用氮气吸附研究活性炭纤维的分维  

THE RESEARCH ON TRACTAL OF ACTIATED CARBON FIBER BY NITROGEN ADSORPTION

作　　者：黄正宏[1] 康飞宇[1] 梁开明[1] 赵红阳[2] 马兰[2] 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]防化研究院,北京100083

出　　处：《炭素技术》2000年第4期40-42,共3页Carbon Techniques

摘　　要：3种比表面积不同的粘胶基活性炭纤维（ACF）在77K下进行氮气吸附，得到了比表面积、微孔容积和孔径分布，并用等温吸附数据分析了ACF的分维。研究结果表明：氮气多层吸附早期和高度覆盖时得到的分维有所不同，但是其趋势基本一致，前者得到的结果更为合理，分维与比表面积、微孔容积没有直接的对应关系，而与H－K孔径分布以及特征吸附能较为一致，反映了小微孔含量的多少。Nitrogen adsorption(77 K) was measured on three kinds of viscose rayon based activated carbon fibers(ACFs) with different specific areas. Pore structure parameters, such as specific surface area, micropore volume and pore size distributions, were characterized. The fractal dimensions were examined by isotherm data. The results show that the fractal dimensions determined at early stage of the multilayer formation are different from those estimated at higher coverage, however, the trends are consistent and the former is more reasonable. The fractal dimensions, which reveal the content of ultramicropore, coincide with H－ K pore size distributions and characteristic adsorption energy other than specific areas and micropore volume.

关 键 词：活性炭纤维 氮气吸附 分维ACF 分形维数 

分 类 号：TQ342.86[化学工程—化纤工业] TQ340.1