Abstract: In the separation process of liquid surfactant membrane,one of the important reasons causing permeation swelling is that the carrier reacts with the solute at the interface of emulsion and then solubi lization of water in membrane phase is caused not only by surfactant but also by carrier-solute complex.Furthermore，water diffusion through the membrane goes on due to both the chemical potential of electrolytes and the chenmical potential between reactants and reaction products .A mathematical model for estimating the permeation swelling rate during extraction is proposed.The prediction results are in good agreement with the experimental data.

摘要： 根据膜相中载体萃取的机理，指出载体在萃取溶质后形成的络合物具有一定的亲水性．采用气相色谱法，分别对含有表面活性剂和载体的膜相在与乳酸溶液接触后的溶水率进行了测定，结果发现其溶水率远高于与无溶质的外相水接触后的膜相溶水率．所以渗透溶胀进人内相的水除表面活性剂分子结合的迁移外还有载体-溶质络合物结合水．从而提出了实际萃取过程中乳化液膜渗透溶胀的反应-溶解-扩散机理，并提出了相应的数学模型，经与实验数据比较，结果吻合较好．