Interfacial defect caused by the poor dispersibility of filler particles has been a major obstacle in the application of mixed matrix membranes (MMMs). Improving the fillers dispersibility is an effective approach to improve the separation performance. In this work, for the purpose of preparing defect-free MMMs, a pre-crosslinking strategy was proposed to covalently connect the fillers to the polymer. Such covalently connection realized by the reaction between the additional carboxyl group of the MOF-801 and the hydroxyl group of Polyvinyl alcohol (PVA). The newly reacted ester group, confirmed by Fourier Transform Infrared (FTIR), was identified as a bridge between MOF-801 and PVA. This bridge provides a strong bond between the two and avoids agglomeration between the MOF particles. The uniform distribution of Zr elements observed in the Energy Dispersive Spectrometer (EDS) mapping further confirms that the MOF-801 particles are well dispersed in the MMMs. The prepared membranes exhibited a superior water flux of 3354 g m⁻² h⁻¹ for 90 wt % ethanol/water separation at 343 K and excellent stability in 92 h experiment. This study provides an inspiration for mitigating excessive particle agglomeration in MMMs.

填料颗粒分散性差引起的界面缺陷一直是混合基质膜（MMM）应用的主要障碍。提高填料的分散性是提高分离性能的有效途径。在这项工作中，为了制备无缺陷的MMM，提出了一种预交联策略，将填料与聚合物共价连接。这种共价连接是通过 MOF-801 的额外羧基与聚乙烯醇 (PVA) 的羟基之间的反应实现的。新反应的酯基经傅里叶变换红外 (FTIR) 证实，被鉴定为 MOF-801 和 PVA 之间的桥梁。这座桥梁在两者之间提供了牢固的联系，并避免了两者之间的聚集MOF 颗粒。能量色散光谱仪 (EDS) 图中观察到的 Zr 元素的均匀分布进一步证实 MOF-801 颗粒在 MMM 中良好分散。所制备的膜在343 K下对于90  wt %乙醇/水分离表现出3354 g m ^-2  h ^-1的优异水通量，并且在92小时实验中表现出优异的稳定性。这项研究为减轻 MMM 中的过度颗粒团聚提供了启发。