Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane Distillation
The optimization of the properties for MD membranes is challenging due to the trade-off between water productivity and wetting tendency. Herein, this study presents a novel methodology to examine the properties of MD membranes. Seven polyvinylidene fluoride (PVDF) membranes were synthesized under di...
| Váldodahkkit: | , , , , |
|---|---|
| Materiálatiipa: | Artihkal |
| Giella: | English |
| Almmustuhtton: |
MDPI AG
2021-06-01
|
| Ráidu: | Membranes |
| Fáttát: | |
| Liŋkkat: | https://www.mdpi.com/2077-0375/11/6/437 |
| _version_ | 1827690051954278400 |
|---|---|
| author | Minchul Ahn Hyeongrak Cho Yongjun Choi Seockheon Lee Sangho Lee |
| author_facet | Minchul Ahn Hyeongrak Cho Yongjun Choi Seockheon Lee Sangho Lee |
| author_sort | Minchul Ahn |
| collection | DOAJ |
| description | The optimization of the properties for MD membranes is challenging due to the trade-off between water productivity and wetting tendency. Herein, this study presents a novel methodology to examine the properties of MD membranes. Seven polyvinylidene fluoride (PVDF) membranes were synthesized under different conditions by the phase inversion method and characterized to measure flux, rejection, contact angle (CA), liquid entry pressure (LEP), and pore sizes. Then, water vapor permeability (<i>B<sub>w</sub></i>), salt leakage ratio (<i>L<sub>w</sub></i>), and fiber radius (<i>R<sub>f</sub></i>) were calculated for the in-depth analysis. Results showed that the water vapor permeability and salt leakage ratio of the prepared membranes ranged from 7.76 × 10<sup>−8</sup> s/m to 20.19 × 10<sup>−8</sup> s/m and from 0.0020 to 0.0151, respectively. The <i>R<sub>f</sub></i> calculated using the Purcell model was in the range from 0.598 μm to 1.690 μm. Since the <i>R<sub>f</sub></i> was relatively small, the prepared membranes can have high LEP (more than 1.13 bar) even at low CA (less than 90.8°). The trade-off relations between the water vapor permeability and the other properties could be confirmed from the results of the prepared membranes. Based on these results, the properties of an efficient MD membrane were suggested as a guideline for the membrane development. |
| first_indexed | 2024-03-10T10:31:57Z |
| format | Article |
| id | doaj.art-23dda5fbe6da49b19ada3cc16632791a |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T10:31:57Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-23dda5fbe6da49b19ada3cc16632791a2023-11-21T23:34:27ZengMDPI AGMembranes2077-03752021-06-0111643710.3390/membranes11060437Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane DistillationMinchul Ahn0Hyeongrak Cho1Yongjun Choi2Seockheon Lee3Sangho Lee4School of Civil and Environmental Engineering, Kookmin University, Seoul 02707, KoreaSchool of Civil and Environmental Engineering, Kookmin University, Seoul 02707, KoreaSchool of Civil and Environmental Engineering, Kookmin University, Seoul 02707, KoreaWater and Resource Recycle Center, Korea Institute of Science and Technology, Seoul 02792, KoreaSchool of Civil and Environmental Engineering, Kookmin University, Seoul 02707, KoreaThe optimization of the properties for MD membranes is challenging due to the trade-off between water productivity and wetting tendency. Herein, this study presents a novel methodology to examine the properties of MD membranes. Seven polyvinylidene fluoride (PVDF) membranes were synthesized under different conditions by the phase inversion method and characterized to measure flux, rejection, contact angle (CA), liquid entry pressure (LEP), and pore sizes. Then, water vapor permeability (<i>B<sub>w</sub></i>), salt leakage ratio (<i>L<sub>w</sub></i>), and fiber radius (<i>R<sub>f</sub></i>) were calculated for the in-depth analysis. Results showed that the water vapor permeability and salt leakage ratio of the prepared membranes ranged from 7.76 × 10<sup>−8</sup> s/m to 20.19 × 10<sup>−8</sup> s/m and from 0.0020 to 0.0151, respectively. The <i>R<sub>f</sub></i> calculated using the Purcell model was in the range from 0.598 μm to 1.690 μm. Since the <i>R<sub>f</sub></i> was relatively small, the prepared membranes can have high LEP (more than 1.13 bar) even at low CA (less than 90.8°). The trade-off relations between the water vapor permeability and the other properties could be confirmed from the results of the prepared membranes. Based on these results, the properties of an efficient MD membrane were suggested as a guideline for the membrane development.https://www.mdpi.com/2077-0375/11/6/437membrane distillationmembrane fabricationanalysisfluxwettingliquid entry pressure |
| spellingShingle | Minchul Ahn Hyeongrak Cho Yongjun Choi Seockheon Lee Sangho Lee Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane Distillation Membranes membrane distillation membrane fabrication analysis flux wetting liquid entry pressure |
| title | Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane Distillation |
| title_full | Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane Distillation |
| title_fullStr | Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane Distillation |
| title_full_unstemmed | Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane Distillation |
| title_short | Analysis of Polyvinylidene Fluoride Membranes Fabricated for Membrane Distillation |
| title_sort | analysis of polyvinylidene fluoride membranes fabricated for membrane distillation |
| topic | membrane distillation membrane fabrication analysis flux wetting liquid entry pressure |
| url | https://www.mdpi.com/2077-0375/11/6/437 |
| work_keys_str_mv | AT minchulahn analysisofpolyvinylidenefluoridemembranesfabricatedformembranedistillation AT hyeongrakcho analysisofpolyvinylidenefluoridemembranesfabricatedformembranedistillation AT yongjunchoi analysisofpolyvinylidenefluoridemembranesfabricatedformembranedistillation AT seockheonlee analysisofpolyvinylidenefluoridemembranesfabricatedformembranedistillation AT sangholee analysisofpolyvinylidenefluoridemembranesfabricatedformembranedistillation |