In this study, NH₂-MIL-101(Al) metal-organic frameworks (MOFs) covered with 3-aminopropyltriethoxysilane (APTES) were incorporated into the polyethersulfone (PES) to produce mixed-matrix membranes (MMMs) for CO₂ separation. The APTES functionalization was performed to improve the MOF dispersion in the PES matrix. Different analyses such as X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and field emission scanning electron microscopy (FESEM) revealed that the MOFs surface successfully functionalized with APTES. An improvement in CO₂/CH₄ separation efficiency was observed in MMMs, and the performance shifted towards Robeson upper bounds. Notably, the membrane containing 10 wt.% S-MIL-5 (NH₂-MIL-101(Al) functionalized with 5.0 mL of APTES) showed an increment in CO₂ permeability (50%), and ideal CO₂/CH₄ selectivity (80%) compared to the PES membrane. The FTIR, TGA, FESEM, and DSC analyses constituted an excellent dispersion of MOFs within the PES phase, which led to significant development in gas permeability and selectivity.

在这项研究中，将覆盖有 3-氨基丙基三乙氧基硅烷 (APTES) 的NH ₂ -MIL-101(Al) 金属有机骨架 (MOF) 结合到聚醚砜 (PES) 中，以生产用于 CO ₂分离的混合基质膜 (MMM) 。进行 APTES 功能化以改善 MOF 在 PES 基质中的分散。X 射线衍射 (XRD)、Brunauer-Emmett-Teller (BET)、傅里叶变换红外 (FTIR) 光谱、热重分析 (TGA) 和场发射扫描电子显微镜 (FESEM) 等不同分析表明，MOFs 表面成功用 APTES 功能化。CO ₂ /CH ₄的改进在 MMM 中观察到分离效率，并且性能向 Robeson 上限转移。值得注意的是，含有 10 wt.% S-MIL-5（NH ₂ -MIL-101(Al) 用 5.0 mL APTES 功能化）的膜显示出 CO ₂渗透性增加（50%），并且理想的 CO ₂ /CH ₄与 PES 膜相比的选择性 (80%)。FTIR、TGA、FESEM 和 DSC 分析构成了 MOF 在 PES 相中的良好分散，这导致了气体渗透性和选择性的显着发展。