3D printed MOF-based mixed matrix thin-film composite membranes
| Autor: | Sameh K. Elsaidi, Jeffrey R. McCutcheon, Michael Gipple, Mona H. Mohamed, Lingxiang Zhu, Ali K. Sekizkardes, David G. Hopkinson, Mayur Ostwal |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Fabrication Materials science General Chemical Engineering Composite number 02 engineering and technology General Chemistry Permeance Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Casting 0104 chemical sciences Membrane Chemical engineering chemistry Thin-film composite membrane 0210 nano-technology Selectivity |
| Zdroj: | RSC Advances. 11:25658-25663 |
| ISSN: | 2046-2069 |
| Popis: | MOF-based mixed-matrix membranes (MMMs) have attracted considerable attention due to their tremendous separation performance and facile processability. In large-scale applications such as CO2 separation from flue gas, it is necessary to have high gas permeance, which can be achieved using thin membranes. However, there are only a handful of MOF MMMs that are fabricated in the form of thin-film composite (TFC) membranes. We propose herein the fabrication of robust thin-film composite mixed-matrix membranes (TFC MMMs) using a three dimensional (3D) printing technique with a thickness of 2–3 μm. We systematically studied the effect of casting concentration and number of electrospray cycles on membrane thickness and CO2 separation performance. Using a low concentration of polymer of intrinsic microporosity (PIM-1) or PIM-1/HKUST-1 solution (0.1 wt%) leads to TFC membranes with a thickness of less than 500 nm, but the fabricated membranes showed poor CO2/N2 selectivity, which could be attributed to microscopic defects. To avoid these microscale defects, we increased the concentration of the casting solution to 0.5 wt% resulting in TFC MMMs with a thickness of 2–3 μm which showed three times higher CO2 permeance than the neat PIM-1 membrane. These membranes represent the first examples of 3D printed TFC MMMs using the electrospray printing technique. |
| Databáze: | OpenAIRE |
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