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Anhydrous interfacial polymerization of sub-1 Å sieving polyamide membrane
Highly permeable polyamide (PA) membrane capable of precise ionic sieving can be utilized for many energy-efficient chemical separations. To fulfill this target, it is crucial to innovate membrane-forming process to induce a narrow pore-size distribution. Herein, we report an anhydrous interfacial p...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10665378/ https://www.ncbi.nlm.nih.gov/pubmed/37993445 http://dx.doi.org/10.1038/s41467-023-43291-2 |
Sumario: | Highly permeable polyamide (PA) membrane capable of precise ionic sieving can be utilized for many energy-efficient chemical separations. To fulfill this target, it is crucial to innovate membrane-forming process to induce a narrow pore-size distribution. Herein, we report an anhydrous interfacial polymerization (AIP) at a solid-liquid interface where the amine layer sublimated is in direct contact with the alkane containing acyl chlorides. In such a heterophase interface, water-caused side reactions are eliminated, and the amines in compact arrangement enable an intensive and orderly IP reaction, leading to a unique PA layer with an ionic sieving accuracy of 0.5 Å. The AIP-PA membrane demonstrates excellent separation selectivities of monovalent and divalent cations such as Mg(2+)/Li(+) (78.3) and anions such as Cl(-)/SO(4)(2-) (29.2) together with a high water flux up to 13.6 L m(−2) h(−1) bar(−1). Our AIP strategy may provide inspirations for engineering high-precision PA membranes available in various advanced separations. |
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