In this study, poly(vinyl alcohol) (PVA) hybrid membranes with zeolitic imidazolate framework-90 (ZIF-90) particles were fabricated by the viscosity-driven in situ self-assembly of ZIF-90 particles in a PVA matrix and were employed for ethanol dehydration via pervaporation (PV) technology. By this method, the size-controlled and well-distributed ZIF-90 particles were successfully embedded into PVA membranes. Based on the cross-linking reactions between the ZIF-90 particles and the PVA matrix, the ZIF-90/PVA hybrid membranes demonstrated higher mechanical strength, swelling resistance, and a high separation performance for ethanol dehydration. The ZIF-90/PVA hybrid membranes were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, X-ray diffractometry, thermogravimetric analysis, a mechanical test, and water contact angle measurements. The effects of the ZIF-90 particle size, loading level, thermal treatment temperature, operation temperature, and the feed compositions of the PVA hybrid membranes on the PV performance were systematically explored. Accordingly, the hybrid membranes exhibited excellent water permeability and selectivity for water–ethanol mixture separation. Specifically, the ZIF-90/PVA hybrid membrane (M-8), which was treated thermally at 130 °C, exhibited its optimal PV performance at a flux of 268 g/(m² h) and a separation factor of 1379 for the PV dehydration of the 90 wt% ethanol aqueous solution at 30 °C. The ZIF-90/PVA hybrid membranes exhibited excellent potential in the PV application for ethanol dehydration.

在这项研究中，通过在PVA基质中通过粘度驱动ZIF-90颗粒的原位自组装，制备了具有沸石咪唑酸酯骨架90（ZIF-90）颗粒的聚乙烯醇（PVA）杂化膜。用于通过全蒸发（PV）技术进行乙醇脱水。通过这种方法，将大小受控且分布均匀的ZIF-90颗粒成功嵌入到PVA膜中。基于ZIF-90颗粒与PVA基质之间的交联反应，ZIF-90 / PVA杂化膜表现出更高的机械强度，抗溶胀性和乙醇脱水的高分离性能。ZIF-90 / PVA杂化膜通过扫描电子显微镜，X射线光电子能谱，傅立叶变换红外光谱，X射线衍射法，热重分析，机械测试和水接触角测量。系统地研究了ZIF-90粒径，负载量，热处理温度，操作温度以及PVA杂化膜的进料组成对PV性能的影响。因此，杂化膜对水-乙醇混合物的分离具有优异的透水性和选择性。具体来说，在130°C的温度下进行热处理的ZIF-90 / PVA混合膜（M-8）在268 g /（m 杂化膜表现出优异的水渗透性和水-乙醇混合物分离的选择性。具体来说，在130°C的温度下进行热处理的ZIF-90 / PVA混合膜（M-8）在268 g /（m 杂化膜表现出优异的水渗透性和水-乙醇混合物分离的选择性。具体来说，在130°C的温度下进行热处理的ZIF-90 / PVA混合膜（M-8）在268 g /（m² h）的分离因子为1379，在30°C下对90 wt％的乙醇水溶液进行PV脱水。ZIF-90 / PVA杂化膜在PV应用中表现出极好的乙醇脱水潜力。