In our study, the synthesis of zeolitic imidazolate framework (ZIF-12) crystals and the preparation of mixed matrix membranes (MMMs) with various ZIF-12 loadings were targeted. The characterization of ZIF-12 and MMMs were carried out by Fourier transform infrared spectroscopy analysis, thermogravimetric analysis, scanning electron microscopy (SEM), and thermomechanical analysis. The performance of MMMs was measured by the ability of binary gas separation. Commercial polyetherimide (PEI-Ultem ® 1000) polymer was used as the polymer matrix. The solution casting method was utilized to obtain dense MMMs. In the SEM images of ZIF-12 particles, the particles with a rhombic dodecahedron structure were identified. From SEM images, it was observed that the distribution of ZIF-12 particles in the MMMs was homogeneous and no agglomeration was present. Gas permeability experiments of MMMs were measured for H 2 , CO 2 , and CH 4 gases at steady state, at 4 bar and 35 °C by constant volume-variable pressure method. PEI/ZIF-12-30 wt% MMM exhibited high permeability and ideal selectivity values for H 2 /CH 4 and CO 2 /CH 4 were PH2/CH4=331.41${P}_{{\text{H}}_{2}/{\text{CH}}_{4}}=331.41$ and PCO2/CH4=53.75${P}_{{\text{CO}}_{2}/{\text{CH}}_{4}}=53.75$ gas pair.

中文翻译：

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混合基质膜中新型金属-有机骨架（沸石咪唑酸酯骨架[ZIF-12]）对结构，形态和气体分离性能的影响

在我们的研究中，目标是合成沸石咪唑盐骨架（ZIF-12）晶体和制备具有各种ZIF-12负载量的混合基质膜（MMM）。ZIF-12和MMM的表征通过傅里叶变换红外光谱分析，热重分析，扫描电子显微镜（SEM）和热机械分析进行。MMM的性能是通过二元气体分离的能力来衡量的。使用商用聚醚酰亚胺（PEI-Ultem®1000）聚合物作为聚合物基质。利用溶液浇铸法获得致密的MMM。在ZIF-12颗粒的SEM图像中，鉴定出具有菱形十二面体结构的颗粒。从SEM图像中，观察到ZIF-12颗粒在MMM中的分布是均匀的，并且不存在团聚。通过恒定体积可变压力法，在4 bar和35°C的稳态下，对MMM的H 2，CO 2和CH 4气体的透气性实验进行了测量。PEI / ZIF-12-30 wt％MMM表现出高渗透性，H 2 / CH 4和CO 2 / CH 4的理想选择性值为PH2 / CH4 = 331.41 $ {P} _ {{\ text {H}} __ 2} / {\ text {CH}} _ {4}} = 331.41 $和PCO2 / CH4 = 53.75 $ {P} _ {{\ text {CO}} _ {2} / {\ text {CH}} _ {4}} = 53.75 $汽油对。