Membrane thickness and preparation temperature as key parameters for controlling the macrovoid structure of chiral activated membranes (CAM)

Conesa, Aleix; Gumı́, Tània; Palet, Cristina

doi:10.1016/j.memsci.2006.10.006

Cited by 58 publications

(32 citation statements)

References 32 publications

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“…In other words, the dimension of macrovoids is hindered by decreasing casting solution thickness and the tiny space between top and bottom layer of the casting solution. Similar results were reported for the dependency of macrovoid formation on the thickness of casting solution in membrane formation by wet phase separation [29][30][31][32]. The effect of casting solution thickness on flux and rejection are depicted in Figs.…”

Section: Influence Of Polymer Concentrationsupporting

confidence: 83%

Effect of Casting Solution on Morphology and Performance of PVDF Microfiltration Membranes

Madaeni¹,

Taheri²

2011

Chem Eng & Technol

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The effects of preparation-influencing parameters such as polymer concentration, thickness of casting solution, and type of solvent on morphology and performance of poly(vinylidene difluoride) (PVDF) microfiltration membranes for the treatment of emulsified oily wastewater were investigated. Flat-sheet membranes were prepared from a casting solution of polymer and additive in various solvents by immersing the prepared films in nonsolvent-containing mixtures of water and 2-propanol. The membranes were characterized using scanning electron microscopy. Increasing the polymer concentration and membrane thickness significantly affected the pore size, leading to permeate flux decrease. An attempt was made to correlate the effect of the solvent on membrane morphology and performance employing solubility parameters between solvent and nonsolvent).

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Section: Influence Of Polymer Concentrationsupporting

confidence: 83%

Effect of Casting Solution on Morphology and Performance of PVDF Microfiltration Membranes

Madaeni¹,

Taheri²

2011

Chem Eng & Technol

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“…The thickness of the top skin layer could be determined by means of scanning electron microscope (SEM) photographs. 16 All experiments, in this study, were performed with the same membrane operation procedure.…”

Section: Membrane Preparationmentioning

confidence: 99%

“…Moreover, the thickness of the HTBN top layer was determined to be about 11 lm from the SEM photograph by the scale tab. 16 The surface morphologies of the PAN membrane and HTBN/PAN composite membrane were shown in Figure 4(a,b), respectively. When compared Figure 4(a) with Figure 4(b), the originally porous surface of the PAN substrate was covered by a flat featureless HTBN layer, and the surface of the HTBN/PAN composite is dense and there is no pinhole or crack.…”

Section: Sem Photographs Of Membranesmentioning

confidence: 99%

Liquefied petroleum gas desulfurization by HTBN/PAN composite membrane

Chen

Han

et al. 2010

J of Applied Polymer Sci

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Hydroxyl-terminated polybutadiene/acrylonitrile (HTBN) polymer material was selected for deep desulfurization of liquefied petroleum gas (LPG) according to the solubility parameter method, and then crosslinked HTBN membranes were prepared, in which asymmetric polyacrylonitrile (PAN) membranes prepared with phase inversion method acted as the microporous supporting layer in the flat-plate composite membrane. The different function compositions of composite membranes were characterized by reflection FTIR in order to investigate the crosslinking reaction. The surface and section of composite membranes were investigated by scanning electron microscope (SEM). The composite membranes prepared in this study were used in LPG for deep desulfurization. Effects of amount of HTBN and operation pressure on the desulfurization efficiency of LPG were investigated experimentally. Experiment results demonstrated that with the membrane having a HTBN layer of 11 lm, permeability parameter of methyl mercaptan came to 17,002 Barrer and that of hydrocarbon came to 504 Barrer at 30 wt % of HTBN and 0.25 MPa, which showed that the membrane used to desulfurization in LPG can achieve high-removal efficiency. These results demonstrated that the membrane separation method could be significant in practical application for deep desulfurization of LPG.

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“…In the former case, when phase inversion takes place after a considerable delay, which is the case with the evaporation technique procedure, the obtained membranes are dense, symmetric and do not give rise to macrovoid formation. A deeper research of polysulfone membrane characterization was doing by Conesa et al [11].…”

Section: Membrane Thickness Characterization By Semmentioning

confidence: 99%

Near infrared spectroscopy: A novel technique for classifying and characterizing polysulfone membranes

Conesa¹,

Gumı́²,

Coello³

et al. 2007

Journal of Membrane Science

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Membrane thickness and preparation temperature as key parameters for controlling the macrovoid structure of chiral activated membranes (CAM)

Cited by 58 publications

References 32 publications

Effect of Casting Solution on Morphology and Performance of PVDF Microfiltration Membranes

Effect of Casting Solution on Morphology and Performance of PVDF Microfiltration Membranes

Liquefied petroleum gas desulfurization by HTBN/PAN composite membrane

Near infrared spectroscopy: A novel technique for classifying and characterizing polysulfone membranes

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