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A rationale for the preparation of asymmetric pervaporation membranes

机译：制备不对称渗透蒸发膜的基本原理

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Pervaporation is carried out primarily with homogeneous membranes. An improvement in permeation rate can be achieved by using asymmetric or composite membranes. In order to maintain a high selectivity, very dense top layers are needed. The formation of asymmetric pervaporation membranes will be discussed in terms of the model proposed by our group: formation of the top layer by gelation; formation of the porous sublayer by liquid-liquid phase separation followed by gelation of the concentrated polymer phase. To obtain very dense top layers the following factors are important: the ratio of nonsolvent inflow and solvent outflow, polymer concentration, location of the liquid-liquid demixing gap, and location of the gel region. Asymmetric membranes have been prepared by varying these factors, and the obtained membranes have been tested on ethanol/water mixtures.

机译：全蒸发主要在均质膜上进行。通过使用不对称或复合膜可以提高渗透率。为了保持高选择性，需要非常致密的顶层。将根据我们小组提出的模型讨论不对称渗透膜的形成：通过凝胶形成顶层；通过凝胶形成顶层；通过凝胶形成顶层。通过液-液相分离形成多孔亚层，然后浓缩聚合物相凝胶化。为了获得非常致密的顶层，以下因素很重要：非溶剂流入与溶剂流出的比率，聚合物浓度，液-液分离间隙的位置以及凝胶区域的位置。通过改变这些因素制备了不对称膜，并且已经在乙醇/水混合物上测试了获得的膜。

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Mulder M.H.V.; Oude Hendrikman J.; Wijmans J.G.; Smolders C.A.;
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年度 1985
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原文格式 PDF
正文语种 {"code":"en","name":"English","id":9}
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7. A rationale for the preparation of asymmetric pervaporation membranes [O] . Mulder, M.H.V., Oude Hendrikman, J., Wijmans, J.G., 1985

机译：制备不对称渗透膜的基本原理
8. Preparation of Pervaporation Membranes. Final Report on Phase 1. [R] . Baker, R. W., Athayede, A. L., Castro, R. 1989

机译：渗透汽化膜的制备。第一阶段的最终报告。

A rationale for the preparation of asymmetric pervaporation membranes

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