RT Journal Article
T1 Water desalination by membrane distillation using PVDF-HFP hollow fiber membranes
A1 García Payo, M. Carmen
A1 Essalhi, M.
A1 Khayet Souhaimi, Mohamed
A1 García Fernández, L.
A1 Charfi, K.
A1 Arafat, H.
AB Poly(vinylidene fluoride-co-hexafluoropropylene), PVDF-HFP, hollow fiber membranes were prepared by the dry/wet spinning technique using different polyethylene glycol (PEG) concentrations as non-solvent additive in the dope solution. Two different PEG concentrations (3 and 5 wt.%). The morphology and structural characteristics of the hollow fiber membranes were studied by means of optical microscopy, scanning electron microscopy, atomic force microscopy (AFM) and void volume fraction. The experimental permeate flux and the salt (NaCl) rejection factor were determined using direct contact membrane distillation (DCMD) process. An increase of the PEG content in the spinning solution resulted in a faster coagulation of the PVDF-HFP copolymer and a transition of the cross-section internal layer structure from a sponge-type structure to a finger-type structure. Pore size, nodule size and roughness parameters of both the internal and external hollow fiber surfaces were determined by AFM. It was observed that both the pore size and roughness of the internal surface of the hollow fibers enhanced with increasing the PEG concentration, whereas no change was observed at the outer surface. The void volume fraction increased with the increase of the PEG content in the spinning solution resulting in a higher DCMD flux and a smaller salt rejection factor.
PB Techno-Press
SN 2005-8624
YR 2010
FD 2010-07
LK https://hdl.handle.net/20.500.14352/44303
UL https://hdl.handle.net/20.500.14352/44303
NO The author (M. Essalhi) is thankful to Middle East Desalination Research Centre (MEDRC) for the grant (Project 06-AS007). The authors also gratefully acknowledge the financial support of the Spanish Ministry of Science and Innovation (Project FIS2006-05323). The authors wish also to thank the financial support of the University Complutense of Madrid, UCM-BSCH (Project GR58/08, UCM group 910336).
NO Middle East Desalination Research Centre (MEDRC)
NO Ministerio de Ciencia e Innovación (MICINN)
NO University Complutense of Madrid, UCM-BSCH
DS Docta Complutense
RD 9 abr 2025