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化工学报  2014 

电场辅助制备多壁碳纳米管/聚苯乙烯复合膜的气体分离性能

DOI: 10.3969/j.issn.0438-1157.2014.01.044, PP. 337-345

Keywords: 碳纳米管,复合膜,电场,定向,分离,二氧化碳,甲烷

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Abstract:

采用溶液浇铸法制备了不同含量多壁碳纳米管(MWCNTs)和聚苯乙烯(PS)掺杂的气体分离复合膜,成膜过程中在垂直于铸膜液平面的方向上施加场强为2000V·cm-1,频率为1Hz的交变电场,直至溶剂挥发完全。采用荧光分光光度计、体式显微镜和数字万用表考察了膜的荧光特性,铸膜液中MWCNTs对水平电场的响应,MWCNTs在膜中的分散情况以及膜的垂直向电阻率,测定了复合膜对CO2、CH4的渗透系数。结果表明电场作用不仅可以实现MWCNTs在膜中的定向排布,还能够使MWCNTs在膜中分散得更均匀,定向复合膜CO2和CH4的透过性和选择性都优于非定向复合膜。

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