Interforce initiated by magnetic nanoparticles for reducing internal concentration polarization in CTA forward osmosis membrane
| Autor: | Xue-Jiao Guo, Zhen-Liang Xu, Xiang-Yu Chi, Ping-Yun Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Forward osmosis Pressure-retarded osmosis 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Interfacial polymerization Surfaces Coatings and Films Cellulose triacetate chemistry.chemical_compound Membrane 020401 chemical engineering chemistry Chemical engineering Permeability (electromagnetism) Materials Chemistry Magnetic nanoparticles 0204 chemical engineering 0210 nano-technology Concentration polarization |
| Zdroj: | Journal of Applied Polymer Science. 134 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.44852 |
| Popis: | The interforce between the magnetic composite forward osmosis (FO) membranes and the magnetic draw solution was proposed to reduce the internal concentration polarization (ICP) of FO process, and realized the synergetic permeability improvement of resultant FO membranes. The key factor was the successful fabrication of the Fe3O4 magnetic nanoparticles (MNPs) with small-size and narrow distribution via co-precipitation method. The cellulose triacetate (CTA) magnetic composite FO membranes were fabricated using Fe3O4 as additive via in situ interfacial polymerization, and named CTA-Fe3O4. Dynamic light scattering (DLS) and zeta results showed that the coated sodium oleate on the MNPs explained their reducing aggregation and the stability of various pHs. The MNPs' surface segregation during demixing process resulted in the improvement of hydrophilicity, Fe content and roughness of resultant CTA-Fe3O4 composite FO membranes. Furthermore, the in situ interfacial polymerization resulted in the formation of the polyamide selective layer, and the CTA-Fe3O4 membrane's N content was 11.02% to 11.12%. The permeability properties (FO and pressure retarded osmosis modules) were characterized using 1.0M NaCl and 100 mg/L Fe3O4 as draw solutions, respectively. The results indicated that the higher concentration of MNPs supplied more interforce and better FO permeability properties. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44852. |
| Databáze: | OpenAIRE |
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