A study of extrusion shear and forced convection residence time in the spinning of polysulfone hollow fiber membranes for gas separation

Sharpe, Iain Douglas; Ismail, Ahmad Fauzi; Shilton, Simon

doi:10.1016/s1383-5866(99)00024-6

Cited by 64 publications

(33 citation statements)

References 27 publications

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“…Many researches were done to find the optimum PSf membrane formulation. A formulation that has been used widely to make ultra thin defect free PSf membranes [21,22,23,24,25,26] was given by Pesek and Koros [27]. Performances of those membranes are given in Table 1.…”

Section: Membrane Formulations and Manufacturing Parametersmentioning

confidence: 99%

“…According to research by Sharpe et al there is an optimum shear rate to produce defect free ultra thin PSf membrane. When the applied shear rate is too low, the membrane will have a thick selective layer while too high shear rate will produce thin and defective selective layer [23]. Literatures review on the effect of shear rate on membranes performance is shown in Table 4.…”

Section: Effect Of Shear Ratementioning

confidence: 99%

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Polysulfone membranes for CO2/CH4 separation: State of the art

Julian¹

2012

IOSRJEN

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The world market for CO 2 /CH 4 separation using membrane technology is getting bigger and polysulfone (PSf) is one of the most widely investigated polymer membrane materials. However, the existing PSf membranes performances are insufficient to fully exploit these opportunities. Therefore, modification that would produce membrane that fit the needs of target separation performances is a main issue. Firstly, various manufacturing processes to achieve best CO 2 /CH 4 separation performance are discussed, including important post-treatments. The formulation of polymer solution and effects of manufacturing parameters on the resulting membranes are presented. Other modifications, which involved PSf structure modification, PSf-based copolymer, mixed matrix membrane and facilitated transport membrane, are also discussed. Performances of those modified membranes are compared with the Robeson's upper bound and some modifications give satisfying results. Finally, commercial application of PSf membranes for CO 2 /CH 4 separation is discussed.

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Section: Membrane Formulations and Manufacturing Parametersmentioning

confidence: 99%

Section: Effect Of Shear Ratementioning

confidence: 99%

Polysulfone membranes for CO2/CH4 separation: State of the art

Julian¹

2012

IOSRJEN

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“…Most of their works have been summarized elsewhere (Mulder, 1996;Chung and Kafchinski, 1997;Freeman and Pinnau, 1999;Sharpe et al, 1999;Clausi and Koros, 2000;Nunes and Peinemann, 2001;Carruthers et al, 2003;Ho, 2003;Baker, 2004). Here we only summarize key progress in the last 10 years.…”

Section: Recent Progresses On Single-layer Asymmetric Hollow-fiber Mementioning

confidence: 99%

Fabrication of Hollow‐Fiber Membranes by Phase Inversion

Chung

2008

Advanced Membrane Technology and Applications

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“…Previous studies on more traditional applications have investigated the effect of increased air velocity, i.e., forced convection conditions for a combination of dry/wet phase-inversion techniques to produce defect free, ultrahigh flux asymmetricmembranes with ultrathin skin layers [28][29][30]. To investigate the effect of evaporation condition on the release rate of drug, tablets were dip coated with cellulose acetate solution containing 10% cellulose acetate, 80% acetone, and 10% water and allowed to dry by blowing air across the surface with a blower (forced convection).…”

Section: Effect Of Evaporation Conditionmentioning

confidence: 99%

In vitro drug release rates from asymmetric-membrane tablet coatings: Prediction of phase-inversion dynamics

Altınkaya

Yenal

2006

Biochemical Engineering Journal

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Most of the controlled-release systems developed for drug delivery applications depend on membrane technology. The dense structure of some membranes used in controlled-release systems can excessively prolong the release of drug due to the low permeability of the coating to drug. To increase the drug release rate, asymmetric-membrane tablet coatings were prepared by a phase-inversion technique using cellulose acetate/acetone/water solution. The roles of the composition of the membrane solution and the evaporation condition on the release rate of drug were determined using in vitro dissolution and morphological studies and predicted phase diagrams. Results show that drug release from asymmetricmembrane based tablet coatings is primarily governed by the dynamics of the phase-inversion process with zero-order or near-zero-order release easily achievable. In an attempt to derive an empirical expression for the release rate of drug as a function of composition of the coating solution, a statistical experimental design was used. Good fit of the experimental data by the empirical expression was obtained. In addition, the predictive capability of the model equation was also found to be satisfactory. Analysis of the significance of each term in the expression indicates that the cellulose acetate:acetone ratio has the most significant influence on the release rate of theophylline.

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A study of extrusion shear and forced convection residence time in the spinning of polysulfone hollow fiber membranes for gas separation

Cited by 64 publications

References 27 publications

Polysulfone membranes for CO2/CH4 separation: State of the art

Polysulfone membranes for CO2/CH4 separation: State of the art

Fabrication of Hollow‐Fiber Membranes by Phase Inversion

In vitro drug release rates from asymmetric-membrane tablet coatings: Prediction of phase-inversion dynamics

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