以聚四氟乙烯(PTFE)微粉填充聚二甲基硅氧烷(PDMS)硅橡胶膜为活性皮层和PET无纺布为底膜,制备了PTFE-PDMS/PET渗透汽化复合膜并用于分离乙醇水溶液,分析了复合膜结构、疏水性、力学性能及溶胀性能.研究表明,随着PDMS复合膜中PTFE含量(质量分数,下同)增加,复合膜结晶度及水接触角增加；断裂伸长率和拉伸强度均呈现先增加后减小的趋势；膜溶胀度呈线性减少.复合膜渗透汽化选择性α和乙醇渗透系数JE随PTFE含量的增加先增加后减少,而水渗透系数Jw呈逐渐减小的趋势,当PTFE填充量为10％时,乙醇渗透系数JE最大.
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