Academic Journal
Viscosity Modification of Polymerizable Bicontinuous Microemulsion by Controlled Radical Polymerization for Membrane Coating Applications
| Title: | Viscosity Modification of Polymerizable Bicontinuous Microemulsion by Controlled Radical Polymerization for Membrane Coating Applications |
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| Authors: | Ephraim Gukelberger, Christian Hitzel, Raffaella Mancuso, Francesco Galiano, Mauro Daniel Luigi Bruno, Roberto Simonutti, Bartolo Gabriele, Alberto Figoli, Jan Hoinkis |
| Source: | Membranes, Vol 10, Iss 9, p 246 (2020) |
| Publisher Information: | MDPI AG, 2020. |
| Publication Year: | 2020 |
| Collection: | LCC:Chemical technology LCC:Chemical engineering |
| Subject Terms: | viscosity modification, polymerizable bicontinuous microemulsion, controlled radical polymerization, membrane coating, wastewater treatment, Chemical technology, TP1-1185, Chemical engineering, TP155-156 |
| More Details: | Membrane modification is becoming ever more relevant for mitigating fouling phenomena within wastewater treatment applications. Past research included a novel low-fouling coating using polymerizable bicontinuous microemulsion (PBM) induced by UV-LED polymerization. This additional cover layer deteriorated the filtration capacity significantly, potentially due to the observed high pore intrusion of the liquid PBM prior to the casting process. Therefore, this work addressed an innovative experimental protocol for controlling the viscosity of polymerizable bicontinuous microemulsions (PBM) before casting on commercial ultrafiltration (UF) membranes. Prior to the coating procedure, the PBM viscosity modulation was carried out by controlled radical polymerization (CRP). The regulation was conducted by introducing the radical inhibitor 2,2,6,6-tetramethylpiperidine 1-oxyl after a certain time (CRP time). The ensuing controlled radical polymerized PBM (CRP-PBM) showed a higher viscosity than the original unpolymerized PBM, as confirmed by rheological measurements. Nevertheless, the resulting CRP-PBM-cast membranes had a lower permeability in water filtration experiments despite a higher viscosity and potentially lower pore intrusion. This result is due to different polymeric structures of the differently polymerized PBM, as confirmed by solid-state nuclear magnetic resonance (NMR) investigations. The findings can be useful for future developments in the membrane science field for production of specific membrane-coating layers for diverse applications. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2077-0375 |
| Relation: | https://www.mdpi.com/2077-0375/10/9/246; https://doaj.org/toc/2077-0375 |
| DOI: | 10.3390/membranes10090246 |
| Access URL: | https://doaj.org/article/c0b82f341d904d558eda5569c1eeda11 |
| Accession Number: | edsdoj.0b82f341d904d558eda5569c1eeda11 |
| Database: | Directory of Open Access Journals |
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| ISSN: | 20770375 |
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| DOI: | 10.3390/membranes10090246 |
| Published in: | Membranes |
| Language: | English |