Assessment of Blend PVDF Membranes, and the Effect of Polymer Concentration and Blend Composition
| Autor: | Imtiaz Ali, Mohamed F. Soliman, Lassaad Gzara, Enrico Drioli, Mohamed Bassyouni, Omar A. Bamaga, Mohamed Helmy Abdel-Aziz, Mohammed Albeirutty |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
membrane distillation Filtration and Separation 02 engineering and technology Membrane distillation lcsh:Chemical technology Article chemistry.chemical_compound PVDF membrane 020401 chemical engineering Copolymer Chemical Engineering (miscellaneous) lcsh:TP1-1185 0204 chemical engineering lcsh:Chemical engineering Porosity Tetrahydrofuran chemistry.chemical_classification Process Chemistry and Technology lcsh:TP155-156 Polymer 021001 nanoscience & nanotechnology blended membranes Membrane Chemical engineering chemistry Permeability (electromagnetism) Dimethylformamide mixed–solvent 0210 nano-technology |
| Zdroj: | Membranes Membranes, Vol 8, Iss 1, p 13 (2018) Membranes; Volume 8; Issue 1; Pages: 13 |
| ISSN: | 2077-0375 |
| Popis: | In this work, PVDF homopolymer was blended with PVDF-co-HFP copolymer and studied in terms of morphology, porosity, pore size, hydrophobicity, permeability, and mechanical properties. Different solvents, namely N-Methyl-2 pyrrolidone (NMP), Tetrahydrofuran (THF), and Dimethylformamide (DMF) solvents, were used to fabricate blended PVDF flat sheet membranes without the introduction of any pore forming agent, through a non-solvent induced phase separation (NIPS) technique. Furthermore, the performance of the fabricated membranes was investigated for pressure and thermal driven applications. The porosity of the membranes was slightly increased with the increase in the overall content of PVDF and by the inclusion of PVDF copolymer. Total PVDF content, copolymer content, and mixed-solvent have a positive effect on mechanical properties. The addition of copolymer increased the hydrophobicity when the total PVDF content was 20%. At 25% and with the inclusion of mixed-solvent, the hydrophobicity was adversely affected. The permeability of the membranes increased with the increase in the overall content of PVDF. Mixed-solvents significantly improved permeability. |
| Databáze: | OpenAIRE |
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