Interface compatibility is crucial to performance and robustness of nanocomposite membranes for molecular separation. In this work, a covalent crosslinking method was exploited to fabricate polydimethylsiloxane/metal-organic-frameworks (PDMS/MOFs) mixed matrix membranes with improved interfacial compatibility. Zirconium MOF particles (UiO-66-NH₂) were grafted with methoxysilane groups, which further formed covalent crosslinks with silanol terminated PDMS matrix. The strengthened interfacial compatibility prevented sedimentation and aggregation of MOF particles in PDMS precursor solution during the solvent evaporation process, thus the composites showed good membrane formation ability at high MOFs loading (60 wt%). Tensile strength of the hybrid membrane is 2.8 times improved while retaining good flexibility. Moreover, the CO₂/N₂ selectivity and CO₂ permeability of the PDMS composite membrane incorporated with 40 wt% UiO-66-MS particles are improved by 1.3 times and 0.7 times, respectively.

界面相容性对于用于分子分离的纳米复合膜的性能和耐用性至关重要。在这项工作中，开发了一种共价交联方法来制备具有改善的界面相容性的聚二甲基硅氧烷/金属有机骨架（PDMS / MOFs）混合基质膜。锆MOF颗粒（UiO-66-NH ₂）接枝甲氧基硅烷基团，进一步与硅烷醇封端的PDMS基质形成共价交联。增强的界面相容性可防止在溶剂蒸发过程中PDMS前体溶液中MOF颗粒的沉降和聚集，因此在高MOF含量（60 wt％）下，复合材料表现出良好的成膜能力。杂化膜的拉伸强度提高了2.8倍，同时保留了良好的柔韧性。此外，掺入40wt％UiO-66-MS颗粒的PDMS复合膜的CO ₂ / N ₂选择性和CO ₂渗透性分别提高了1.3倍和0.7倍。