The CO₂-philic properties of powdered fluorinated triazine frameworks make them promising candidates for fabrication of porous CO₂ separation membranes. This is rarely reported because of lack of suitable synthetic approaches. Here, fluorinated membranes based on covalent triazine frameworks are prepared through a rational design of aromatic nitrile monomers containing fluorine and ether groups via a sol-gel polymerization process. The CO₂ separation performance rises significantly with the fluorine content in the membrane. With functionalized triazine units, fluorine, and ether groups, these carbon molecular sieve membranes obtained after pyrolysis exhibit intrinsic ultra-micropores, high surface areas and excellent thermal stability under air. Excellent CO₂ permeability and CO₂ to N₂ selectivity surpassing the Robeson upper bound are achieved. Our general design and synthesis protocol allow an easy access to fluorinated porous membranes, thus significantly expanding the currently limited library of CO₂-philic and chemically stable membranes for highly efficient CO₂ separation.

粉末状氟化三嗪骨架的亲CO ₂特性使其成为制造多孔CO ₂分离膜的有希望的候选者。由于缺乏合适的合成方法，很少报道。在这里，基于共价三嗪骨架的氟化膜是通过溶胶-凝胶聚合工艺合理设计含有氟和醚基的芳族腈单体而制备的。随着膜中氟的含量，CO ₂分离性能显着提高。具有功能化的三嗪单元，氟和醚基，热解后获得的这些碳分子筛膜表现出固有的超微孔，高表面积和在空气中的出色热稳定性。优秀的CO获得了超过Robeson上限的₂渗透率和CO ₂ -N ₂选择性。我们的一般设计和合成方案可轻松访问氟化多孔膜，从而显着扩展了目前有限的亲CO ₂和化学稳定膜库，可实现高效CO ₂分离。