Document Details
|
Document Type |
: |
Thesis |
|
Document Title |
: |
DEVELOPMENT AND CHARACTERIZATION OF POLY (VINYLIDENE FLUORIDE) (PVDF) NANOFIBER MEMBRANES BY ELECTROSPINNING PROCESS FOR MEMBRANE DISTILLATION APPLICATIONS تطوير وتوصيف أغشية النانو لبوليمر فينيل ثنائي الفلورايد من خلال عملية الغزل الكهربائي لتطبيقات التقطير الغشائي |
|
Subject |
: |
Faculty of Science |
|
Document Language |
: |
Arabic |
|
Abstract |
: |
Throughout the ages, water scarcity has remained the biggest problem in the world, and still, it is one of the most important global challenges to date. To address this issue, membrane separation technologies have been extensively researched in recent years due to their unique characteristics. The major challenge for membrane distillation (MD) is membrane wetting resistance. The proposed solution for this issue was to fabricate membranes with as high as possible hydrophobic properties. Hydrophobic electrospun Poly (vinylidene fluoride-co-hexafluoropropylene, PVDF-HFP) nanofiber membranes were produced for water treatment purposes and used in the direct contact membrane distillation (DCMD) technique. These nanofiber membranes were prepared from different polymeric solution compositions: 10% of PVDF-HFP was used with three different weight ratios of DMF/acetone (6:4, 5:5, and 4:6 wt%), and the 6:4 wt% of DMF/acetone was used with three different polymer percentages (6, 8, and 10%) to prepare three different polymeric solutions. Also, 6% of PVDF-HFP was used with 6:4,5:5, and 4:6 wt% of DMSO/acetone. LiCl was added to all polymeric solutions to enhance the spin ability in electrospinning. All nanofiber membranes obtained from electrospinning were post-treated in two separate stages. The effects of thickness, porosity, pore size, and LEP of nanofiber membranes were studied. The hydrophobicity was investigated by optical contact angle goniometry. The crystallinity and thermal properties were studied by DSC and XRD, while the functional groups and morphological structure were studied by FTIR and AFM, respectively. PVDF filter disc and all nanofiber membranes were applied in DCMD. The comparison of the quantity and quality of permeated water has shown all nanofiber membranes showed good behavior with different water flux and salt rejection greater than 90%. Salt rejection was also found to be 99% with PVDF filter disc and nanofiber membranes that were prepared from DMF/acetone 6:4 wt% with 10% and 8% of PVDF-HFP, but they had very little average water flux (22 and 19 kg m-2 h-1, respectively).
Key words: Polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP), Nanofibers, Electrospinning, Hydrophobic membrane, Membrane distillation. |
|
Supervisor |
: |
Dr. Nazeeha Suliman Alkayal |
|
Thesis Type |
: |
Master Thesis |
|
Publishing Year |
: |
1445 AH
2023 AD |
|
Co-Supervisor |
: |
Dr. Lassaad Gzara |
|
Added Date |
: |
Saturday, November 4, 2023 |
|
Researchers
| أمجاد موسى عسيري | Asiri, Amjad Mousa | Researcher | Master | |
|
Back To Researches Page
|