Pyridine is generally found in the effluents from the synthesis of paints, rubber chemicals, vitamins, and pesticides. This study focused on improving the pervaporation (PV) performance of polyether block-amide (PEBA-2533) membranes cast on polyvinylidene fluoride (PVDF) substrate, by incorporating the MIL-53 (Al) particles to prepare mixed matrix membranes (MMMs) for pyridine separation from the aqueous solution. MIL-53 (Al) has a larger aperture size (8.5 Å) than the molecular size of the pyridine (6.0 Å), which could allow pyridine molecules to efficiently pass through its channels. The coadjacent MIL-53 particles created relatively continuous permeation pathways for the penetrants in the MMMs, which substantially enhanced the separation performance. Impressively, the resultant MMMs displayed superior pyridine separation performance at complex conditions. At 65 °C and 0.5 wt% pyridine aqueous solution, the separation factor and pyridine flux of PEBA/PVDF membrane were 17.3 and 143.5 g m⁻² h⁻¹, which were improved using MIL-53@PEBA/PVDF MMMs to 48.1 and 226.9 g m⁻² h⁻¹, respectively. Owing to the enhanced pyridine affinity, hydrophobic property, and thermal robustness, the resultant MMMs overcame the inherent trade-off between selectivity and permeability, and also displayed the promising long-term stability. These findings may provide valuable insights for developing novel MMMs with superior separation performance.

吡啶通常存在于油漆、橡胶化学品、维生素和农药合成的废水中。本研究的重点是提高渗透蒸发（PV）性能将聚醚嵌段酰胺 (PEBA-2533) 膜浇铸在聚偏二氟乙烯 (PVDF) 基材上，通过掺入 MIL-53 (Al) 颗粒来制备混合基质膜 (MMM)，用于从水溶液中分离吡啶。MIL-53 (Al) 的孔径尺寸 (8.5 Å) 比吡啶分子尺寸 (6.0 Å) 更大，这可以让吡啶分子有效地通过其通道。相邻的 MIL-53 颗粒为 MMM 中的渗透剂创建了相对连续的渗透路径，从而大大增强了分离性能。令人印象深刻的是，所得的 MMM 在复杂条件下表现出优异的吡啶分离性能。在65 ℃和0.5 wt%吡啶水溶液下，PEBA/PVDF膜的分离因子和吡啶通量分别为17.3和143.5 g m ^-2  h^-1，使用 MIL-53@PEBA/PVDF MMM 分别改进至 48.1 和 226.9 g m ^-2  h ^-1。由于增强的吡啶亲和力、疏水性和热鲁棒性，所得的MMM克服了选择性和渗透性之间固有的权衡，并且还表现出了有希望的长期稳定性。这些发现可能为开发具有卓越分离性能的新型 MMM 提供有价值的见解。