In this study, a simple model was proposed to explain the correlation between the EIS results and water flux of a membrane, and a corresponding experiment was designed to confirm it. A series of cellulose acetate membranes with different pore structures were fabricated. The porosity of the membranes was adjusted by adding polyethylene glycol (PEG), which acts as a pore-forming agent, with different molecular weights and contents in the preparation process. Electrochemical impedance spectroscopy (EIS) was utilized to characterize the pore resistance of the membranes. A theoretical equation suggesting an inverse relationship between the pore resistance and water flux was proposed and confirmed by the experimental data. According to this model, EIS can be promisingly used for examining the water flux of separation membranes.

中文翻译：

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醋酸纤维素膜的耐气孔性与水通量的相关性

在这项研究中，提出了一个简单的模型来解释EIS结果与膜的水通量之间的相关性，并设计了相应的实验来确认它。制备了一系列具有不同孔结构的醋酸纤维素膜。通过添加在制备过程中具有不同分子量和含量的聚乙二醇（PEG）来调节膜的孔隙率，聚乙二醇用作成孔剂。电化学阻抗谱法（EIS）用于表征膜的抗孔性。提出了一个理论方程，表明孔隙阻力和水通量之间存在反比关系，并得到了实验数据的证实。根据该模型，EIS有望用于检查分离膜的水通量。