natural Science Foundation of China(U1864207).基金项目:国家自然科学基金(U1864207). （U1864207）
