Unstable interlayer spacing of lamellar membranes would be rapidly compressed and narrowed under normal high flowrates and concentration polarization effect contributes to reduced permeation and fouling resistance. Herein, a large permeability PEG/MXene@MOF membrane with stable interlayer spacing and superior antifouling property was created via facile interface self-assembly strategy. Metal-organic framework (MOF, UiO-66-NH₂) nanoparticles as supports constructed an intercalation-induced structure with hierarchical Ti₃C₂T_x (MXene) nanosheets, which effectively regulated the interlayer spacing and improved permeability. Hydrophilic polyethylene glycol (PEG) further enhanced the stability of intercalation structure via hydrogen bonding, so that the PEG/MXene@MOF membrane demonstrated excellent swelling resistance with an average layer spacing expansion of only 0.05 nm even after immersion in water for 8 days. Moreover, MOF particles increased the lamellar roughness and interlayer water retention capacity, resulting in the PEG/MXene@MOF membrane with remarkable separation selectivity and powerful fouling resistance (UWOCA >156°, UWOSA <5.5°). Regarding the purification of oil-in-water emulsions stabilized by surfactants, the PEG/MXene@MOF membrane exhibited extremely stable high permeability (1246 ± 12 L m⁻² h⁻¹ bar⁻¹) and excellent efficiency (>99.7 %), even during continuous separation of high-viscosity crude oil emulsions for 60 min. In addition, the PEG/MXene@MOF membrane also exhibited superior chemical durability and mechanical robustness in strong-corrosiveness and high-salty environments (72 h), ultrasonic treatments (120 min), bending experiments (100 times) and abrasion tests (20 times). Therefore, this work provided a promising strategy to construct highly permeable membrane with stable interlayer spacing and efficient fouling resistance for practical oily wastewater purification.

不稳定的层状膜层间距在正常高流量下会迅速压缩变窄，浓差极化效应导致渗透和抗污染能力降低。在此，通过简单的界面自组装策略创建了具有稳定层间距和优异防污性能的大渗透性PEG/MXene@MOF膜。金属有机骨架（MOF，UiO-66-NH _{2 ）纳米粒子作为载体构建了具有分层Ti 3} C ₂ T _x (MXene)纳米片的插层诱导结构，有效调节层间距并提高渗透性。亲水性聚乙二醇（PEG）通过氢键进一步增强插层结构的稳定性，使得PEG/MXene@MOF膜表现出优异的抗溶胀性，即使在水中浸泡8天后，平均层间距膨胀仅为0.05 nm。此外，MOF颗粒增加了层状粗糙度和层间保水能力，使PEG/MXene@MOF膜具有显着的分离选择性和强大的抗污染能力（UWOCA>156°，UWOSA<5.5°）。对于表面活性剂稳定的水包油乳液的纯化，PEG/MXene@MOF膜表现出极其稳定的高渗透率（1246 ± 12 L m -2 h -1 bar -1 ）和优异的效率^（  > ^99.7 % ^），即使在连续分离高粘度原油乳液 60 分钟的过程中也是如此。此外，PEG/MXene@MOF膜在强腐蚀和高盐环境（72小时）、超声波处理（120分钟）、弯曲实验（100次）和磨损测试（20次）中还表现出优异的化学耐久性和机械鲁棒性。次）。因此，这项工作为构建具有稳定层间距和高效抗污染能力的高渗透膜用于实际含油废水净化提供了一种有前途的策略。