硅油分散体系中间相炭微球的制备与结构研究

摘要

以煤沥青为原料,硅油为分散剂和导热介质制备出表面光滑、平均粒径小、分布均匀、收率高的中间相炭微球(MCMB).利用偏光显微镜、SEM和TEM等手段对MCMB的形貌、结构、粒径和收率进行分析.结果表明,热处理温度和保温时间对MCMB的形成有重要影响,在较低的温度350-380℃可得到MCMB,随保温时间的延长,MCMB的偏光织构差异明显、粒径增大、收率提高;较佳的工艺条件为380℃保温;MCMB的构筑单元为分子层片,其堆积形式为Brooks-Taylor型.%Mcsocarbom micrubeads (MCMB) were prepared by heat condensation in the retort with coal tar pitch and silicone oil as ahe dispersion and beat excbange medliUnm. The influence of silicone oil on the preparation of MCMB was studied hy polrized mieroscupy, SEM and FEM. The results showed the heating temperaturc and holding time had important influce, on the formation of MCMB. MCMB were obtained at 350-380E, and po Infixed microstructure changed, the diameter and yield increased with holding time prolonging. The building units of MCMB were molecular layer, and the structurc was Brooks Taylor type. Furthermore. optimuma conditions were as follow: the healing temperatue was 38O ℃, and the holding time was 2h.