Inorganic/organic double-network ion gel membrane with a high ionic liquid content for CO2 separation
Inorganic/organic double-network ion gel membrane with a high ionic liquid content for CO2 separation
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DOI：
10.1038/s41428-020-0393-y
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发表时间：
2020-08-17
期刊：
影响因子：
2.8
通讯作者：
Matsuyama, Hideto
中科院分区：
文献类型：
--
作者：
Kamio, Eiji;Minakata, Masayuki;Matsuyama, Hideto
为了考察离子凝胶作为CO2分离膜材料的潜力，制备了不同离子液体（IL）含量的无机/有机双网络离子凝胶（DN离子凝胶）膜。优化了无机和有机网络的组成以最大化DN离子凝胶的机械强度。具有0.35mol/mol的无机/有机网络组成的DN离子凝胶显示出最大的机械强度，因为无机和有机网络分别充分充当牺牲键和隐藏长度。采用优化的前驱体溶液制备了不同IL含量的DN离子凝胶膜，考察了DN离子凝胶膜的CO2渗透性能与IL含量的关系。具有95.2wt%IL的DN离子凝胶膜具有1380 barrer的CO2渗透性，其类似于纯IL膜预测的理论最大值的67%。DN离子凝胶膜的CO2渗透率随着IL含量的增加呈指数增加，并接近理论最大值。具有高强度的DN离子凝胶可用于通过赋予膜最大的IL电势来开发最大性能的IL基CO2分离膜。
To examine the potential of ion gels as materials for CO2 separation membranes, inorganic/organic double-network ion gel (DN ion gel) membranes with different ionic liquid (IL) contents were fabricated. The composition of the inorganic and organic networks was optimized to maximize the mechanical strength of the DN ion gel. The DN ion gel with an inorganic/organic network composition of 0.35 mol/mol showed the maximum mechanical strength because the inorganic and organic networks sufficiently acted as sacrificial bonds and hidden lengths, respectively. Using DN ion gel membranes with different IL contents prepared with the optimized precursor solution, the relationship between the CO2 permeability and IL content of the DN ion gel membranes was examined. The DN ion gel membrane with 95.2 wt% IL had a CO2 permeability of 1380 barrer, which was similar to 67% of the theoretical maximum predicted for the pure IL membrane. The CO2 permeability of the DN ion gel membrane exponentially increased with increasing IL content and approached the theoretical maximum. DN ion gels with high strength can be used to develop maximum-performance IL-based CO2 separation membranes by giving the membrane the maximum IL potential.