The fabrication of membranes with high CO₂ separation performances is an urgent need for clean energy supply and environmental remediation. In this work, the mono-(6-ethanediamine-6-deoxy)-β-cyclodextrin (MEDβCD) fillers are intentionally constructed to tailor the polyamide membranes (MEDβCD/PA) by interfacial polymerization (IP) for CO₂ separation. The unique hollow cone structure of MEDβCD alleviates the vigorous IP process, generating a thinner separation layer with larger chain d-spacing. Additionally, the introduction of CO₂-philic groups from MEDβCD can facilitate CO₂ molecule transport. The fabricated MEDβCD/PA membrane exhibits remarkable increases in CO₂ permeance, CO₂/H₂, CO₂/N₂, and CO₂/CH₄ selectivities, which are 39, 17, 11, and 25 times higher than those of the pure PA membrane, respectively. This work provides a straightforward route to fabricate composite membranes tailored by macrocyclic molecules with cone structures and other cavitands for gas separation.

制备具有高CO ₂分离性能的膜是清洁能源供应和环境修复的迫切需要。在这项工作中，特意构建了单-(6-乙二胺-6-脱氧)-β-环糊精 (MEDβCD) 填料，通过界面聚合 (IP) 定制聚酰胺膜 (MEDβCD/PA) 用于 CO ₂分离。MEDβCD 独特的空心锥结构缓解了剧烈的 IP 过程，产生更薄的分离层和更大的链 d 间距。此外，从 MEDβCD 中引入亲 CO _{2基团可以促进 CO 2}分子转运。制备的 MEDβCD/PA 膜的 CO ₂渗透率（CO ₂ /H ）显着增加₂、CO ₂ /N ₂和CO ₂ /CH ₄选择性分别是纯PA膜的39、17、11和25倍。这项工作为制造由具有锥形结构的大环分子和其他气穴用于气体分离的复合膜提供了一条直接的途径。