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首页> 外文期刊>Journal of Applied Polymer Science >Swelling Behavior of Pervaporation Membranes in Ethanol-Water Mixtures
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Swelling Behavior of Pervaporation Membranes in Ethanol-Water Mixtures

机译：乙醇-水混合物中全蒸发膜的溶胀行为

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摘要

Novel hydrophobic composite membranes made of crosslinked poly(dimethylsioxane)and poly(methyl hydrogen siloxane)(PDMS-PMHS)with various amounts of catalyst were prepared.Pervaporation experiments with water-ethanol mixtures revealed that an optimum ratio of catalyst topolymer base existed.Both swelling behavior and dynamic-mechanical properties of these silicone films were studied. The swelling experiments in different mixtures of ethanol and water determined that ethanol is preferentially sorbed and that the membranes are only capable to absorb a limited quantity of solvent.Equilibrum swelling data were also used in combination with the analysis of the viscoelastic relaxation of the swollen samples to obtain the dependence of the dynamic-mechanical properties of the silicone films on the quantity of permeants sorbed into the membrane.It was observed that the permselective parameters were related with the mobility of the chains and the rree volume.
机译：制备了由交联的聚二甲基硅氧烷和聚甲基氢硅氧烷（PDMS-PMHS）制成的疏水复合膜，并采用了不同量的催化剂，水-乙醇混合液的全蒸发实验表明存在最佳的催化剂与聚合物基料比。研究了这些有机硅薄膜的溶胀行为和动态机械性能。在乙醇和水的不同混合物中进行溶胀实验，确定乙醇被优先吸附，并且膜仅能够吸收有限量的溶剂。还使用了平衡溶胀数据并结合了溶胀样品的粘弹性松弛分析为了获得有机硅膜的动态力学性能对吸附到膜中的渗透物数量的依赖性，观察到渗透选择参数与链的迁移率和黑胶体积有关。

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