Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation / Hongbin Li in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 6 (12/2019) . - p. 451-466 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 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21322	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 1 / 1)