Synthesis and Performance of Aromatic Polyamide Ionenes as Gas Separation Membranes
Synthesis and Performance of Aromatic Polyamide Ionenes as Gas Separation Membranes
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DOI：
10.3390/membranes10030051
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发表时间：
2020-03-01
期刊：
影响因子：
4.2
通讯作者：
Bara, Jason E.
中科院分区：
文献类型：
--
作者：
O'Harra, Kathryn E.;Kammakakam, Irshad;Bara, Jason E.
在这里，我们报道了七个主要的芳香族咪唑基聚酰胺离子烯的合成和热物理性质。分析了不同的对位、间位和邻位连接性以及离子和酰胺官能团的间距对结构和热物理性质的影响。合适的、坚固的衍生物被浇铸成薄膜、整齐的或具有化学计量比的离子液体(IL)1-苯并-3-甲基咪唑双氢呋喃([Bnmim][Tf2N])的薄膜，并测量了这些膜的气体传输性能。报道了纯气体对N-2、CH4和CO2的渗透率和渗透率。主干中一致的准连通性被证明产生了最高的二氧化碳渗透性和适合作为非常薄的、柔性的薄膜来浇注。含对苯二甲酰胺链段的衍生物表现出最高的CO2/CH4和CO2/N-2选择性，但CO2渗透性降低，进一步偏离了一致的对位键。
Here, we report the synthesis and thermophysical properties of seven primarily aromatic, imidazolium-based polyamide ionenes. The effects of varied para-, meta-, and ortho-connectivity, and spacing of ionic and amide functional groups, on structural and thermophysical properties were analyzed. Suitable, robust derivatives were cast into thin films, neat, or with stoichiometric equivalents of the ionic liquid (IL) 1-benzy-3-methylimidazolium bistriflimide ([Bnmim][Tf2N]), and the gas transport properties of these membranes were measured. Pure gas permeabilities and permselectivities for N-2, CH4, and CO2 are reported. Consistent para-connectivity in the backbone was shown to yield the highest CO2 permeability and suitability for casting as a very thin, flexible film. Derivatives containing terephthalamide segments exhibited the highest CO2/CH4 and CO2/N-2 selectivities, yet CO2 permeability decreased with further deviation from consistent para-linkages.