以聚偏氟乙烯( PVDF)为基膜、聚二甲基硅氧烷(PDMS)为选择层制备了PDMS/PVDF复合膜,应用于渗透汽化分离乙醇/水混合物.系统研究了膜交联温度、操作温度、物料浓度和膜下侧压力对乙醇/水混合物的渗透汽化分离性能的影响,发现经130℃交联的复合膜在温度为60℃时,对乙醇的分离因子为8.23,可将乙醇浓度从体积分数为25％提升至74％左右,其渗透通量达到281.36 g/ (m2·h).随着操作温度的升高,分离因子先上升后下降；而随物料中乙醇浓度的升高,渗透通量增大.随膜渗透侧压力减小,分离系数和渗透通量均提高.
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