Electropolymerized thin films with a microporous architecture enabling molecular sieving in harsh organic solvents under high temperature. Issue 37 (24th August 2022)

• Record Type: Journal Article
• Authors: Lu, Yanqiu; Liu, Wei; Wang, Kaiyu; Zhang, Sui
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 37(2022)
• Page Start: 20101
• Page End: 20110
• Publication Date: 2022-08-24
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta02178a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Electropolymerized conjugated microporous polymer (CMP) membranes enable molecular sieving in organic solvents under extreme conditions. Abstract : 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 °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 °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.