【摘要】 为了定量地描述和分析石墨纤维的比表面积和孔隙结构,采用低温氮吸附法测定石墨纤维在液氮温度和不同压力条件下的氮气吸附-脱附等温曲线。研究表明石墨纤维属于微孔材料,含有大量的微孔和极少量的介孔;石墨纤维的BET比表面积、总孔体积和平均孔径分别为541.00m2/g、0.2436cm3/g、1.8010nm,其微孔的比表面积、孔体积和孔径分别为535.53m2/g、0.2331cm3/g、0.9896nm;石墨纤维的孔径分布较窄,主要是大量1.4nm左右的微孔和极少量2.0～7.7nm范围的介孔,微孔对比表面积和孔体积的贡献最大。更多还原

【Abstract】 To quantitatively describe and analyze specific surface area and pore structure of graphite fibers,in this paper,nitrogen adsorption-desorption isotherms of graphite fibers were measured by low temperature nitrogen adsorption method at liquid nitrogen temperature and different pressures.It showed that graphite fibers are microporous material which contains a large number of microporous and a few of mesoporous;the BET specific surface area,total pore volume and average pore size of graphite fibers were 541.00m2/g,0.2436cm3/g and 1.8010nm,respectively,and the specific surface area,pore volume and pore diameter of its microporous were 535.53m2 / g,0.2331cm3/g and 0.9896nm,respectively;there is a narrow pore size distribution of graphite fibers,which are a large number of microporous about 1.4nm and a few of mesoporous about 2.0-7.7nm,and the microporous is the greatest contribution to the specific surface area and the pore volume.更多还原