Fouling-resistant membranes for separation of oil-in-water emulsions
| Autor: | Tsutomu Sonoda, Atsushi Hozumi, Guangyu Zhang, Longbiao Li, Yan Huang, Zhaohui Su |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fouling
General Chemical Engineering Membrane fouling 02 engineering and technology General Chemistry Permeation 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Membrane technology Polystyrene sulfonate chemistry.chemical_compound Membrane chemistry Pulmonary surfactant Chemical engineering Sodium dodecyl sulfate 0210 nano-technology |
| Zdroj: | RSC Advances. 8:5306-5311 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c7ra13605f |
| Popis: | Separation by membrane technology of oily wastewater, especially emulsified oil/water mixtures, has become a topic of intensive study in recent years, and membrane fouling remains a challenge. In this work, porous polycarbonate membranes were coated with poly(diallyldimethylammonium chloride)/polystyrene sulfonate (PDDA/PSS) multilayers via the facile layer-by-layer deposition technique to improve their fouling resistance for separation of oil-in-water emulsions stabilized by ionic surfactants. The permeation flux for the virgin membrane was found to decrease by ∼90% in 10 cycles due to fouling. The membranes coated with PSS-capped PEMs were used to separate emulsions stabilized by sodium dodecyl sulfate, an anionic surfactant, whereas the ones modified with PDDA-capped PEMs were effective for separation of emulsions stabilized by cetyltrimethyl ammonium bromide, a cationic surfactant. Both retained up to 80% of their original permeation flux after 10 separation cycles. The purity of the filtrates was greater than 99.98%. |
| Databáze: | OpenAIRE |
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