In order to enhance the permeance of the acid resistance membrane, an ionic liquid (IL) regulating strategy was proposed to rearrange the interfacial polymerization process. Herein, we revisited polyethylenimine (PEI) and cyanuric chloride (CC) as the pristine acid-resistant membrane. 1-aminopropyl-3-methylimidazolium chloride ([AEMIm][Cl]) and 1-aminopropyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide ([AEMIm][Tf₂N]) ILs were used to regulate the interfacial polymerization process. Molecular dynamic (MD) simulation was used to reveal IL and PEI diffusion behavior in aqueous solution, membrane pore size distribution, and porosity. The effects of ILs on membrane surface morphology, surface zeta potential, chemical composition, and separation property were analyzed. The IL regulating strategy endow the membrane with uniform smaller pore and higher porosity, thus improved membrane permeance and selectivity simultaneously. For the [AEMIm][Cl] IL, the corresponding AEMIC-PEI-CC membrane showed high permeance of 79.1 L m⁻²h⁻¹bar⁻¹, which is 1.36 times the pristine PEI-CC membrane, combined with high Y³⁺ rejection of 97.5%, low H⁺ rejection of 1.35%. In addition, this membrane showed good acid stability in 30 days long-term test.

为了提高耐酸性膜的渗透性，提出了一种离子液体（IL）调节策略来重新排列界面聚合过程。在此，我们重新审视了聚乙烯亚胺 (PEI) 和氰尿酰氯 (CC) 作为原始耐酸膜。1-氨基丙基-3-甲基咪唑鎓氯化物 ([AEMIm][Cl]) 和 1-氨基丙基-3-甲基咪唑鎓双((三氟甲基)磺酰基)亚胺 ([AEMIm][Tf ₂N]) ILs 用于调节界面聚合过程。分子动力学 (MD) 模拟用于揭示 IL 和 PEI 在水溶液中的扩散行为、膜孔径分布和孔隙率。分析了离子液体对膜表面形态、表面zeta电位、化学成分和分离性能的影响。IL调节策略使膜具有均匀的小孔和更高的孔隙率，从而同时提高了膜的渗透性和选择性。对于 [AEMIm][Cl] IL，相应的 AEMIC-PEI-CC 膜显示出 79.1 L m ^-2 h ^-1 bar ^{-1 的}高渗透性，是原始 PEI-CC 膜的 1.36 倍，并结合高 Y ^{3 +}拒绝率为 97.5%，低 H ⁺拒绝率 1.35%。此外，该膜在30天的长期测试中显示出良好的酸稳定性。