Layer-by-layer self-assembling preparation method for acid-resisting polyelectrolyte compound film

The invention relates to a layer-by-layer self-assembling preparation method for an acid-resisting polyelectrolyte compound film and belongs to the technical field of film separation. Under a positive pressure condition, polycation polymine and polyanion sodium alginate are assembled layer by layer under electrostatic force effect to prepare a pervaporation film with excellent property of separating an organic matter/water system. The film can extremely increase alcohol/water separating factor and especially has excellent property of separating the organic matter/water system (alcohol/water) under the acidic condition. 种耐酸性聚电解质复合膜的层层自组装制备方法，属于膜分离技术领域。在正压条件下将聚阳离子聚乙烯亚胺和聚阴离子海藻酸钠通过静电力作用层层组装制备出对有机物/水体系具有优异分离性能的渗透汽化膜，该膜能很大程度提高醇/水的分离因子，尤其对酸性条件下有机物/水体系(醇/水)具有优异分离性能。