Zwitterionic deep eutectic solvent membranes (ZDESMs) hold great promise in molecular separations yet have rarely been reported. Herein, for the first time, ZDESMs are constructed by zwitterionic deep eutectic solvent (ZDES) and ethylene-transport carrier (silver salt) for ethylene/ethane separation. Experiments and simulations reveal that the ZDESMs possess structural nano-heterogeneity with discrete zwitterionic nanodomains and interconnected carrier channels, thus flexibly regulating the carrier spatial distribution as well as promoting carrier activity and stability synchronously. The ZDESMs acquires high ethylene permeability, ethylene/ethane selectivity at low carrier concentration, and long-term stability, which is superior to most of the-state-of-the-art ethylene/ethane separation membranes. The proposed ZDESMs expand the membrane family, and the nano-heterogeneity design and visualization of membrane structure will offer valuable guidance on developing advanced membranes for energy-intensive gas separations.

两性离子低共熔溶剂膜 (ZDESM) 在分子分离方面具有广阔前景，但鲜有报道。在此，ZDESM 首次由两性离子低共熔溶剂 (ZDES) 和乙烯传输载体（银盐）构建，用于乙烯/乙烷分离。实验和模拟表明，ZDESM 具有结构纳米异质性，具有离散的两性离子纳米域和相互连接的载流子通道，从而灵活地调节载流子空间分布并同步促进载流子活性和稳定性。ZDESMs 具有高乙烯渗透性、低载流子浓度下的乙烯/乙烷选择性和长期稳定性，优于大多数最先进的乙烯/乙烷分离膜。拟议的 ZDESM 扩展了膜家族，