新型炭材料2016，Vol.31Issue(5)：550-554,5.DOI:10.1016/S1872-5805(16)60031-8
PAN纤维炭化过程致密化机理研究
The densification mechanism of polyacrylonitrile carbon fibers during carbonization
摘要
Abstract
The densification mechanism of polyacrylonitrile carbon fibers during carbonization from 900 to 1 400℃ was investiga-ted. The density, elemental composition, microstructure and weight loss of the fibers, as well as the gases released during the process were analyzed to reveal the mechanism. Results indicated that the density of the fibers was strongly dependent on the carbon-ization temperature and reactions involved indifferent temperature regimes. Condensation, pyrolysis and graphitization reactions were dominant at low (<1 050 ℃), medium (1 050-1 250 ℃) and high (>1 250 ℃) temperatures, respectively. The amount of small molecule gas released and the fiber density both increased rapidly with temperature when condensation reactions dominated. The fi-ber density decreased as a result of nitrogen release when pyrolysis reactions dominated above 1050 ° C while the fiber density in-creased due to the growth and increase in order of the graphene layers during graphitization. The two fiber density maxima found with increasing carbonization temperature were attributed to the different reactions.关键词
炭纤维/致密化/炭化/缩聚/裂解Key words
Carbon fiber/Densification/Carbonization/Condensation/Pyrolysis分类
化学化工引用本文复制引用
马全胜,高爱君,童元建,张佐光..PAN纤维炭化过程致密化机理研究[J].新型炭材料,2016,31(5):550-554,5.基金项目
国家863计划(2015AA03A202).@@@@National High Technology Research and Development Program of China(2015AA03A202) （2015AA03A202）
