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首页> 外文期刊>Separation and Purification Technology >Characterization of composite nanofiltration membrane using two-parameters model of Extended Nernst-Planck Equation
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Characterization of composite nanofiltration membrane using two-parameters model of Extended Nernst-Planck Equation

机译：利用扩展的能斯特-普朗克方程两参数模型表征复合纳滤膜

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The characteristics of polyamide membranes with respect to interfacial polymerization of diamine mixtures with trimesoyl chloride (TMC) are studied using two-parameter model of Extended Nernst-Planck Equation.The investigation provided the information about the effect of TMC content and reaction time on the diffusive and convective flow of ions through the membrane.These indirectly reflected structural properties such as effective skin thickness,pore size and structural integrity of membrane.Membrane flux and rejection are related to the TMC content and reaction time,when NaCl and CuSO_4 are used as testing solutes.The diffusive transport,-f'_1 triangle open C) and convective transport,J_vC_(1,0)(l - R'_1) contributions are successfully determined by fitting the model to the experimental data to get f'_1 and R'_1 parameters.It was found that at high TMC content the contribution of convective transport over diffusion transport is increased due to the increase of effective thickness.However,for smaller size and higher diffusive solute like Na~+,the ratio of diffusive flow over convective flow is increased at high TMC and high reaction time.This indicated that numbers of tightened pores membrane are increased.An optimum membrane with high flux and high copper ion rejection could be obtained by incorporating 0.1 % (w/v) of TMC in the polymerization reaction mixture under reaction time period of 5 s.
机译：利用扩展的能斯特-普朗克方程的两参数模型研究了聚酰胺膜在三苯甲基氯与二胺混合物与界面胺聚合反应中的特性，为TMC含量和反应时间对扩散的影响提供了信息。这些参数间接反映了膜的结构特性，例如有效表皮厚度，孔尺寸和膜的结构完整性。当使用NaCl和CuSO_4进行测试时，膜通量和截留率与TMC含量和反应时间有关。通过将模型拟合到实验数据以获得f'_1和R成功确定了扩散输运-f'_1三角形开口C）和对流输运J_vC_（1,0）（l-R'_1）的贡献。 '_1参数。发现在高TMC含量下，由于有效厚度的增加，对流输运对扩散输运的贡献增加了。 ver，对于较小的尺寸和较高的扩散溶质（如Na〜+），在较高的TMC和较高的反应时间下，扩散流与对流的比率增加。这表明增加了致密孔膜的数量。在5 s的反应时间下，通过将0.1％（w / v）的TMC加入到聚合反应混合物中，可以获得很高的铜离子排斥率。

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