Polysulfone and functionalized carbon nanotube mixed matrix membranes for gas separation: Theory and experiment

被引:322
|
作者
Kim, Sangil
Chen, Liang
Johnson, J. Karl
Marand, Eva [1 ]
机构
[1] Virginia Polytech Inst & State Univ, Dept Chem Engn, Blacksburg, VA 24061 USA
[2] Univ Pittsburgh, Dept Chem Engn, Pittsburgh, PA 15261 USA
[3] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA
关键词
mixed matrix membranes; carbon nanotubes; gas separation;
D O I
10.1016/j.memsci.2007.02.028
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Novel nanocomposite membranes containing single walled carbon nanotubes inside a polysulfone matrix have been prepared and characterized. The carbon nanotubes were functionalized with long chain alkyl amines to facilitate dispersion in the polymer. Both permeabilities and diffusivities of the membranes increased with increasing weight fraction of carbon nanotubes at 4 atm. Experimental sorption isotherms of H-2, O-2,O- CH4 and CO2 were consistent with isotherms predicted by atomistic simulations. Comparison of CO2 adsorption of closed and open nanotubes with simulations of closed and partially open carbon nanotube bundles suggests that HiPco nanotubes are approximately 47% open. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:147 / 158
页数:12
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