Interfacial polymerization (IP) is a promising approach for preparing covalent organic framework (COF) membranes in energy storage and conversion applications. However, it is a great challenge for traditional IP with water-organic phase to obtain pre-designable and robust COF membranes. Herein, a "one-pot" organic-organic IP/in situ integration approach, constructing three typical β-ketoenamine COF composite membranes with a maximum area of > 600 cm2, are reported. The dual organic phases exhibit comprehensive solubility to precursors, facilitating the synthesis of more types of COFs. In this "one-pot" approach, the porous supporting substrate is in situ formed underneath the COF layer via variable-temperature evaporation of two organic solutions without transfer process. It makes some substrate polymers embedded into the COF layer and accomplishes the interlock of two layers at the interface, producing a robust composite membrane. The prepared COF composite membrane exhibits effective sieving capability for Na+/Mg2+ and achieves a maximum power density of over 1 W m−2 in the reverse electrodialysis power generation, even using the Na+/Mg2+ mixed solution. This approach allows for preferably customization of membrane structures, which can expand the applications of COF membranes in separation.

中文翻译：

---

可扩展制造具有选择性离子传输的集成共价有机框架膜，用于有效的盐度梯度能量收集


界面聚合（IP）是一种在能量存储和转换应用中制备共价有机骨架（COF）膜的有前景的方法。然而，对于传统的水-有机相IP来说，获得可预先设计且坚固的COF膜是一个巨大的挑战。本文报道了一种“一锅”有机-有机IP/原位集成方法，构建了三种典型的β-酮烯胺COF复合膜，最大面积为> 600 cm2。双有机相对前驱体表现出全面的溶解性，有助于合成更多类型的COF。在这种“一锅”方法中，多孔支撑基板通过两种有机溶液的变温蒸发在COF层下方原位形成，无需转移过程。它将一些基底聚合物嵌入COF层中，并在界面处实现两层的互锁，从而产生坚固的复合膜。所制备的COF复合膜对Na+/Mg2+表现出有效的筛分能力，即使使用Na+/Mg2+混合溶液，在反向电渗析发电中也能实现超过1 W m−2的最大功率密度。这种方法允许更好地定制膜结构，这可以扩展COF膜在分离中的应用。