Structure and gas permeability of multi-wall carbon nanotube buckypapers
Structure and gas permeability of multi-wall carbon nanotube buckypapers
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DOI：
10.1016/j.carbon.2007.02.022
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发表时间：
2007-05-01
期刊：
影响因子：
10.9
通讯作者：
Kiricsi, Imre
中科院分区：
文献类型：
--
作者：
Smajda, Rita;Kukovecz, Akos;Kiricsi, Imre
我们报道了多壁碳垫的过滤行为、扫描电子显微镜(SEM)和气体渗透性。扫描电子显微镜下样品的表观大孔直径、图像分维和空隙(衡量平移不变性的指标)的平均值分别为38 nm、1.82和0.55。N-2吸附分析表明，它们的平均比表面积为197m(2)/g，BJH孔径为2.67 nm，FHH分维为2.492。这些参数对制备条件不敏感。测量了6种常见实验室气体(O-2、N-2、H-2、He、CO_2、CH_4)在不同厚度的蜡纸中的有效扩散系数。结果落在3-12×10(-9)m(2)S(-1)范围内，并与气体的运动直径相关。(C)2007爱思唯尔有限公司。保留所有权利。
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, CO2, CH4) 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. (C) 2007 Elsevier Ltd. All rights reserved.