3D Printing of Covalent Organic Frameworks: A Microfluidic-Based System to Manufacture Binder-Free Macroscopic Monoliths
Abstract
Covalent organic frameworks (COFs) have witnessed outstanding developments in the past 15 years, particularly in optimizing their pore structures, linkages, and variety of monomers used in their synthesis. Yet, a significant challenge remains unaddressed: the processability of COFs into macroscopic architectures with arbitrary shapes, as they are typically obtained as unprocessable powders. This study presents a novel strategy to address this issue by developing a 3D printable ink comprising a colloidal water suspension of COF nanoparticles. A microfluidic device is engineered that provides precise control over the gelation process of the COF-based ink, allowing for a layer-by-layer fabrication. As a result, the direct production of large-scale binder-free COF architectures from digital designs is achieved at room temperature and atmospheric pressure while eliminating the use of toxic organic solvents. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000649809Publication status
publishedExternal links
Journal / series
Advanced Functional MaterialsPages / Article No.
Publisher
Wiley-VCHSubject
3D printing; covalent organic frameworks; inks; processingOrganisational unit
08705 - Gruppe Pané Vidal
Funding
101047081/22.00021 - Magnetoelectric 3D printing technology - the revolution of actuatable composites (SBFI)
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