Evaluation of dialysis membranes using a tortuous pore model

Kokubo, Kenichi; Sakai, Kiyotaka

doi:10.1002/aic.690441204

Cited by 24 publications

(18 citation statements)

References 35 publications

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“…Key membrane properties that affect the rejection of organic molecules are MWCO, pore size, and membrane morphology 52. However, the PWP is dependant on pore size, surface porosity, selective layer thickness, and tortuosity 53, 54. In this section, the effects of these parameters on the sieving property and PWP will be discussed.…”

Section: Resultsmentioning

confidence: 99%

Ligand Effects on the Surface Composition of Rh‐Containing Ionic Liquid Solutions Used in Hydroformylation Catalysis

Kolbeck¹,

Paape²,

Cremer³

et al. 2010

Chemistry A European J

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The molecular design of nanoporous membranes with desired morphology and selectivity has attracted significant interest over the past few decades. A major problem in their applications is the trade‐off between sieving property and permeability. Here, we report the discovery of elongation‐induced nano‐pore evolution during the external stretching of a novel polyamide‐imide nanofiltration hollow fiber membrane in a dry‐jet wet‐spinning process that simultaneously leads to a decreased pore size but increased pure water permeability. The molecular weight cutoff, pore size, and pore size distribution were finely tuned using this approach. AFM and polarized FTIR verified the nano‐pore morphological evolution and an enhanced molecular orientation in the surface skin layer. The resultant nanofiltration membranes exhibit highly effective fractionation of the monovalent and divalent ions of NaCl/Na2SO4 binary salt solutions. More than 99.5% glutathione can be rejected by the nanofiltration membranes at neutral pH, offering the feasibility of recovering this tripeptide. © 2009 American Institute of Chemical Engineers AIChE J, 2010

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Section: Resultsmentioning

confidence: 99%

Ligand Effects on the Surface Composition of Rh‐Containing Ionic Liquid Solutions Used in Hydroformylation Catalysis

Kolbeck¹,

Paape²,

Cremer³

et al. 2010

Chemistry A European J

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“…52 However, the PWP is dependant on pore size, surface porosity, selective layer thickness, and tortuosity. 53,54 In this section, the effects of these parameters on the sieving property and PWP will be discussed.…”

Section: Resultsmentioning

confidence: 99%

Polyamide‐imide nanofiltration hollow fiber membranes with elongation‐induced nano‐pore evolution

et al. 2009

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in Wiley InterScience (www.interscience.wiley.com).The molecular design of nanoporous membranes with desired morphology and selectivity has attracted significant interest over the past few decades. A major problem in their applications is the trade-off between sieving property and permeability. Here, we report the discovery of elongation-induced nano-pore evolution during the external stretching of a novel polyamide-imide nanofiltration hollow fiber membrane in a dry-jet wet-spinning process that simultaneously leads to a decreased pore size but increased pure water permeability. The molecular weight cutoff, pore size, and pore size distribution were finely tuned using this approach. AFM and polarized FTIR verified the nano-pore morphological evolution and an enhanced molecular orientation in the surface skin layer. The resultant nanofiltration membranes exhibit highly effective fractionation of the monovalent and divalent ions of NaCl/ Na 2 SO 4 binary salt solutions. More than 99.5% glutathione can be rejected by the nanofiltration membranes at neutral pH, offering the feasibility of recovering this tripeptide.

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“…With APS-15E and FB-150U membranes, diffusive permeability for tryptophan, Vitamin B 2 , Vitamin B 12 (Wako Pure Chemical Industries, Ltd., Osaka, Japan) was measured by the optical fiber method we have proposed [8,[10][11][12]. Physical property of test solutes is summarized in Table 2.…”

Section: Diffusive Permeabilitymentioning

confidence: 99%

“…This tortuous capillary pore diffusion model (TCPDM) makes it possible to estimate membrane properties such as diffusive and pure water permeability of homogeneous dialysis membranes for lower molecular weight substances from simple structure parameters such as pore diameter, surface porosity, wall thickness and tortuosity [8]. With higher molecular weight substances, however, the values estimated by the TCPDM differ from experimental data.…”

Section: Introductionmentioning

confidence: 95%

Evaluation of asymmetrical structure dialysis membrane by tortuous capillary pore diffusion model

Yamamoto¹,

Hayama²,

Matsuda³

et al. 2007

Journal of Membrane Science

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Evaluation of dialysis membranes using a tortuous pore model

Cited by 24 publications

References 35 publications

Ligand Effects on the Surface Composition of Rh‐Containing Ionic Liquid Solutions Used in Hydroformylation Catalysis

Ligand Effects on the Surface Composition of Rh‐Containing Ionic Liquid Solutions Used in Hydroformylation Catalysis

Polyamide‐imide nanofiltration hollow fiber membranes with elongation‐induced nano‐pore evolution

Evaluation of asymmetrical structure dialysis membrane by tortuous capillary pore diffusion model

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