Preparation and characterization of polyvinylidene fluoride hollow fiber membranes for ultrafiltration

Khayet, M.; Chen, Feng; Khulbe, K.C.; Matsuura, Takeshi

doi:10.1016/s0032-3861(02)00237-9

Cited by 263 publications

(136 citation statements)

References 20 publications

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“…Hence, PVDF has been the subject of active research in polymer science and has received increasing attention for various membrane separations (Khayet et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Preparation of hydrophobic PVDF hollow fiber membranes for desalination through membrane distillation

Hou

Wang

et al. 2009

Water Science and Technology

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Fabrication of polyvinylidene fluoride (PVDF) hydrophobic asymmetric hollow fiber membranes was studied by introducing inorganic salt LiCl and water soluble polymer polyethylene glycol (PEG) 1500, using N,N-dimethylacetamide (DMAc) as solvent and tap water as the coagulation medium. The membranes properties also were tested and characterized. It is found that the nonsolvent additive can increase membranes porosity, ether LiCl or PEG 1500. Because of the addition of PEG 1500, the PVDF membranes obtained a rough topography on the membrane surface and the contact angle of the PVDF membranes increased to 113.508 compared to 89.828 of the PVDF membranes spun without an additive. During direct contact membrane distillation (DCMD) of 0.6 M sodium chloride solution, the PVDF membranes spun with PEG 1500 as a non-solvent additive achieved higher water permeation flux compared to the membranes spun from PVDF/DMAc and PVDF/DMAC/LiCl dopes, but the latter two membranes exhibited higher salt rejection rate.

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“…Hence, PVDF has been the subject of active research in polymer science and has received increasing attention for various membrane separations (Khayet et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Preparation of hydrophobic PVDF hollow fiber membranes for desalination through membrane distillation

Hou

Wang

et al. 2009

Water Science and Technology

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“…16 Poly(vinyl pyrrolidone) (PVP), which is amorphous and water soluble polymer, is commonly used as additive to control the pore structure in preparation of polymeric membranes. 17 In the ESD process, PVP is also effective for controlling the pore structure. 18 The electret fibers due to their polar structure can enhance the collection efficiency of aerosol for not only charged aerosol but also uncharged aerosol.…”

mentioning

confidence: 99%

Preparation of Porous PVDF Nanofiber from PVDF/PVP Blend by Electrospray Deposition

Nasir

Matsumoto

Minagawa

et al. 2007

Polym J

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ABSTRACT:Nanofiber with porous structures were prepared by electrospray deposition (ESD) from poly(vinylidene fluoride) (PVDF)/poly(vinylpyrrolidone) (PVP) blend and subsequent selective removal of PVP. In the present work, the effect of blending ratio of PVDF/PVP on formation of the pore and crystal structure of residual PVDF fiber was investigated. The residual PVDF nanofiber showed a higher specific surface area (the highest specific surface area was 28.54 m 2 /g from PVDF/PVP = 67/33 w/w). The Fourier transform infrared spectroscopy and wide angle X-ray diffraction measurement also showed that selective removal of PVP enhanced the formation of -phase crystal structure in PVDF nanofiber (-phase content > 90%).

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“…Permeability was determined from the slope of the plots in Figure 5 using Equation 6 and is represented in Table 3. It was observed that the hydraulic permeability (Pm) is higher in B membrane, which confirms that the B membrane is more porous than the A membrane.…”

Section: Hydraulic Permeability (Pm) and Membrane Hydraulic Resistancmentioning

confidence: 99%

“…With these superior properties, PVDF has been considered for utilization in various membrane-based separations e.g. micro/ultra/nano-filtration 5,6 , membrane distillation [7][8][9] , pervaporation 10 and membrane gas absorption 11,12 . The phase inversion technique is commonly used to prepare PVDF membranes.…”

Section: Introductionmentioning

confidence: 99%

Effect of non-solvents used in the coagulation bath on morphology of PVDF membranes

et al. 2012

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The aim of this paper was to prepare a poly (vinylidene fluoride) (PVDF) membrane using different non-solvents in the coagulation bath for the phase inversion method. In order to increase the mechanical strength of membranes, facing the pressure of work, was used a macro-porous polyester support. The morphology and structure of the resulting membranes were evaluated by scanning electron microscopy, porosity measurements, water and 1-octanol uptake, contact angle, pure water flux, hydraulic permeability and hydraulic resistance. The morphology and pure water flux changed significantly using ethanol (symmetric membrane) and/or water (asymmetric membrane) as the non-solvent. The symmetric membrane presented a high hydrophobic surface (water contact angle ~136°) and a higher pure water flux and porosity than the asymmetric membrane, which presented a lower hydrophobicity surface (water contact angle ~90°). The morphologies obtained suggest different applications.

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Preparation and characterization of polyvinylidene fluoride hollow fiber membranes for ultrafiltration

Cited by 263 publications

References 20 publications

Preparation of hydrophobic PVDF hollow fiber membranes for desalination through membrane distillation

Preparation of hydrophobic PVDF hollow fiber membranes for desalination through membrane distillation

Preparation of Porous PVDF Nanofiber from PVDF/PVP Blend by Electrospray Deposition

Effect of non-solvents used in the coagulation bath on morphology of PVDF membranes

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