【摘要】 添加1%氯化铝的煤沥青在400℃热处理不同时间,得到一系列不溶于吡啶或丙酮的产物,利用SEM和TEM对所得产物进行表征和分析,结合现有理论,研究氯化铝作用下中间相炭微球的形成历程。结果表明,平面大分子首先在氯化铝附近区域生成并富集,面面层积形成片层单元,片层单元析出非球形颗粒,均相成核,同步生长,最终形成小球体。小球体具有接触但不融并的特性,有望高收率地制备中间相炭微球。更多还原

【Abstract】 A series of PI and acetone insoluble residues were prepared by heat-treated coal tar pitch with 1% AlCl3 at 400 ℃ for different time. SEM and TEM were employed to characterize the residues. The formation of mesocarbon microbeads was studied based on the experiment results and existing theories. It was showed that the formation of mesocarbon microbeads is as follows: firstly, high molecular weight planar molecules birthed and enriched surrounding the AlCl3, and stacking layer by layer to form lamellar units. The lamellar units which separated from parent pitch translated into irregular nucleus, which grew up and finally formed spherules. These spherules touched each other but not coalesced, which suggested that mesocarbon microbeads could be prepared with high yield by addition of AlCl3.更多还原