摘要
提出了利用电子束(electron beam,EB)预辐照聚丙烯腈基纤维(polyacrylonitrile-based fiber,PANF)后再进行炭化活化制备聚丙烯腈基活性炭纤维(polyacrylonitrile-based activated carbon fiber,PANACF)的方法。吸收剂量为160kGy并用w=10%KOH溶液浸渍30min的PANF在450℃下模拟炭化活化30 min后,SEM分析显示其表面出现了与未辐照PANF不同的密集的蜂巢状结构,其BET法比表面积(specific surface area,SSA)约为未辐照样品的9倍,BJH法计算结果显示其为孔径分布集中在2~10nm的介孔材料。该结果表明,EB预辐照对制备PANACF的表面形貌具有调控作用。
A new method was used to fabricate the polyacrylonitrile-based activated carbon fiber(PANACF)by the electron beam(EB)pre-irradiation in this paper.The polyacrylonitrile-based fiber(PANF)was irradiated by EB and its accumulated absorbed dose was160 kGy,and then it was dipped in the 10% KOH solution for 30 min,after that,it was placed into the furnace under nitrogen protection for carbonization at 450℃for 30 min.The analysis result of scanning electron microscope(SEM)shows that the surface of preirradiated PANACF appears dense honeycomb structure,which is very different with the unirradiated PANACF.Moreover,the specific surface area(SSA)of pre-irradiated PANACF is about 9times larger than the un-irradiated sample's(SSA was calculated by the BET method).The BJH results reveal that the PANACF prepared by EB pre-irradiation is a novel mesoporous structure,and its pore size distribution is focused on the range from 2nm to10 nm.The preliminary research results indicate that the surface morphology of PANACF can be controlling by EB pre-irradiation.
引文
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