Immobilizing an ionic liquid (IL) on a metal-organic framework (MOF) is proposed as a novel selective and CO₂ facilitated transport material to improve gas perm-selectivity and plasticization pressure of Matrimid-based mixed matrix membranes (MMM) for CO₂/CH₄ separation. NH₂-MIL-101(Cr) was synthesized and then impregnated with 1-butyl-3-methyl imidazolium bis(trifluoromethanesulfonyl)imide ([Bmim][Tf₂N]) to prepare IL@NH₂-MIL-101(Cr). The particles were analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) analysis, and scanning/transmission electron microscopy (SEM/TEM). The particles were then dispersed in Matrimid to prepare MMM with 3, 5, and 7 wt.% contents. The membranes microstructure was investigated by FTIR and XRD, and the uniformity of MOF distribution was examined by SEM. Differential scanning calorimetry (DSC) displayed an increase in glass transition temperature (T_g) for the MMM associated with the polymer chains rigidification in the polymer/filler interphase. Permeation experiments showed that maximum separation performance was found for the MMM containing 7 wt.% IL@NH₂-MIL-101 with increased CO₂ permeability (162%) and CO₂/CH₄ selectivity (224%) over pristine Matrimid. This MMM increased plasticization pressure of the Matrimid membrane from 12 to 25 bar. Tensile strength and Young's modulus of the optimum MMM were 25% and 37% higher than those of pristine Matrimid membrane, respectively.

提出将离子液体 (IL) 固定在金属有机骨架 (MOF) 上作为一种新型选择性和 CO ₂促进传输材料，以提高基于基质酰亚胺的混合基质膜 (MMM) 对 CO _{2 的}气体渗透选择性和塑化压力/CH ₄分离。合成NH ₂ -MIL-101(Cr)，然后用1-丁基-3-甲基咪唑鎓双(三氟甲磺酰基)酰亚胺([Bmim][Tf ₂ N])浸渍制备IL@NH ₂-MIL-101(Cr)。通过 X 射线衍射 (XRD)、X 射线光电子能谱 (XPS)、傅里叶变换红外光谱 (FTIR)、Brunauer-Emmett-Teller (BET) 分析和扫描/透射电子显微镜 (SEM/TEM) 分析颗粒）。然后将颗粒分散在基质中以制备含量为 3、5 和 7 重量％的 MMM。通过FTIR和XRD研究了膜的微观结构，并通过SEM检查了MOF分布的均匀性。差示扫描量热法 (DSC) 显示MMM 的玻璃化转变温度 (T _g ) 增加，这与聚合物/填料界面中的聚合物链硬化有关。渗透实验表明，含有 7 wt.% IL@NH ₂的 MMM 具有最大分离性能-MIL-101 与原始 Matrimid 相比具有增加的 CO ₂渗透性 (162%) 和 CO ₂ /CH ₄选择性 (224%)。这种 MMM 将 Matrimid 膜的塑化压力从 12 巴增加到 25 巴。最佳 MMM 的拉伸强度和杨氏模量分别比原始 Matrimid 膜高 25% 和 37%。