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中文摘要：
制备了一系列聚二甲基硅氧烷（PDMS）均质膜，用于渗透汽化法分离甲醇／碳酸二甲酯混合物，此系列PDMS均质膜优先脱除碳酸二甲酯。考查了PDMS均质膜在甲醇和碳酸二甲酯液体中的溶胀性能，并研究了PDMS预聚体的黏度、交联剂浓度、操作温度及料液浓度对渗透汽化分离性能的影响。结果表明，对于不同黏度的PDMS预聚体均表现出随交联剂浓度增加分离因子先增加后减小，而渗透通量则逐渐减小；随操作温度增加分离因子减小而渗透通量增大；随料液中碳酸二甲酯浓度增加分离因子先增加后减小，而渗透通量则逐渐增大。对于碳酸二甲酯浓度为30％的甲醇／碳酸二甲酯混合物，40℃时渗透侧碳酸二甲酯浓度为59.7％，分离因子为3.46，渗透通量为1.41kg／（m^2·h）。
英文摘要：
A serial of Polydimethylsiloxane （PDMS） homogeneous membranes were prepared for removing dimethyl carbonate （DMC） from DMC/methanol （MeOH） mixtures by pervaporation. The membranes were characterized by swelling experiment in MeOH and DMC solution, respectively. In addition, the effects of viscosity of PDMS prepolymer, cross-linking agent content, operation temperatures and feed concentration on pervaporation performances were investigated. Using the membranes prepared by different PDMS pre - polymers, the separation factor increased first and then decreased but the permeate fluxes decreased, as the cross-linking agent content increased. With increasing the operation temperature, the separation factor decreased but the permeate fluxes increased; with increasing DMC concentration in feed, the separation factor also decreased but the permeate fluxes also increased, For separating DMC/MeOH azeotrope with 30% DMC, the DMC concentration in permeate side was 59.7%, the separation factor was 3.46, and the permeate flux was 1.41 kg/（m^2·h）.
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