Preparation and characterization of layered membranes constructed by sequential redox-initiated grafting onto polyacrylonitrile ultrafiltration membranes
| العنوان: | Preparation and characterization of layered membranes constructed by sequential redox-initiated grafting onto polyacrylonitrile ultrafiltration membranes |
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| المؤلفون: | Aldo Bottino, Gustavo Capannelli, Sophia Belfer |
| المصدر: | Journal of Applied Polymer Science. 98:509-520 |
| بيانات النشر: | Wiley, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Materials science, Polymers and Plastics, Ultrafiltration, Polyacrylonitrile, General Chemistry, Grafting, Methacrylate, Polyhydroxyethylmethacrylate, Surfaces, Coatings and Films, chemistry.chemical_compound, Monomer, Membrane, Chemical engineering, chemistry, Polymer chemistry, Materials Chemistry, Nanofiltration |
| الوصف: | Layered membranes were prepared by sequential grafting—by means of redox initiators—of water-soluble monomers, with oppositely charged ionic groups, onto ultrafiltration (UF) polyacrylonitrile (PAN) membranes at room temperature. Grafting of a single layer of 2-hydroxyethylmethacrylate (HEMA) onto a PAN membrane gave a highly grafted membrane with a relatively high water flux. Bilayered membranes with various properties containing poly-2-(dimethylamino)ethyl methacrylate (p-2DMAEMA) as the bottom layer and polymethacrylic acid or polystyrenesulfonic acid (p-SSA) as the upper layer were prepared and compared—by means of infrared spectroscopy and electron microscopy—with single-layered membranes of grafted polyhydroxyethylmethacrylate. Layered membranes exhibited a significant decline in water flux in comparison with the initial UF membranes. The flux could, however, be manipulated by controlling the concentration of monomers, the time of grafting, and the number of layers. When four layers of p-2DMAEMA and p-SSA were sequentially grafted onto a PAN membrane, pure water fluxes were stable over a wide range of pH values and did not change over long storage times. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 509–520, 2005 |
| تدمد: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.22142 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::7de421da81e89149f3d46ecab38d7651 https://doi.org/10.1002/app.22142 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........7de421da81e89149f3d46ecab38d7651 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10974628 00218995 |
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| DOI: | 10.1002/app.22142 |