Title of article :
Evaluation of asymmetrical structure dialysis membrane by tortuous capillary pore diffusion model
Author/Authors :
Ken-ichiro Yamamoto، نويسنده , , Masayo Hayama، نويسنده , , Masato Matsuda، نويسنده , , Taiji Yakushiji، نويسنده , , Makoto Fukuda، نويسنده , , Takehiro Miyasaka، نويسنده , , Kiyotaka Sakai، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Abstract :
The tortuous capillary pore diffusion model (TCPDM) has been used for estimating diffusive and pure water permeability from simple structure parameters such as pore diameter, surface porosity, wall thickness and tortuosity. The validity of this model for evaluation of homogeneous membrane has been already confirmed. Recently, there is a trend toward the use of asymmetrical dialysis membranes made of synthetic polymer such as poly(acrylonitrile) (PAN), polysulfone (PS) and a polyethersulfone polyarylate (PEPA) blend polymer. The purpose of the present study is to apply the TCPDM to evaluation of commercially available hollow-fiber dialysis membranes with asymmetrical structures by simplifying them to a double-layer membrane. The TCPDM is capable of estimating pore tortuosity of asymmetrical dialysis membranes having skin and supporting layers from data on membrane thickness, pore diameter, pure water permeability and water content. Values for diffusive permeability obtained by the TCPDM are in a good agreement with experimental data. This TCPDM model is useful for evaluation of not only homogeneous membrane but also asymmetrical membrane.
Keywords :
Tortuous capillary pore diffusion model (TCPDM) , Asymmetrical membrane , Transmission electron microscopy (TEM) , Atomic force microscopy (AFM)
Journal title :
Journal of Membrane Science
Journal title :
Journal of Membrane Science