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改性煤沥青中间相的微观结构研究
引用本文:宋士华,魏健宁,马明亮,李铁虎,林起浪.改性煤沥青中间相的微观结构研究[J].化学工程,2008,36(12).
作者姓名:宋士华  魏健宁  马明亮  李铁虎  林起浪
作者单位:1. 九江学院机械工程学院,江西,九江,332005
2. 西北工业大学材料科学与工程学院,陕西,西安,710072
3. 福州大学材料科学与工程学院,福建,福州,350002
基金项目:国家自然科学基金 , 江西省自然科学基金  
摘    要:以对甲基苯甲醛(4-MB)为改性剂,在对甲苯磺酸(PTS)的催化作用下对煤沥青(CTP)进行改性制取沥青中间相。采用偏光显微镜研究改性煤沥青的光学组织结构;采用扫描电镜(SEM)观察改性煤沥青的形貌。结果表明:随对甲基苯甲醛的用量、温度及热处理时间的不同,改性煤沥青可得到超镶嵌(SM)、小域(SD)和广域(D)3种光学组织结构;在一定的工艺条件下,改性煤沥青的光学组织结构显著改善,出现了大量的中间相小球体;改性后煤沥青出现较好的纤维状结构。因此,改性后的煤沥青有望成为优质的沥青中间相。

关 键 词:对甲基苯甲醛  煤沥青  改性  中间相  微观结构

Mesophase microstructure of modified coal tar pitch
SONG Shi-hua,WEI Jian-ning,MA Ming-liang,LI Tie-hu,LIN Qi-lang.Mesophase microstructure of modified coal tar pitch[J].Chemical Engineering,2008,36(12).
Authors:SONG Shi-hua  WEI Jian-ning  MA Ming-liang  LI Tie-hu  LIN Qi-lang
Abstract:The coal tar pitch(CTP) was modified to synthesize the pitch mesophase by using 4-methyl benzaldehyde(4-MB) as modifier and p-toluene sulfonic acid(PTS) as catalyst.The polarized microscope was employed to study the optical structure of pyrolyzed substances of the modified CTP and its shapes were observed through SEM.The results show that with different doses of 4-MB,temperature and heating time,the optical texture of pyrolyzed substances varies from coarseflow anisotropy elongated to domains and in certain conditions,the modification contributes to an improvement in the optical texture which appears many mesocarbon microbeads and the shapes of the modified CTP appear good fibrous structure. Therefore,the modified CTP with 4-MB is promising to become a kind of fine pitch mesophase.
Keywords:4-methyl benzaldehyde  coal tar pitch  modification  mesophase  microstructure
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