Structural Characteristics of Mesophase Spheres Prepared from Coal Tar Pitch Modified by Phenolic Resin  

作　　者：李同起 刘秀军 王成扬 王慧 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University [2]School of Material Science and Chemical Engineering, Tianjin Polytechnic University

出　　处：《Chinese Journal of Chemical Engineering》2006年第5期660-664,共5页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.50172034).

摘　　要：Mesocarbon microbeads （MCMB） were prepared from coal tar pitch modified by phenolic resin and from the same pitch modified by phenolic resin and hexamethylenetetramine at 440℃ for lh. By investigating the morphology of mesophase spheres and the structure of the MCMB carbonized at 1000℃ for lh using scanning electron microscope （SEM） and XRD, it was found that phenolic resin accelerated the formation and coalescence of mesophase spheres. Some of the obtained MCMB were hi- or tri-spheres with the distorted microtextural carbon layers. Hexamethylenetetramine in the pitch modified by phenolic resin accelerated the condensation of phenolic resin and consequently expedited the combination of mesophase spheres, which was proved by the formation of some tetra-spheres. Owing to the cross-linkage of the additives, MCMB with complex structure were obtained.Mesocarbon microbeads (MCMB) were prepared from coal tar pitch modified by phenolic resin and from the same pitch modified by phenolic resin and hexamethylenetetramine at 440℃ for 1h. By investigating the morphology of mesophase spheres and the structure of the MCMB carbonized at 1000℃ for 1h using scanning electron microscope (SEM) and XRD, it was found that phenolic resin accelerated the formation and coalescence of mesophase spheres. Some of the obtained MCMB were bi- or tri-spheres with the distorted microtextural carbon layers. Hexamethylenetetramine in the pitch modified by phenolic resin accelerated the condensation of phenolic resin and consequently expedited the combination of mesophase spheres, which was proved by the formation of some tetra-spheres. Owing to the cross-linkage of the additives, MCMB with complex structure were obtained.

关 键 词：mesocarbon microbeads MESOPHASE phenolic resin scanning electron microscopy 

分 类 号：TQ522.6[化学工程—煤化学工程]