Expanded polystyrene (EPS) and polyvinyl alcohol (PVA) blend film was prepared by the non-solvent-induced phase separation method. FESEM analysis revealed the porous nature of the polymer membrane. The pore size and density were found to increase with higher loading of PVA. Mechanical testing showed that the incorporation of PVA into the EPS matrix improved Young’s modulus and tensile strength. The wettability of the film was determined by the degree of swelling (DS) and water contact angle measurements. A sharp increase in water absorption capacity and reduction in contact angle were observed for the polymer membrane with higher PVA content. Mass transport behaviour of the as-prepared film was determined using different aliphatic alcohols viz. methanol, ethanol and 2-propanol. The polymer film containing 10% PVA was taken as the optimum blend ratio since it exhibited good permeation capacity and mechanical strength. The selectivity of vapour permeation of the blend film between 2-propanol and acetone was studied.

采用非溶剂诱导相分离法制备了发泡聚苯乙烯（EPS）和聚乙烯醇（PVA）共混薄膜。FESEM 分析揭示了聚合物膜的多孔性质。发现孔径和密度随着 PVA 负载量的增加而增加。机械测试表明，将 PVA 掺入 EPS 基质提高了杨氏模量和拉伸强度。薄膜的润湿性由溶胀度 (DS) 和水接触角测量值决定。对于具有较高 PVA 含量的聚合物膜，观察到吸水能力的急剧增加和接触角的减小。所制备的薄膜的传质行为是使用不同的脂肪醇来确定的，即。甲醇、乙醇和 2-丙醇。含有10% PVA的聚合物薄膜被认为是最佳的混合比例，因为它表现出良好的渗透能力和机械强度。研究了2-丙醇和丙酮之间共混膜的蒸汽渗透选择性。