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以溶剂萃取获得的富含原生喹啉不溶物(PQI)的重质煤沥青为原料,通过热聚法制备中间相炭微球(MCMB)。研究了聚合条件对MCMB的微观形态、收率及β树脂含量的影响规律。结果表明,包裹在MCMB表面的PQI微粒抑制了其长大,在420℃反应4~6 h制备出的MCMB球形度好、粒度小且均匀;MCMB收率随反应时间的延长、聚合温度的升高而增大,最高能达45%以上;其β树脂含量随反应时间的增加而显著减小,炭化后的MCMB表面由许多1μm左右的片状颗粒堆砌而成,仅含C、O两种元素。
The mesoporous carbon microspheres (MCMB) were prepared by thermal polymerization from heavy coal tar pitch, which is rich in primary quinoline insoluble matter (PQI) obtained by solvent extraction. The effects of polymerization conditions on the morphology, yield and β resin content of MCMB were studied. The results showed that PQI particles wrapped on the surface of MCMB inhibited their growth, and the MCMB prepared at 420 ℃ for 4 ~ 6 h had good sphericity and small particle size. The yield of MCMB increased with the increase of reaction time and the increase of polymerization temperature High and increased up to 45% or more; the content of β resin significantly decreased with the increase of reaction time, carbonized MCMB surface by a number of 1μm sheet-like particles piled up, containing only C, O two element.