Mixed matrix membranes (MMMs) were fabricated by incorporating carboxylated multi-walled carbon nanotubes (MWCNTs) into a poly (arylene fluorene ether ketone) that contained amino groups (Am-PAFEK) matrix to improve CO₂ separation performance. The combination of MWCNTs and Am-PAFEK exerted a favorable synergistic effect on the permeability and selectivity of membranes. The extraordinary smooth wall of MWCNTs acts as a highway through which gas passes, providing better permeability. The Am-PAFEK matrix itself has a dense internal structure that provides high gas selectivity. MWCNTs particles evenly distributed among the Am-PAFEK membrane due to the non-covalent bond interaction between the amino and carboxyl group. Efficient CO₂ transport pathways were constructed by homogeneous dispersion of MWCNTs with in MMMs, leading to maintained good selectivity and enhanced permeability. When the amount of carbon nanotubes added was 3 wt.%, that increased by above 60% in comparison to the Am-PAFEK membrane permeability, the CO₂/CH₄ and CO₂/N₂ selectivity of the Am-PAFEK/MWCNTs-3% membrane achieved 35.02 and 30.09, respectively. Therefore, the strategy of blending MWCNTs with Am-PAFEK exhibited a promising approach for improving gas permeability.

通过将羧基化的多壁碳纳米管（MWCNT）掺入含有氨基（Am-PAFEK）的聚亚芳基芴醚酮中来制备混合基质膜（MMM），以提高CO ₂分离性能。MWCNT和Am-PAFEK的组合对膜的渗透性和选择性发挥了良好的协同作用。MWCNT的非凡光滑壁充当气体通过的高速公路，提供了更好的渗透性。Am-PAFEK基质本身具有致密的内部结构，可提供高的气体选择性。由于氨基和羧基之间的非共价键相互作用，MWCNTs颗粒均匀地分布在Am-PAFEK膜之间。高效CO ₂通过在MMM中均匀分散MWCNT来构建运输通道，从而保持了良好的选择性和增强的渗透性。当碳纳米管的添加量为3 wt。％时，与Am-PAFEK膜渗透率相比，其增加了60％以上，Am-PAFEK / MWCNTs-的CO ₂ / CH ₄和CO ₂ / N ₂选择性3％的膜分别达到35.02和30.09。因此，将MWCNT与Am-PAFEK共混的策略显示出改善气体渗透性的有前途的方法。