Flexible, Mechanically Stable, Porous Self?Standing Microfiber Network Membranes of Covalent Organic Frameworks: Preparation Method and Characterization

Covalent organic frameworks (COFs) show advantageous characteristics, such as an ordered pore structure and a large surface area for gas storage separation, energy storage, catalysis, molecular separation. However, COFs usually exist difficult-to-process powders, preparing continuous, robust, flexible, foldable, rollable COF membranes is still challenge. Herein, with fiber morphology the first time prepared via newly introduced template-assisted framework process are reported. This method uses electrospun porous polymer sacrificial dimension template making self-standing membranes. The membranes, besides having high crystallinity, also (1153 m2 g?1), good mechanical stability, excellent thermal flexibility. study opens up possibility of preparation their derivatives in simple way hence shows promise technical applications future.