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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >Structure and gas permeability of multi-wall carbon nanotube buckypapers
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Structure and gas permeability of multi-wall carbon nanotube buckypapers

机译：多壁碳纳米管巴克纸的结构和透气性

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We report on the filtration behavior, scanning electron microscopy (SEM) and gas permeability of multi-wall carbon mats (buckypapers). The SEM-apparent macropore diameter, image fractal dimension and lacunarity (a measure of translational invariance) of the samples averaged at 38 nm, 1.82 and 0.55, respectively. Their N_2 adsorption analysis revealed an average BET specific surface area of 197 m~2/g, BJH pore diameter of 2.67 nm and FHH fractal dimension of 2.492. These parameters were rather insensitive to the preparation conditions. The effective diffusivity of six common laboratory gases (O_2, N_2, H_2, He, CO_2, CH_4) through buckypapers of different thicknesses was also measured. Results fell into the 3-12 x 10~(-9) m~2 s~(-1) range and correlated with the kinetic diameter of the gases.
机译：我们报告了多壁碳垫（buckypapers）的过滤行为，扫描电子显微镜（SEM）和透气性。样品的SEM表观大孔直径，图像分形维数和空隙度（平移不变性的量度）分别平均为38 nm，1.82和0.55。他们的N_2吸附分析表明，平均BET比表面积为197 m〜2 / g，BJH孔径为2.67 nm，FHH分形维数为2.492。这些参数对制备条件不敏感。还测量了六种常见实验室气体（O_2，N_2，H_2，He，CO_2，CH_4）通过不同厚度的巴克纸的有效扩散率。结果落在3-12 x 10〜（-9）m〜2 s〜（-1）范围内，并与气体的动力学直径相关。

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