Preparation of MOF / PA Layered Thin‐Film Composite Membranes With Abundant Hollow Nodular Networks Using the Dynamic Interface Induced by Suction

Thin film composite (TFC) membranes have been used as key separation materials in water treatment. In this work, we constructed a dynamic interface by introducing porous MOF layers as the gutter layer coupling with an external suction force for preparing zeolitic imidazolate framework‐8/polyamide layered thin‐film composite membranes (ZIF‐8/TFC membranes) with abundant hollow nodular networks. The porous ZIF‐8 layer not only regulated the diffusion of the aqueous monomer, but also reduced the influence of the suction force on the oil–water reaction interface. The characteristic hollow nodular networks of the PA layer were enhanced by the dynamic interface induced by suction filtration, which was beneficial for increasing the water flux of membranes. Thus, the ZIF‐8/TFC‐2 membranes with a water contact angle of 50.1°, a surface roughness of 32.69 nm, and an average pore size of 0.704 nm possessed good performance in separating industrial reactive dyes with water permeance of 13.5 L m −2 h −1 bar −1 , even for the real printing and dyeing wastewater treatment. This work presented a unique study on the mechanism by which the state of the oil–water reaction interface affected the structure of the membrane.