Polyethersulfone/Graphene Oxide Ultrafiltration Membranes from Solutions in Ionic Liquid
| Autor: | Dooli Kim, Dinesh K. Mahalingam, Suzana Pereira Nunes |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Ultrafiltration Oxide 02 engineering and technology Permeance 010402 general chemistry 01 natural sciences law.invention Contact angle chemistry.chemical_compound law General Materials Science chemistry.chemical_classification Chromatography Graphene Mechanical Engineering Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Membrane chemistry Chemical engineering Mechanics of Materials Ionic liquid 0210 nano-technology |
| Zdroj: | MRS Advances. 2:2505-2511 |
| ISSN: | 2059-8521 |
| Popis: | Novel high flux polyethersulfone (PES) ultrafiltration membranes were fabricated by incorporating different amounts of graphene oxide (GO) sheets to PES as nanofillers. The membranes were prepared from solutions in 50/50 1-ethyl-3-methylimidazolium-diethylphosphate/N,N-dimethyl formamide. It was observed that the water permeance increased from 550 to 800 L m−2h−1bar−1, with incorporation of 1 wt% GO, keeping a molecular weight cutoff (MWCO) of approximately 32–34 kg mol−1. Cross-sectional scanning electron microscopy images of GO/PES membranes showed the formation of ultrathin selective layer unlike pristine membranes. Contact angle measurements confirmed the increase of hydrophilicity, by increasing the GO concentration. The rejection of humic acid and bovine serum albumin was demonstrated. The mechanical properties were improved, compared with the pristine membranes. The performance was just above the trade-off relationship between permeance and separation factor for PES membranes reported in the literature. |
| Databáze: | OpenAIRE |
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