| Titre : |
Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation |
| Type de document : |
texte imprimé |
| Auteurs : |
Hongbin Li, Auteur ; Xiangwei Feng, Auteur ; Wenying Shi, Auteur ; Zhang Haixia, Auteur ; Qiyun Du, Auteur ; Longwei Qin, Auteur ; Xiaohong Qin, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 451-466 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Angle de contact
Caractérisation
Colorants
Colorants -- Elimination
Déchets industriels -- Elimination
Eaux usées -- Epuration
Fibres creuses
Hydrophobie
Membranes (technologie)
Polyfluorure de vinylidène
|
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
Hydrophobic polyvinylidene fluoride (PVDF) hollow fibre composite membranes were prepared by the dilute solution coating process to build a special surface structure that was similar to the dual micro‐nano structure on the lotus leaf. Poly(vinylidene fluoride‐co‐hexafluoropropene) was chosen as the hydrophobic polymer candidate in dilute solution. Membrane morphology and surface hydrophobicity were evaluated by scanning electron microscopy and dynamic water contact angle measurement. The prepared PVDF hollow fibre membranes were employed to separate dyes (Congo Red and Methylene Blue) from water by vacuum membrane distillation. The effects of operational conditions (feed temperature, vacuum pressure and feed flow rate) on the vacuum membrane distillation performance of different PVDF membranes were investigated. The results indicated that the water contact angle values of PVDF composite membrane surfaces improved from 93.6° to 130.8°, which was mainly attributed to the formation of micro‐nano rods. This structure was similar to the dual micro‐nano structure on the lotus leaf. Under test feed temperature, vacuum pressure and feed flow rate conditions, the dye rejection rate of Congo Red and Methylene Blue by the hydrophobic PVDF hollow fibre membrane remained above 99.5% and 99%, which was higher than that of the pristine PVDF membrane (99% and 98%, respectively). In addition, the hydrophobic PVDF hollow fibre composite membrane showed higher permeation flux under different conditions compared with the pristine PVDF membrane, which was attributed to membrane surface hydrophobicity and the electrostatic interactions between dyes and the PVDF membrane surface. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of the single PVDF hollow fibre membrane - Preparation of the composite PVDF hollow fibre membrane - Characterisation of the PVDF hollow fibre membrane - VMD experiments - Membrane anti-fouling experiments
- RESULTS AND DISCUSSION : Morphology of different PVDF hollow fibre membranes - performance parameters of different PVDF membranes - Hydrophobicity of the membrane surface - Performance characterisation of hollow fibre membranes in VMD for dye removal - Effects of feed temperature on VMD performance - Effects of vacuum pressure on VMD performance - Effects of feed flow rate on VMD performance - Fouling behaviour of hollow fibre membranes in VME for dye removal |
| DOI : |
10.1111/cote.12436 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12436 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33377 |
in COLORATION TECHNOLOGY > Vol. 135, N° 6 (12/2019) . - p. 451-466
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Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)
