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6FDA‐containing polyimide‐ionene + ionic liquid gas separation membranes
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-08-23 , DOI: 10.1002/pol.20200325 Grayson P. Dennis 1 , Kathryn E. O'Harra 1 , Irshad Kammakakam 1 , Tristin A. Jones 1 , Max S. Mittenthal 1 , Brian S. Flowers 1 , Yi Tuan 2 , Enrique M. Jackson 2 , Jason E. Bara 1
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-08-23 , DOI: 10.1002/pol.20200325 Grayson P. Dennis 1 , Kathryn E. O'Harra 1 , Irshad Kammakakam 1 , Tristin A. Jones 1 , Max S. Mittenthal 1 , Brian S. Flowers 1 , Yi Tuan 2 , Enrique M. Jackson 2 , Jason E. Bara 1
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Polyimides (PI) synthesized from 4,4′‐(hexafluoroisopropylidene)diphthalic anhydride (6FDA) with various diamines have been frequently studied as gas separation membranes. The use of 6FDA in polyimides creates a bent structure than can increase fractional free volume (FFV) and gas permeability. Here, we demonstrate that 6FDA is also a useful building block for PI‐ionene materials, which contain cations directly within the polymer backbone. These new 6FDA‐containing PI‐ionenes were combined with several different imidazolium ionic liquids (ILs) to form thin membranes. The thermal properties of all the derivatives were investigated to determine the relationship between regiochemistry and degradation as well as the intermolecular forces that are present within these structures. The gas separation properties of these 6FDA‐containing PI‐ionene + IL materials were investigated, showing modest CO2 permeabilities similar to other polyimide‐ionenes and CO2/CH4 and CO2/N2 permselectivities that were relatively higher than other polyimide‐ionenes.
中文翻译：
6 FDA含聚酰亚胺-紫罗兰+离子液体气体分离膜
由4,4'-（六氟异亚丙基）二邻苯二甲酸酐（6FDA）与各种二胺合成的聚酰亚胺（PI）经常被用作气体分离膜。在聚酰亚胺中使用6FDA会产生弯曲结构，这会增加自由体积分数（FFV）和气体渗透率。在这里，我们证明6FDA还是PI-紫罗烯材料的有用构建基，PI-紫罗烯材料直接在聚合物主链中包含阳离子。这些新的含有6FDA的PI-紫罗兰与几种不同的咪唑鎓离子液体（IL）结合形成薄膜。研究了所有衍生物的热性质，以确定区域化学与降解之间的关系以及这些结构内存在的分子间力。2个渗透率类似于其他聚酰亚胺-紫罗烯和CO 2 / CH 4和CO 2 / N 2 permselectivities该相对高于其他聚酰亚胺-紫罗烯。
更新日期：2020-09-16
中文翻译：
6 FDA含聚酰亚胺-紫罗兰+离子液体气体分离膜
由4,4'-（六氟异亚丙基）二邻苯二甲酸酐（6FDA）与各种二胺合成的聚酰亚胺（PI）经常被用作气体分离膜。在聚酰亚胺中使用6FDA会产生弯曲结构，这会增加自由体积分数（FFV）和气体渗透率。在这里，我们证明6FDA还是PI-紫罗烯材料的有用构建基，PI-紫罗烯材料直接在聚合物主链中包含阳离子。这些新的含有6FDA的PI-紫罗兰与几种不同的咪唑鎓离子液体（IL）结合形成薄膜。研究了所有衍生物的热性质，以确定区域化学与降解之间的关系以及这些结构内存在的分子间力。2个渗透率类似于其他聚酰亚胺-紫罗烯和CO 2 / CH 4和CO 2 / N 2 permselectivities该相对高于其他聚酰亚胺-紫罗烯。
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