期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 37, 页码 20101-20110出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta02178a
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资金
- Cambridge Centre for Carbon Reduction in Chemical Technology Phase 2 (C4T2) [A-0005328-01-00]
- Ministry of Education of Singapore [A-0009181-00-00]
Engineering membranes for precise molecular sieving in harsh organic solvents offer unprecedented opportunities for widening the application of organic solvent nanofiltration (OSN). Here, we introduce tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as the monomer to form robust conjugated microporous polymer (CMP) membranes via electrochemical polymerization for OSN in a challenging environment. The membranes show size-dependent selectivity towards charged dyes and pharmaceutical molecules, and exhibit excellent stability in harsh organic solvents containing high base content.
Engineering membranes for precise molecular sieving in harsh organic solvents offer unprecedented opportunities for widening the application of organic solvent nanofiltration (OSN). Here, we introduce tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as the monomer to form robust conjugated microporous polymer (CMP) membranes via electrochemical polymerization for OSN in a challenging environment. The method enables the use of rigid CMP membranes in harsh dimethylformamide (DMF) with temperature up to 100 degrees C. The resulting membranes show size-dependent selectivity towards charged dyes and pharmaceutical molecules. Moreover, the membranes present excellent stability in DMF solution containing a high base content of triethylamine at different temperatures due to their rigid crosslinked chemical structure. The optimal membrane can reach 94.4 +/- 2.2% rejection of Allura Red AC (496.42 g mol(-1)) at a dimethylformamide (DMF) permeance of 33.1 +/- 1.2 L m(-2) h(-1) bar(-1) at 100 degrees C. To the best of our knowledge, this is the first report to experimentally recognize the unique advantages of CMPs in high-temperature OSN applications.
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