Fabrication of high performance and durable forward osmosis membranes using mussel-inspired polydopamine-modified polyethylene supports
| Autor: | Kiho Park, Jung Hyun Lee, Sang Hee Park, Hosik Park, Min Gyu Shin, Soon Jin Kwon, Min Sang Park, You In Park, Seungkwan Hong |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Forward osmosis Filtration and Separation 02 engineering and technology engineering.material Polyethylene 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Interfacial polymerization 0104 chemical sciences Membrane technology chemistry.chemical_compound Membrane Coating chemistry Chemical engineering Thin-film composite membrane Polyamide engineering General Materials Science Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Membrane Science. 584:89-99 |
| ISSN: | 0376-7388 |
| Popis: | A thin film composite (TFC) forward osmosis (FO) membrane with high performance and superb durability was fabricated on a polydopamine (PDA)-modified polyethylene (DPE) support via an unconventional aromatic solvent-based interfacial polymerization (IP) method. The PDA coating uniformly hydrophilized the hydrophobic pristine polyethylene (PE) support, which enabled the long-term operation stability. The thin (∼8 μm) and highly porous support structure with interconnected pores was preserved after the PDA modification, leading to a remarkably low structural parameter (∼168 μm) of the support. In addition, the use of the toluene-based IP process allowed for the formation of a highly permselective polyamide selective layer on the hydrophilic DPE support, which was challenging with the conventional aliphatic solvent-based IP process. Hence, the prepared DPE-supported TFC (DPE-TFC) membrane exhibited unprecedented high FO performance, i.e., ∼4.5 times higher FO water flux and ∼63% lower specific salt flux (in FO mode) compared to the commercial HTI-CTA membrane. Furthermore, the DPE-TFC membrane possessed superior mechanical robustness, which guarantee durable operability and potential application even in mechanically harsh environments. Hence, the PE-supported FO membrane presents a new paradigm in FO membrane technology. |
| Databáze: | OpenAIRE |
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