Turing covalent organic framework membranes via heterogeneous nucleation synthesis for organic solvent nanofiltration.

ABSTRACT: Although covalent organic frameworks (COFs) demonstrate notable potential for developing advanced separation membranes, contemporary COF membranes still lack controlled stacking and highly efficient sieving. Here, Turing-architecture COF membranes were constructed by engineering a reaction-diffusion assembly process via heterogeneous nucleation synthesis with tannic acid (TA). TA covalently binds with amine monomers to form a composite precursor with increased reactivity and decreased diffusivity. This altered the pathway of Schiff base reactions with aldehyde monomers, fulfilling suitable reaction-diffusion conditions, and ultimately formed the labyrinthine stripe or spot-patterned Turing COF film with controlled stacking and uniform pore structure. This endows our COF membrane with highl

SUBMITTER: Yang F 

PROVIDER: S-EPMC11633759 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature