Fig. 1: Membrane fabrication.
From: Assembling covalent organic framework membranes with superior ion exchange capacity
a Schematic illustration of the TpBD-(SO3H)2 iCOFMs fabrication process. b Cross-sectional SEM image, surface SEM image and surface AFM images of the TpBD-(SO3H)2 iCOFMs. c Solid-state 13C NMR spectra of the TpBD-(SO3H)2 iCOFMs.
