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Gas separation properties of functionalized carbon nanotubes mixed matrix membranes

机译：功能化碳纳米管混合基质膜的气体分离特性

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摘要

The synergistic combinations of organic polymers for separation applications with inorganic substances such as multi-walled carbon nanotubes (MWNTs), have resulted in a new class of membrane material called mixed matrix membrane (MMM) for the separation of CO2/CH4 gases. Mixed matrix membrane incorporated functionalized MWNTs (f-MWNTs) were fabricated by the solution casting method, in which the f-MWNTs were embedded into the polyimide membrane and the resulting membranes were characterized. The effect of nominal MWNTs content between 0.5 and 1.0 wt% on the gas separation properties was investigated. The mixed matrix membranes showed 100% enhancement for the selectivity of CO2/CH4 compared to the corresponding neat polymer membrane. This new class of mixed matrix membrane has the ability to separate gases at the molecular level and has the potential to ultimately reduce the energy consumed in present-day separation operations. This study has shown that addition of CNTs to polymeric membranes has improved separation properties of the membranes to a certain extent.
机译：用于分离应用的有机聚合物与无机物质（如多壁碳纳米管（MWNTs））的协同结合，产生了一种新型膜材料，称为混合基质膜（MMM），用于分离CO2 / CH4气体。通过溶液流延法制备掺入功能化MWNT的混合基质膜（f-MWNT），其中将f-MWNT包埋在聚酰亚胺膜中并表征所得膜。研究了名义上的MWNTs含量在0.5至1.0 wt％之间对气体分离性能的影响。与相应的纯净聚合物膜相比，混合基质膜对CO2 / CH4的选择性表现出100％的提高。这种新型的混合基质膜具有在分子水平上分离气体的能力，并有可能最终减少当今分离操作中消耗的能量。这项研究表明，向聚合物膜中添加CNT可以在一定程度上改善膜的分离性能。

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