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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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纤维素醋酸丁酸酯/碳纳米管混合基质膜的气体分离性能
DOI: 10.11777/j.issn1000-3304.2015.15095, PP. 1396-1401
Keywords: 纤维素醋酸丁酸酯,多壁碳纳米管,气体分离,混合基质膜
Abstract:
通过溶液复合-溶液成膜的方法,制备了一系列纤维素醋酸丁酸酯(CAB)/多壁碳纳米管(MWCNTs)的新型混合基质膜.表征了CAB/MWCNTs膜材料的形貌、结构与力学性能.结果表明,MWCNTs与CAB界面未见明显缺陷存在,混合基质膜材料具有良好的力学性能.进一步考察了不同MWCNTs含量(2wt%~30wt%)对CAB/MWCNTs混合基质膜材料的气体分离性能的影响.发现,随着混合基质膜中MWCNTs含量的增加,其对几种测试气体(O2、N2、CH4、CO和CO2)的渗透系数均明显提高,尤其是常见气体对中的"快气"——O2和CO2的渗透系数提高显著当MWCNTs含量为30wt%时,所制备的混合基质膜对O2和CO2渗透系数分别达到40.24和180.20Barrer,比纯CAB膜分别提高了约300%和260%;同时,混合基质膜对多种气体对均表现出优异的分离效果.
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