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Therefore, an indirect determination method based on selective solute permeation data has to be used. Recently Kastelan-Kunst et al. proposed a method that enabled the determination of pore size and PSD in the membrane upper layer (skin). The concept and the procedure are based on the surface force-pore flow (SF-PF) model of material transport through a membrane, and experimentally obtained solute rejections for a number of markers. The SF-PF model takes into account interaction forces between the membrane surface and the solute, expressed by an electrostatic or a Lennard¨CJones-type potential function, and the solute and solvent transport through the membrane under the influence of such forces. In the course of calculation, pertinent quantities such as permeation volume permeation rate, solute concentration at the pore outlet and solute rejection for a single pore were defined. By adding up these quantities for a collection of pores the permeation rate and the solute rejection factor values of various markers were computed as functions of pore size distribution through the collection of active pores of the membrane¡¯s upper layer. The results were finally compared with experimental data to give the best fit pore size distribution in the membrane¡¯s skin. In addition to pore dimensions and PSD the effective number of pores in the membrane¡¯s skin could have been calculated using this method.

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anzhitingnan: ½ð±Ò+80, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-03-18 15:38:59
Therefore, an indirect determination method based on selective solute permeation data has to be used.
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Recently Kastelan-Kunst et al. proposed a method that enabled the determination of pore size and PSD in the membrane upper layer (skin).
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The concept and the procedure are based on the surface force-pore flow (SF-PF) model of material transport through a membrane, and experimentally obtained solute rejections for a number of markers.
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The SF-PF model takes into account interaction forces between the membrane surface and the solute, expressed by an electrostatic or a Lennard¨CJones-type potential function, and the solute and solvent transport through the membrane under the influence of such forces.
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In the course of calculation, pertinent quantities such as permeation volume permeation rate, solute concentration at the pore outlet and solute rejection for a single pore were defined.
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By adding up these quantities for a collection of pores£¬ the permeation rate and the solute rejection factor values of various markers were computed as functions of pore size distribution through the collection of active pores of the membrane¡¯s upper layer.
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The results were finally compared with experimental data to give the best fit pore size distribution in the membrane¡¯s skin.
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In addition to pore dimensions and PSD£¬the effective number of pores in the membrane¡¯s skin could have been calculated using this method.
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anzhitingnan

¾èÖú¹ó±ö (СÓÐÃûÆø)

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2Â¥: Originally posted by Î人һÐÄÒ»Òë at 2015-03-15 21:53:31
Therefore, an indirect determination method based on selective solute permeation data has to be used.
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Recently Kastelan-Kunst et al. pr ...

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