RT Journal Article
T1 Mechanism of formation of hollow fiber membranes for membrane distillation: 1. Inner coagulation power effect on morphological characteristics
A1 García Fernández, Loreto
A1 García Payo, M. Carmen
A1 Khayet Souhaimi, Mohamed
AB Hollow fiber membrane morphology and inner surface structure were analyzed based on the thermodynamic and kinetics of the phase inversion process. Different nonsolvent mixtures formed by N,N-dimethyl acetamide (DMAC) and distilled water were considered. By means of Hansen solubility parameters, lower interaction between the nonsolvent and the mixed solvent (DMAC/trimethyl phosphate, TMP) was observed when greater amount of DMAC was added in the nonsolvent. The spinning solution became thermodynamically more stable and kinetically showed slower coagulation rates, being both related to the resultant membrane formation. In this first study poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) hollow fiber membranes were prepared by the dry/wet spinning technique employing the above cited nonsolvent mixtures as an internal coagulant. Their effect on the internal structure of the membrane evolved towards a more open-porous inner surface when increasing the solvent content in the bore liquid. Various characterization techniques were used in order to analyze the adequacy of these membranes for desalination by direct contact membrane distillation (DCMD). It was found that all the properties together with the permeability of the hollow fibers improved when the coagulation power of the nonsolvent was reduced.
PB Elsevier
SN 0376-7388
YR 2017
FD 2017-11-15
LK https://hdl.handle.net/20.500.14352/100282
UL https://hdl.handle.net/20.500.14352/100282
LA eng
NO L. García-Fernández, M.C. García-Payo, M. Khayet, Mechanism of formation of hollow fiber membranes for membrane distillation: 1. Inner coagulation power effect on morphological characteristics, Journal of Membrane Science, Volume 542, 2017, Pages 456-468, ISSN 0376-7388, https://doi.org/10.1016/j.memsci.2017.03.036.
NO Está depositada la versión postprint del artículo
NO Ministerio de Economía y Competitividad (España)
NO Ministerio de Educación, Cultura y Deporte (España)
DS Docta Complutense
RD 7 abr 2025