CO2 separation membranes using ionic liquids in a Nafion matrix
CO2 separation membranes using ionic liquids in a Nafion matrix
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DOI：
10.1016/j.memsci.2010.07.013
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发表时间：
2010-11
影响因子：
9.5
通讯作者：
Soondong Yoo;J. Won;S. Kang;Y. Kang;S. Nagase
中科院分区：
文献类型：
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作者：
Soondong Yoo;J. Won;S. Kang;Y. Kang;S. Nagase
使用离子液体 (IL) 和 Nafion 开发了用于 CO2 分离的 Nafion 复合膜，具有良好的 CO2/CH4 分离因子。通过使用聚砜不对称载体上的离子液体膜测量 CO2 分离性能来表征三种含有不同阴离子的 1-正己基-3-甲基咪唑鎓 ([hmim]) 阳离子的离子液体。为了提高液膜的稳定性，通过将IL吸附在致密的电纺Nafion/聚环氧乙烷复合膜上，制备了两种不同的用于CO2分离膜的含Nafion膜的IL。通过静电纺丝技术制备含有聚环氧乙烷的电纺Nafion层，以便将[hmim][BF4]（或[hmim][PF6]）固定在多孔聚砜不对称载体上。 [hmim][BF4]电纺Nafion复合膜理想的CO2/CH4分离因子与[hmim][BF4]一致。对于致密 Nafion 层中同时含有 [hmim][BF4] 和 [hmim][PF6] 的 Nafion 复合膜，理想的 CO2/CH4 分离因子为 26，这意味着在 IL 存在下 Nafion 微域发生变化，以及 IL 对通过 IL 膨胀的 Nafion 膜分离 CO2 的促进作用。
Nafion composite membranes for CO2separation with good CO2/CH4separation factors were developed using ionic liquids (ILs) and Nafion. Three ionic liquids containing the 1-n-hexyl-3-methylimidazolium ([hmim]) cation with different anions were characterized by the measurement of the CO2separation performance using supported ionic liquid membranes in a polysulfone asymmetric support. Two different Nafion membrane-containing ILs for CO2separation membranes were prepared by the adsorption of IL on a dense and electrospun Nafion/polyethyleneoxide composite membrane in order to improve the stability of the liquid membrane. The electrospun Nafion layer containing polyethyleneoxide was prepared by the electrospinning technique in order to affix [hmim][BF4] (or [hmim][PF6]) on the porous polysulfone asymmetric support. The ideal CO2/CH4separation factor of electrospun Nafion composite membranes with [hmim][BF4] was consistent with that of [hmim][BF4]. The ideal CO2/CH4separation factor was 26 for the Nafion composite membranes containing both [hmim][BF4] and [hmim][PF6] in the dense Nafion layer, implying a change in the microdomain of Nafion in the presence of IL and the facilitation effect of ILs for CO2separation through the IL-swollen Nafion membrane.