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介绍了聚乙烯醇（ＰＶＡ）与马来酸（ＭＡ）酯化交联膜的制备及性能表征。ＰＶＡ与ＭＡ在浓硫酸催化下，高温脱水酯化交联。利用红外光谱（ＩＲ）、拉伸强度分别表征了交联膜的化学结构及力学性能。在沸水中测定了ＰＶＡ交联膜的耐水性，将ＰＶＡ与聚丙烯腈（ＰＡＮ）制成ＰＶＡ－ＰＡＮ交联复合膜用于渗透汽化法分离乙醇—水混合物。研究了交联度与复合膜渗透汽化特性之间的关系。 相似文献
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The current density is rather low in solid bipolar membranes, because the water transfer rate is relatively slow across solid bipolar membranes made of solid ion-exchange materials. This paper describes the use of polymer solutions, such as phosphatic poly(vinyl alcohol) solution, poly(acrylic acid) solution and poly(vinyl alcohol) solutions with dispersed cation/anion-exchange resin particles to prepare bipolar membranes. The 0. 1 mol/L NaOH and the 0.05 mol/L H2SO4 were used to test the performance of the bipolar membranes. For a fixed liquid layer thickness, both the current density and the selectivity increase with the concentration increase of a polyelectrolyte solution. The maximum current density measured in the experiment was 1497A/m^2 with a selectivity of 96.8%. 相似文献
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