Trade-off between permeability and nanometer-level selectivity is an inherent shortcoming of membrane-based separation of molecules, while most highly porous materials with high adsorption capacity lack solution processability and stability for achieving adsorption-based molecule separation. We hereby report a hydrophilic amidoxime modified polymer of intrinsic microporosity (AOPIM-1) as a membrane adsorption material to selectively adsorb and separate small organic molecules from water with ultrahigh processing capacity. The membrane adsorption capacity for Rhodamine B reaches 26.114 g m⁻², 10–1000 times higher than previously reported adsorptive membranes. Meanwhile, the membrane achieves >99.9% removal of various nano-sized organic molecules with water flux 2 orders of magnitude higher than typical pressure-driven membranes of similar rejections. This work confirms the feasibility of microporous polymers for membrane adsorption with high capacity, and provides the possibility of adsorptive membranes for molecular separation.

渗透性和纳米级选择性之间的权衡是基于膜的分子分离的固有缺点，而大多数具有高吸附能力的高多孔材料缺乏溶液可加工性和实现基于吸附的分子分离的稳定性。我们在此报道了一种具有固有微孔隙率的亲水性偕胺肟改性聚合物 (AOPIM-​​1) 作为膜吸附材料，可选择性地从水中吸附和分离有机小分子，具有超高的处理能力。膜对罗丹明B的吸附量达到26.114 g m ⁻², 比以前报道的吸附膜高 10-1000 倍。同时，该膜实现了 >99.9% 的各种纳米级有机分子去除率，水通量比类似截留率的典型压力驱动膜高 2 个数量级。该工作证实了微孔聚合物用于高容量膜吸附的可行性，为分子分离的吸附膜提供了可能性。