مشروع البحث: SPIDER-WEB LIKE OMNIPHOBIC MULLITE HOLLOW FIBRE MEMBRANE FOR MEMBRANE DISTILLATION DESALINATION
| dc.contributor.advisor | جامعة الماليزية | |
| dc.date.accessioned | 2024-12-12T13:11:15Z | |
| dc.date.available | 2024-12-12T13:11:15Z | |
| dc.description | CHFM was successfully fabricated through combined phase inversion and sintering techniques. The operational parameters such as mullite content (52.5 to 61.5 wt.%), sintering temperature (1350 to 1550 °C), and air gap (5 to 20 cm) were optimized during the fabrication of mullite CHFM. The resulting membranes were systematically characterized and evaluated in terms of morphology, porosity, mechanical strength, and water flux. In the second stage of the study, the mullite ceramic hollow fibre membrane (MCHFM) was surface-coated with a spider web-like (SWL) Co3O4 rough layer via hydrothermal method at different reaction times (10, 13, 16, and 19 h) before a fluorination step using fluoroalkylsilane (FAS-17) (97%). After surface modification, the synthesized super hydrophilic membrane became highly repellent to water and other low surface tension liquids such as olive oil and engine oil with 32 and 31 mN/m of force, respectively. The surface-modified omniphobic membrane showed super-omniphobic properties towards engine oil at 154°, deionized water at 165°, and near superomniphobicity at 142.1° towards olive oil. In the final stage of this study the hydrothermal reaction time of the omniphobic membranes was studied using the direct contact membrane distillation DCMD test at 60 °C, while utilizing 30 g/L of sodium chloride NaCl and 8 mg/L of humic acid as feed. In addition, the effect of salt concentration (10 to 40 g/L) and feed temperature (50 to 80 °C) was studied using DCMD. The membrane with 16h hydrothermal reaction time (Hy-16h/FAS) was used for long-term stability. The (Hy-16h/FAS) achieved long-term stability as the rejection rate and water flux values were relatively constant (99.99 %) and 22.5 kg/m2.h for about 75 h of the MD process. SEM analysis showed no fouling on the surface modified membrane. This was attributed to the Co3O4 spider web-like particles, which achieved superior anti-fouling properties. This implied the suitability of the fabricated omniphobic MCHFM with an SWL structure for DCMD and seawater desalination, in spite of organic contaminants. | |
| dc.description.abstract | ABSTRACT Membrane distillation (MD), which is capable of high solute rejection, has recently received considerable attention for desalination. Membrane fouling and wetting, on the other hand, continue to be significant problems in membrane distillation systems. To address this issue, it is critical to develop an omniphobic membrane with anti-fouling and anti-wetting properties. Omniphobic membranes offer excellent wetting resistance to low surface tension solutions including waters containing organic solvents, alcohols, and surfactants. This study aims to develop a novel omniphobic ceramic hollow fibre membrane (CHFM) with a hierarchical re entrant structure by growing hierarchical cobalt oxide Co3O4 particles (to increase the surface roughness) via a hydrothermal method that is followed by fluorination. The membrane surface roughness can possibly increase the membrane hydrophobicity while the surface energy can be significantly reduced by the fluorination process, leading to omniphobic surface formation. In the first stage of the study, mullite-based | |
| dc.identifier | 359 | |
| dc.identifier.uri | https://dspace.academy.edu.ly/handle/123456789/879 | |
| dc.subject | seperti sarang labah-labah Co3O4 yang mencapai sifat anti-enapan yang unggul. Hal ini menunjukkan kesesuaian penggunaan MCHFM omnifobik dengan struktur SWL di dalam proses DCMD dan penyahgaraman air laut mahupun bahan cemar organik. | |
| dc.title | SPIDER-WEB LIKE OMNIPHOBIC MULLITE HOLLOW FIBRE MEMBRANE FOR MEMBRANE DISTILLATION DESALINATION | |
| dspace.entity.type | Project | |
| project.endDate | 2023 | |
| project.funder.name | الهندسة الكيميائية والطاقة | |
| project.investigator | MOHAMED FARAG TWIBI | |
| project.startDate | 2022 |