高温煤沥青中间相热转化行为  

Formation and transformation behavior of mesophase from three high softening-point pitches

作　　者：杨桃[1,2] 刘犇 宋燕[1] 马兆昆[3] 宋怀河[3] 刘占军[1] YANG Tao;LIU Ben;SONG Yan;MA Zhao-kun;SONG Huai-he;LIU Zhan-jun(CAS Key Laboratory of Carbon Materials,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国科学院山西煤炭化学研究所炭材料重点实验室,山西太原030001 [2]中国科学院大学材料与光电研究中心,北京100049 [3]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《新型炭材料》2019年第6期546-551,共6页New Carbon Materials

基　　金：NSFC-山西煤基低碳联合基金(U1610252)~~

摘　　要：沥青的组成结构直接决定其中间相形成和热转化行为。本文对3种高温煤沥青的组成和分子结构对中间相热转化的影响进行了研究。利用傅里叶红外光谱仪与X-射线衍射分析仪对煤沥青的分子结构进行分析,并采用带有热台的偏光显微镜原位观察煤沥青的中间相热转化行为。通过原位观察发现,不同高温煤沥青在相同条件下的中间相热转化行为并不完全相同,与其内部组成和结构相关。喹啉不溶物含量较高的煤沥青基炭微球成核速率显著高于生长速率,而芳香度较高的分子片层利于炭微球的生长与融并,从而形成体形中间相。The transformation behavior of mesophase derived from three coal tar pitches with different softening-points was investigated. FTIR and XRD were used to analyze the compositions and molecular structures of pitches. The transformation behavior of the pitch to mesophase was observed in situ by a polarizing light microscope equipped with a heating stage. A correlation of the composition and molecular structure of the pitches to the development of the mesophase was obtained. Results indicate that the thermal conversion behavior of the three pitches to mesophase were different, and this was closely related to their aromaticity and quinolone insoluble fraction. The nucleation rate of mesocarbon microbeads was higher than the growth rate for the coal tar pitch with a high content of quinolone insolubles. A molecular lamellar structure with a high aromaticity benefitted the growth of microspheres and the formation of mesophase.

关 键 词：高温煤沥青 中间相 热转化 分子结构 

分 类 号：TQ127.1+1[化学工程—无机化工]