碳纳米管对中间相炭微球制备的影响

以中温煤沥青和碳纳米管为原料进行热缩聚反应,制备出含有碳纳米管的中间相炭微球,采用扫描电子显微镜(SEM)、激光粒度仪和X射线衍射(XRD)等分析手段对其形貌及结构进行了表征。研究了添加碳纳米管对中间相炭微球形貌、粒径、产率、微晶结构及热缩聚工艺的影响。结果表明添加碳纳米管能够促进小球成核,阻止小球的融并长大,使炭微球的粒径减小,分布均匀,但过多的碳纳米管会导致球形度变差及中间相沥青产率的降低;碳纳米管的存在使石墨片层尺寸减小,石墨化程度降低;碳纳米管经过酸煮处理后,可以获得球形度更好、含有更大比例碳纳米管的中间相炭微球。

Influence of carbon nanotubes on the preparation of mesocarbon microbeads

Mesocarbon microbeads(MCMB) were prepared from coal tar pitch and carbon nanotubes(CNTs).The morphologie and structure of the MCMB were investigated by SEM,laser particle size analyzer and XRD.The effect of CNTs addition on the morphologie,particle size,yield,crystallite structure of MCMB and technological parameter was investigated.The results show that adding CNTs enhances the nucleation and inhibits the growth and coalescence of MCMB,and the MCMB made in the presence of CNTs tend to have smaller size and...