Abstract New types of mixed matrix membranes (MMMs) were fabricated by incorporating Zr-MOF (UiO-66-NH2 and UiO-66-NH3+Cl-) filler into polyamide 6 (PA 6) polymer, enabling efficient natural gas dehydration. All membranes were characterized and applied for H2O/CH4 mixtures separation at 1 bar pressure difference at 30 °C. It was found that the Zr-MOF nanoparticles in a size range of 0.4–0.5 μm were successfully incorporated into the high permeability polymer PA 6 to obtain MMMs with 10–30 wt% particle loadings. MMMs loaded with 25 wt% of UiO-66-NH3+Cl- and 20 wt% of UiO-66-NH2 demonstrated ultrahigh H2O/CH4 selectivity of 747.7 and 687.4, respectively, and enhanced H2O permeability as well as H2O/CH4 selectivity compared with the pure PA 6 polymer. The excellent membrane performance attributed to direct and extensive hydrogen bonds between the polymer and MOFs. This type of MMMs could be an alternative for further research in H2O/CH4 separation at industrial scale.

中文翻译：

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用于高效天然气脱水的氢键聚酰胺 6/Zr-MOF 混合基质膜

摘要 通过将 Zr-MOF (UiO-66-NH2 和 UiO-66-NH3+Cl-) 填料掺入聚酰胺 6 (PA 6) 聚合物中，制备了新型混合基质膜 (MMM)，实现了天然气高效脱水。对所有膜进行表征并应用于 30 °C 和 1 bar 压差下的 H2O/CH4 混合物分离。结果表明，尺寸范围为 0.4-0.5 μm 的 Zr-MOF 纳米粒子成功地结合到高渗透性聚合物 PA 6 中，以获得具有 10-30 wt% 颗粒负载的 MMM。负载 25 wt% UiO-66-NH3+Cl- 和 20 wt% UiO-66-NH2 的 MMMs 分别表现出 747.7 和 687.4 的超高 H2O/CH4 选择性，并增强了 H2O 渗透性以及 H2O/CH4 选择性使用纯 PA 6 聚合物。优异的膜性能归因于聚合物和 MOF 之间的直接和广泛的氢键。这种类型的 MMM 可以作为工业规模进一步研究 H2O/CH4 分离的替代方案。