在40 Hz～10 MHz频率范围测量了纳滤膜在8种电解质溶液中的介电谱,发现了两个随电解质浓度而变化的弛豫,建立了由膜内支撑层和分离层以及溶液相构筑的三相体系介电模型,并利用严格的数值解析法计算了体系中各组成相的电参数,聚焦于10<'3>Hz左右因膜内层间界面极化而引起的低频弛豫,考察了两层电参数与电解质种类和浓度的关系,计算得到膜内各层的介电性质,并获得了关于不同电解质在膜内支撑层和分离层中的分布的信息.
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