Evaluation of asymmetrical structure dialysis membrane by tortuous capillary pore diffusion model
Evaluation of asymmetrical structure dialysis membrane by tortuous capillary pore diffusion model
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DOI：
10.1016/j.memsci.2006.10.018
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发表时间：
2007-01-05
影响因子：
9.5
通讯作者：
Sakai, Kiyotaka
中科院分区：
文献类型：
--
作者：
Yamamoto, Ken-ichiro;Hayama, Masayo;Sakai, Kiyotaka
曲折毛细管孔扩散模型 (TCPDM) 已用于根据孔径、表面孔隙率、壁厚和曲折度等简单结构参数来估计扩散渗透率和纯水渗透率。该模型对于均质膜评估的有效性已经得到证实。最近，存在使用由合成聚合物例如聚丙烯腈(PAN)、聚砜(PS)和聚醚砜多芳基化合物(PEPA)共混聚合物制成的不对称透析膜的趋势。本研究的目的是将 TCPDM 简化为双层膜，应用 TCPDM 来评估具有不对称结构的市售中空纤维透析膜。 TCPDM 能够根据膜厚度、孔径、纯水渗透性和含水量的数据来估计具有表层和支撑层的不对称透析膜的孔曲折度。 TCPDM 获得的扩散渗透率值与实验数据非常吻合。该 TCPDM 模型不仅可用于评估均质膜，还可用于评估非对称膜。 (c) 2006 Elsevier B.V. 保留所有权利。
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. (c) 2006 Elsevier B.V. All rights reserved.